Line #29 Main/CastFromCalories


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7	->''"It's like this layer of dimensional reality that seems to manipulate space-time. I call it the Speed Force. It causes me to burn a tremendous amount of calories, so I am just a black hole of snacks. A snack hole."''
8	-->-- '''The Flash''', ''Film/{{Justice\|League2017}} [[Film/ZackSnydersJusticeLeague League]]''
9
10	Typically, FunctionalMagic is assumed to rely on some universal, pervasive force, like a BackgroundMagicField, as its {{mana}} fuel source. Alternately, it might be drawn from the collective LifeEnergy of the local environment. In a pinch, it could come from [[ReligionIsMagic helpful gods]]. But if these aren't available, it might just be possible for a supernatural being to utilize the stored caloric energy of their own body as a power source. This might be a desperation tactic or the only option in the setting.
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12	From a physics standpoint, this actually makes a surprising amount of sense. There's enough chemical energy in a living person to make a reasonably powerful bomb, if it were possible to combust it all at once. If we assume magic has some means of efficiently converting calories into the proper form, the results could be very noticeable- and the subject would find their last few meals negated, if not suddenly suffering malnutrition. Of course, the effectiveness of this process tends to be heavily exaggerated; similarly, the amount one can eat at one time in order to recompense this usage tends also to be exaggerated; many magical entities are {{Big Eater}}s who can easily wolf down massive amounts of food, which is apparently changed instantly to a metaphysical form that doesn't take up physical space.
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14	It can be hard to separate this trope from its close relative, CastFromHitpoints, and indeed they can easily overlap, as the difference between physical bodily energy and the metaphysical concept of LifeEnergy can be hard to clarify. To distinguish them, consider the following question: when feeling the effects of supernatural overexertion, which would be a better remedy, a night's sleep or a solid meal?
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16	This trope can also easily overlap with HyperactiveMetabolism, which entails a boost to natural abilities, usually in the form of healing, from eating. Despite the name, has nothing to do with WizardNeedsFoodBadly, a video game trope involving the need for food as an arbitrary restriction.
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18	----
19	!!Examples:
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21	[[foldercontrol]]
22
23	[[folder:Anime & Manga]]
24	* Dreams of Alice, the {{Reality Warp\|er}}ing children in ''Manga/AliceAndZoroku'', burn calories to use their powers. In the first episode, the man in charge of the research facility Sana's escaping from notes they kept her calorie intake low precisely so they could limit her ability to use her powers to get away. Sana ultimately makes her getaway when a third party enters the fray and gives her juice to drink, giving her just enough energy to teleport out of there. Soon after meeting Zoroku, he treats her to food, and the other customers in the restaurant wonder if she's in some kind of eating competition.
25	* In ''Manga/{{Bleach}}'' the souls of the deceased don't ordinarily have to eat, but those who have a significant reservoir of spirit energy do. Their intake doesn't necessarily correlate to their spiritual output, however.
26	* ''Anime/DigimonAdventure'': The Chosen Digimon require a minimum stash of energy to digivolve. At one point, Agumon tried to do so on an empty stomach and failed.
27	* ''Franchise/DragonBall'' is probably the TropeCodifier for manga and has definitely influenced other works, especially in Japan. All fighters need calories for KiManipulation and are {{Big Eater}}s as a result.
28	** This is one of the first indications that Goku was different. From a young age, Goku showed off an ability to consume unbelievable amounts of food. In early stories, he would often be weakened by hunger to the point of uselessness. As he grew, his stamina increased and this became less of a problem. A RunningGag was whenever Goku goes for dinner, he will cause whatever unfortunate restaurant he's eating at to run out of food. Pile after piles of bowls will stack up around him, while he eats '''courses''' meant for groups of people.
29	** It's later revealed this is a trait shared by Saiyans in general. Vegeta, Gohan, Goten, Trunks, and even Nappa are prone to eating the same enormous amounts. A famous scene during the Buu Arc has Goku, Vegeta, and Gohan at the World Tournament diner, pouring food down and piling bowls up. Krillin even remarks wondering what Saiyan stomachs were made of.
30	* In the ''Franchise/LyricalNanoha'', the magical energy mages use to cast their spells is generated by their bodies, so they have to replenish their calories at every opportunity. This is particularly true of frontline combat mages, like Subaru Nakajima, who is the series' resident BigEater (due to also having to continuously expend her mana to [[spoiler:power up all the cyber-enhancements built into her cyborg body]]). It's also implied that different styles of magic are more energy-intensive than others with Belkan and Neo-Belkan mages being the most calorie intensive. Hence Subaru and Erio being much [[BigEater bigger eaters]] than Fate, the most close-combat-focused user of Mid-Childan style magic in the series.
31	* In ''Manga/MagiLabyrinthOfMagic'', Aladdin needs to draw on his food reserves to summon Ugo. It's why he's quite the BigEater.
32	* ''Manga/MyHeroAcademia'':
33	** Momo Yaoyorozu is technically a case of Cast From Fatty Acids; her Creation quirk transmutes the lipids in her body to form any object she can think of. The effect is pretty much the same since eating is the easiest way she can replenish them.
34	** The Pro Hero known as Fat Gum possesses a quirk called "[[{{Kevlard}} Fat Absorption]]", allowing him to both absorb damage from attacks and trap enemies with his fat. He can also use the energy his fat has absorbed to unleash a devastating blow, though it requires him to burn off all of his fat and renders him unable to use his quirk again until he's put the weight back on.
35	** Sugar Rush, Rikido Sato’s quirk, lets him greatly increase his strength and stamina, and the more he eats, the stronger he gets. Unfortunately, he tends to go hypoglycemic once he’s expended it all.
36	* In ''Manga/{{Naruto}}'', Choji has a SuperMode that uses calories and is triggered by FoodPills. It's considered a DangerousForbiddenTechnique because it consumes so many nutrients that the user dies; however, Choji is so enormously fat that he has barely enough energy to survive and becomes comically skinny in an instant. Parodied, when Naruto and Sasuke seem to be doing this, gouging down food and asking for more... only to hurl the food they had just eaten back up.
37	* In ''Anime/NegimaSecondSeason'', the Pactio system is reworked to draw on the partner's calorie count instead of the mage's magic reserves like in the manga. Thus, while Negi was testing Nodoka's Cosplay card, her stomach growled after changing back and he bought her a hamburger to make up for it. This plot point becomes an issue whenever the students are trapped in a separate dimension without any access to food.
38	* ''Manga/OnePiece'':
39	** Luffy's Gear Second speeds up his metabolism to a ridiculous degree, granting him SuperSpeed. As a result, it burns calories ''very'' quickly and switches over to CastFromLifespan if he doesn't have the necessary energy.
40	** Luffy's Gear Fourth form, Tankman, works in the same way, only even more powerful and more voracious in its energy consumption. He was only able to safely use it when up against an enemy whose power was creating unlimited amounts of food, with Luffy running around eating that food for 11 hours straight. When he ''did'' use it though, he utterly [[CurbStompBattle curb-stomped]] the guy in a few seconds.
41	* Shuto Kisaragi, the protagonist of ''Manga/{{Ratman}}'', soon discovers that he's developed an enormous appetite after becoming the eponymous Ratman, as the transformation requires him to burn an insane amount of calories to maintain it.
42	* Literally the case in ''Literature/{{Slayers}}''. WordOfGod is that the bodies of those with high magical capacity fuel that capacity directly from the calories in the food they eat, which is why even waifish and petite girls like Amelia and Lina (both powerful spell-casters) eat thousands of calories at each meal and remain thin.
43	* This is the downside to Georgette Lemare's [[HealingHands healing magic]] in ''Manga/StrikeWitches''. Using it gives her a literal HyperactiveMetabolism, so she needs to [[BigEater eat noticeably more]] than the other girls in the 502nd.
44	* ''Manga/{{Toriko}}'' is a story ''literally'' about food and eating. It makes a frequent point that those endowed with Gourmet Cells gain superhuman powers but pay for this with ''extreme'' appetites. They need to keep eating vast amounts of food every day to stay alive. One character, Kosairou, weaponizes this with his [[PaperTalisman Calorie Eater]], which forces whoever's touched by his talismans to exhaust huge amounts of calories for nothing.
45	[[/folder]]
46
47	[[folder:Comic Books]]
48	* ''ComicBook/DungeonTheEarlyYears'': Horus and Alcibiade once escaped a trap by casting an anticipative necromancy spell on themselves, starving to death, returning as zombies, and devouring an entire herd of cows to return to living state.
49	* ''ComicBook/TheFlash'': Wally West had to take in high levels of nutrition to recharge himself. He overcame this weakness later, but since he was a BigEater at heart, he didn't stop eating inhuman levels of food.
50	* ''ComicBook/{{Invincible}}'': Inverted with Atom Eve; she has the power to [[ImaginationBasedSuperpower change the atomic structure of objects]] and essentially turn anything into anything she wants. Any excess mass is converted into caloric energy, and she states that on days she uses her powers a lot she has to "use the bathroom maybe six or seven times".
51	-->'''Eve:''' I get a lot of books read.\
52	'''Mark:''' ...\
53	'''Eve:''' TooMuchInformation?\
54	'''Mark:''' Little bit.
55	* ''Franchise/MarvelUniverse'':
56	** ComicBook/{{Deadpool}} once explained that he has to eat a lot to allow his HealingFactor to work.
57	** ''ComicBook/IronMan'': Ezekiel Stane bioengineered his own body to be able to fire repulsor blasts like Iron Man, but doing so burns a lot of energy. He compensates by consuming a ''very'' high-calorie goo.
58	--->'''Ezekiel:''' ''[squeezing a tube into his mouth]'' Here comes 20,000 calories just like mom used to make.
59	** ''ComicBook/MsMarvel2014'': When using her shapeshifting to heal, Kamala becomes extraordinarily hungry and needs to eat to recharge her powers.
60	** ''ComicBook/TotallyAwesomeHulk'': Amadeus Cho needs to consume lots of calories to maintain the mass and energy needed to [[HulkingOut Hulk out]].
61	** ComicBook/{{Wolverine}}, [[PowersAsPrograms whose healing factor is what Deadpool's is derived from]], is occasionally depicted as needing to fill up with high-protein meals to fuel his healing. He advises ComicBook/{{X 23}} to follow suit.
62	[[/folder]]
63
64	[[folder:Fan Works]]
65	* In ''Fanfic/AmazingFantasy'', Izuku and his mother are astonished by his new appetite after he recovers from the spider bite that hospitalized him. He goes from barely touching his food to devouring multiple plates full of eggs and toast and still having room for more. His spider-powers start developing the same day.
66	* Stockpile Quirks in ''Fanfic/FlashbackMHA'' are depicted as requiring the user to eat massive amounts of food to power them. Both Izuku and Eri have been shown scarfing down massive amounts of food to fuel One for All and Rewind, respectively.
67	* In ''Fanfic/KarmaInRetrograde'', Touya's powerful fire Quirk quickly burns through his energy reserves, exhausting him if he's ever forced to fight over a prolonged period. This made him sickly when combined with his naturally weak constitution. Touya tried to make up the difference by eating twice as many vegetables and drinking milk, but he's constantly miffed that his younger brother Natsuo ended up taller than him. This also means that he has few real food preferences, as he's too busy [[BigEater trying not to starve himself]] to be [[TooDesperateToBePicky picky about the taste.]]
68	* ''Fanfic/MyHeroSchoolAdventureIsAllWrongAsExpected'': Several of Hachiman's copied Quirks burn extra calories, especially things like rapid muscle rebuilding (very helpful for workouts). It gets to the point where he's eating five meals per day plus snacks and is still severely malnourished.
69	* ''Fanfic/TheSecretReturnOfAlexMack'': GC-161 gives Alex a very fast metabolism, and using her powers further increases her need for food. After she [[spoiler:rides a nuclear missile across the world and disassembles it in midair, following a hard fight to stop any other launches]], she's so hungry that she's getting dizzy and loopy.
70	* Subverted in ''Fanfic/WithThisRing''; although Kid Flash is indeed a BigEater, that still isn't enough calories to account for moving at the speed of sound, and Paul believes his appetite is caused by a flaw in the SuperSerum he made.
71	[[/folder]]
72
73	[[folder:Films -- Live-Action]]
74	* In ''Film/TheAmazingSpiderMan'', after his powers started developing, Peter also showed a huge gain in appetite. When he gets home he grabs '''all''' of the food from the fridge, including Aunt May's meatloaf, which according to Uncle Ben ''nobody'' liked.
75	* ''Film/Constantine2005'': After Constantine uses his psychic powers to visit Hell for some info, he tells Rachel that he needs food, thus leading to an exposition scene in a diner.
76	* In ''Film/JusticeLeague2017'' and ''Film/ZackSnydersJusticeLeague'', Barry Allen mentions that he's become "a black hole of snacks" since getting his SuperSpeed powers.
77	[[/folder]]
78
79	[[folder:Literature]]
80	* In Mark A. Garland's ''The Demon Blade'' series, wizards cast from their body's energy reserves, so before trying any serious feat of magic they have to fatten themselves up.
81	* ''The Daidem Saga'', in ''Quester's Endgame'', Aleytys has to disarm a bomb. She used a time manipulation power from the Daidem but had to drink orange juice beforehand to help combat calorie deprivation.
82	* {{Discussed\|Trope}} in ''Literature/{{Everworld}}:'' when the group wonders why [[GodOfEvil Loki]] isn't coming after them, April suggests that he might be tired from his battle with Myth/{{Merlin}} that morning. Jalil, the [[AgentScully resident skeptic]] who is [[FlatEarthAtheist constantly annoyed to find himself]] [[TrappedInAnotherWorld in a fantasy world]], sarcastically wonders if magic burns calories.
83	* ''Literature/TheHammer2022'': Due to growing up as a penniless commoner, Tiny had to develop his own mana manipulation technique that wouldn't require special herbs or medicines to improve. The result of his work, the Mana Body technique, succeeds at granting him inhuman strength, speed, and durability, at the cost of making him hungry enough to eat ten days' worth of food in a single sitting.
84	* ''Literature/HeraldsOfValdemar'': At least once when Darkwind is training Elspeth in the ''Mage Winds'' trilogy, he has to remind her to eat because use of mage energy 1) uses up the mage's personal energy reserves (a.k.a. previous meal) and 2) suppresses appetite.
85	* Implied, though downplayed, in ''Literature/KnightsOfTheBorrowedDark'' - after Grey speaks [[MagicalIncantation Sunrise]], their next stop is a cafe where he makes short work of a large amount of coffee and sausage rolls. Later, when [[spoiler:Denizen]] pushes himself into a HeroicRROD by messing up Sunrise, he wakes extremely hungry. It's not clarified whether this is the case for all Cants, or just [[DangerousForbiddenTechnique the Higher ones]].
86	* This is the case for wizards in the ''Literature/LiadenUniverse'' novels. For minor everyday workings, it doesn't have any obvious effect, but a working of any significant size will leave a wizard ravenously hungry, and there are at least two examples of a wizard visibly losing weight after a major working. (One is in ''Conflict of Honors'', and is followed by Priscilla looking in the mirror and reflecting that she looks like she's the survivor of a famine.)
87	* ''In Literature/PrincessHolyAura'', doing magic or supernatural fighting burns a lot of energy, some of which must come from the magic user. This puts a severe hamper on Silvertail's magic usage.
88	-->''The worst trial school currently presented was that they couldn't eat as much as they wanted to without making spectacles of themselves. [[spoiler:Seika]] had discovered that the day after her first transformation. She didn't quite keep up with Holly in the eating department, but she was now eating more than anyone else in her house, easily.''
89	* ''Literature/TheRunelords'' applies this to people who receive endowments of metabolism. They gain increased speed and reflexes, at the cost of having to eat more. It's implied to also increase their rate of aging, but this can be counteracted by endowments of stamina, which improve healing acumen.
90	* In ''Literature/TheSoldierSon'', the magic-users of the Specks people are known as the "Great Ones" and their magic is based on this principle. A Great One has to "eat" the magic present in the world or in other people, and this stored magic manifests in their body as excess fat - using it makes them lose weight, while to replenish their powers they regularly gorge on magic-potent food, usually to the point of obesity. The bigger a Great One is, the more powerful they are and the more respected they are among their peers, while a skinny Great One is immediately identified as weakened and powerless.
91	* In the third book of John Maddox Roberts's ''Stormlands'' series, [[GreenSkinnedSpaceBabe Fyana]] plows through a fairly respectable spread as if she hasn't eaten in days after performing a major healing ritual.
92	* In ''Literature/TheStormlightArchive'''s second book, ''Literature/WordsOfRadiance'', Lift is a Surgebinder -- a person with magical abilities which are powered by [[{{Mana}} Stormlight]]. However, unlike most Surgebinders who must get Stormlight from an external source, Lift can generate her own from the food she eats. While this ability is pretty convenient, it also means that she can not use her magic unless she has the calories to do so. Consequently, she is always hungry.
93	** In ''Literature/RhythmOfWar'' her ability comes in handy when enemies seize Urithiru and disable the Radiants' ability to draw Stormlight which renders most of them unconscious. Lift is able to use her unique ability to stay awake and eventually heal the other Radiants. It's also revealed that [[spoiler:she isn't actually drawing ''Storm''light but a similar source of power known as ''Life''light]].
94	* In ''Literature/SuperMinion'', there are enough mutants and supers whose powers require prodigious amounts of food that there are special tinker-made foods called "speedster [=MREs=]" which are calorically dense enough to keep them going.
95	* In the ''Literature/TowerAndTheHive'' series, it is explained that this is true of people with PsychicPowers. The energy to move things around with one's mind has to come from ''somewhere'', and Talents are mentioned as requiring a much greater calorie intake than ordinary people. Even then, the majority of telekinetics bolster themselves by siphoning power from electric generators to do heavy lifting.
96	* Although normal magic in ''Literature/TheWheelOfTime'' draws from the inexhaustible True Source, Healing uses the energy within the patient's body to heal them. This usually feels like a cold shock, with the severity and duration proportionate to the amount of healing. As such, Healing someone who is on the brink of death may cause them to die from the shock as their body repairs itself. Part of learning Healing is learning how to heal a severely wounded person enough that they don't die from their injuries but not so much that it uses up too much of their energy reserves. In the third book, Mat is Healed of a powerful curse and the lingering effects of the work cause him to become a BigEater, having to eat many huge meals each day without gaining any weight, in order to eventually recover. An improved technique is eventually developed that doesn't have this drawback.
97	[[/folder]]
98
99	[[folder:Live-Action TV]]
100	* ''Series/BuffyTheVampireSlayer'' often hints at this with [[TheChosenOne Slayers]]. Faith casually admits that slaying always makes her "hungry and [[InterplayOfSexAndViolence horny]]", and Dawn remarks at one point that Buffy is "such a pig after killing things," often going to the fridge first thing after patrolling. Writer Douglas Petrie at one point planned for a scene where Buffy [[BigEater ate a lunch that contained three times the normal amount of food]].
101	* ''Series/TheDefenders2017'': Series/{{Luke\|Cage2016}} is incredulous at how [[Series/IronFist2017 Danny Rand]] can eat so much and still be thin.
102	-->'''Luke Cage:''' ''How'' are you still hungry?\
103	'''Danny Rand:''' It takes a lot of energy to summon my chi.
104	* In ''Series/TheFlash2014'', after first gaining his SuperSpeed Barry would often succumb to passing out during the day. It's explained that for Barry to run at such high speeds he consumes a staggering amount of energy, and hence he needs to eat that same amount each day. For convenience, Cisco makes Barry some high-calorie energy bars. Barry also would have a habit of going to Big Belly Burger and eating about 20 or so burgers in one sitting. During the crossover with ''Series/Supergirl2015'', Barry himself says he eats about 10000 calories a day.
105	* Emma from ''Series/GenV'' has to make herself vomit in order to shrink and has to eat to regain her size.
106	[[/folder]]
107
108	[[folder:Roleplay]]
109	* The heroine of the [[InteractiveComic MSPA Fan Adventure]] ''Roleplay/{{Alanna}}'' is struck by hunger when she unconsciously manifests powerful ice magic or survives underwater longer than she naturally should. Turns out [[spoiler:she's partially [[DemonicPossession possessed]] by the DestroyerDeity, who gains power from devouring stuff, and used lots of such power saving her. Before facing the BigBad, the god insists she only do so]] well-rested and well-fed.
110	* In ''Roleplay/DawnOfANewAgeOldportBlues'', Emmanuel's usage of his SuperSpeed burns up calories at an accelerated rate. As such, he's starving after using his power and needs to chow down to get his energy back.
111	* ''Roleplay/{{Glowfic}}'': Eclipsed need to eat a lot to do magic and they get hungry when they use a lot of magic and the scale of things one can do with it is influenced by metabolic efficiency.
112	[[/folder]]
113
114	[[folder:Tabletop Games]]
115	* Easily represented in ''TabletopGame/{{GURPS}}'' by attaching "Increased Consumption" as a Temporary Disadvantage limitation on an ability.
116	* In ''TabletopGame/RedMarkets'' '''every''' skill check involving strength or speed requires the character to expend a charge of rations. Edible food doesn't keep well in [[ScavengerWorld the Loss]].
117	* Tachyon of ''TabletopGame/SentinelsOfTheMultiverse'', like the Flash, is a speedster and is almost constantly eating -- there's a few pieces of official art that have her scarfing down burgers, and in the single promotional comic, she takes a slight detour through the villain's evil lair to hit its cafeteria.
118	* ''TabletopGame/TheUnofficialHollowKnightRPG'': The Energize spell is a slightly odd example of this as while it does cost Belly to work, it doesn't need to be the ''caster's'' -- any nearby target, including enemies or the target of the spell's beneficial effects, can be chosen as the source, meaning that it costs ''other people'' calories when the caster uses it.
119	* In ''TabletopGame/VampireTheMasquerade'', Vampires can spend Blood Points on vampiric abilities; they must then recharge their Blood Pool by snacking on some mortal.
120	* ''TabletopGame/{{Warhammer}} Fantasy'': The ogre's spellcasters use Gut Magic, which, well, works on what the ogre has eaten.
121	[[/folder]]
122
123	[[folder:Video Games]]
124	* [[HumanoidAbomination Noah Brown]] from ''VideoGame/ActionTaimanin'' is a Chimera, a being made by combining the DNA of many powerful demons making her a powerhouse in battle, but using any of that power for longer than a few seconds tires her out and leaves her very hungry to the point that going at full power for a few minutes made her pass out (InUniverse notes speculate it might be intentional, as a deliberately engineered weakness).
125	* ''VideoGame/BioShock'' [[ZigzaggingTrope zig-zags it]] - most food in the first game [[HyperactiveMetabolism just heals your health]], not affecting your EVE bar, aside from the pep bars (which apparently are advertised as "Now with a burst of EVE!"). Alcoholic drinks drain your EVE while restoring your health, presumed to be because they are depressants, while (probably caffeinated) coffee restores EVE. Cigarettes/pipe tobacco, which are stimulants, restore EVE while also taking some of your health in return. The second game confuses the matter by adding a soft drink and plain fresh water to the lineup EVE-restoring drinks, and by having the painkiller aspirin restoring EVE. The fresh water and aspirin consumables are absent in ''VideoGame/BioshockInfinite'', and throw in a single exception with the alcoholic drinks salts-to-health (salts being the new name for the EVE-equivalent resource in ''Infinite'') trading concept - flasks of unknown booze that will halve your salts, but fully heal you.
126	* ''VideoGame/FateGrandOrder'': The Yaga race are a new species of humans that were created by fusing humans with Demonic Beasts, turning them into "beastmen" so they can survive the new Ice Age (although, Holmes later explains the difference between Yaga and beastmen). While Yaga are much stronger and durable than the old human race, they require ten times the amount of calories by comparison, which is why starving is a big problem for them.
127	* ''VideoGame/FinalFantasyXIV'' establishes that people who constantly cast spells (especially mage-type characters) will get quite hungry at the end of a fight due to all of their spent aether. This is notable with [[spoiler: G'raha Tia]] where he realizes after having to learn to rely on his own aether again to cast spells, he can get absolutely famished.
128	* Spellcasting in ''VideoGame/GoldenKroneHotel'' causes [[WizardNeedsFoodBadly your hunger to increase a bit]]. Increasing your intelligence lessens the effect, and the Scholar, the game's main magic user, starts with honey and curry noodle soup potions to combat this.
129	* This happens to Melissabelle in ''VideoGame/GranblueFantasy''. Using her powers is really taxing on her stomach. Luckily, she's a competent farmer so food is usually not much of an issue, but she first meets the crew after getting careless and ending up lost in the forest with not even the energy to move.
130	* Sin Kiske from ''VideoGame/GuiltyGear Xrd'' has this as a core mechanic for his gameplay: performing a special move has his Calorie Meter drop 1000 points (he has around 15,000 in total) and requires him to refuel with a specific move if he doesn't have many calories left to "burn" or starves.
131	* ''Franchise/MassEffect'': While not a game mechanic, the LoreCodex states that [[PsychicPowers biotics]] get ravenous appetites from using their powers. Normal Alliance soldiers receive 3000 large calories of rations per day; biotics receive 4500 plus a bottle of energy drink for emergencies. There's even a scene in the third game where Jack is telling her students to fill up on ration bars and energy drinks during a break in a battle.
132	* ''VideoGame/MetalGearSolid3SnakeEater'': The Fear makes use of a prototype [[InvisibilityCloak stealth camo]] during his fight with Snake. However, it's powered by his bioelectricity and drains his stamina very quickly. To compensate, he has to eat near-constantly when using his stealth camo. It even makes him so hungry that he'll scarf down food without checking to see if it's poisoned or rotten first.
133	* Katen from ''VideoGame/NamuAmidaButsuUtena'' loves eating plain butter or fat, as he needs the fat to fuel his PlayingWithFire.
134	* In ''VideoGame/NetHack'' using spells makes you hungry. If you're a wizard, having a high [[TheSixStats Intelligence stat]] reduces how hungry it makes you, and having a high enough Intelligence can even negate the effect.
135	* ''VideoGame/PokemonMysteryDungeon'' games have a hunger stat that is drained faster when you attack other Pokémon, especially if you use links to use multiple attacks at once.
136	* In ''VideoGame/ScarletNexus'', Arashi Spring's psionic power is [[SuperSpeed Hypervelocity]], which causes her to burn ''massive'' amounts of calories when used. This is why she's a BigEater that NeverGetsFat from the cola and OSF rations that she regularly takes, and contributes to her lazy attitude and frequent, long naps because she avoids any activity she believes to be "wasted energy".
137	* Munch's magic in ''VideoGame/TribalHunter'' requires him to use up his stored body fat to do so. Keeping Munch huge will allow him to use magic much more frequently, but due to how a lot of enemies and hazards can force feed or inflate him, [[PopGoesTheHuman it comes with risks]]. Conversely, keeping Munch's body fat to a minimum will make magic casting impossible since he has no fat to burn.
138	* Crest sorcery in the ''VideoGame/WildArms'' series seems to have this effect. Both Cecilia from 1 and Lilka from 2 are noted for their [[BigEater large appetites]] and both have their [[TrademarkFavouriteFood Trademark Favourite Food]]. (Hamburgers or chow mein for Cecilia, jelly rolls for Lilka.)
139	* ''VideoGame/TheWolfAndTheWaves'': Eating blue or gold mushrooms will fill your Curse meter.
140	[[/folder]]
141
142	[[folder:Webcomics]]
143	* In ''Webcomic/TheAdventuresOfDrMcNinja'', [[spoiler:Frans Rayner]] comes back from the dead as a {{Cyborg}} with a single laser eye. But this laser eye is powered by his organic body -- and it uses so much energy that a single shot leaves him too tired to stand, so he only uses it in one-on-one fights when he's sure it will kill his opponent.
144	* Magic in ''Webcomic/ElGoonishShive'' is usually cast through {{Mana}}, but [[http://www.egscomics.com/index.php?id=760 it's stated]] that magicians can burn calories instead if they want -- Nanase even exploits this to eat whatever she wants and still stay trim.
145	* In ''Webcomic/TheFourth'', magic is explicitly said to be powered by calories, Skarva claims that "mana potions" are just milkshakes.
146	* ''Webcomic/RayFox'': Metas require large amounts of calories to use their powers. Ray finds this out when he passes out after being a few days away from home cooking.
147	* Robin in the ''Webcomic/{{Walkyverse}}'' is a [[SuperSpeed speedster]] whose abilities are powered by eating gargantuan amounts of sugar. This is played for laughs in ''Webcomic/{{Shortpacked}}'', where she will occasionally eat something truly outrageous in its caloric content and then wake up from a fugue state weeks or months later to find she's accomplished some lofty achievement in the interim.
148	* In an addendum to the roleplays of ''Webcomic/WhiteDarkLife'', Author!Luigifan shows off his biology knowledge by explicitly stating that many supernatural abilities in the setting, including those of the Belnades sisters, are powered by ATP. He further states that this is replenished over the short term by resting and over the long term by eating.
149	[[/folder]]
150
151	[[folder:Web Original]]
152	* This is referred to as the "Joel Duscher Bird Theory" in ''Podcast/PlumbingTheDeathStar''; Joel Duscher answers "Why Isn't [[ComicBook/XMen Nightcrawler]] Fat?" by positing that using mutant powers like Nightcrawler's teleportation would expend energy like flight does for birds. Problem is, other mutants like Cyclops and "the one with the bees" can't turn their powers off, so under this theory, those characters should be constantly exhausted and starved.
153	* In ''Literature/SavageDivinity'' with enough skill a healer can cure anything short of death, the cost is that healing still needs to convert excess body mass to heal the wound, overtax your healing without eating enough and you will waste away.
154	* In ''Literature/ShadowUnit'', merely ''having'' a paranormal ability doubles a person's daily caloric intake; the team considers an increase in caloric uptake a sign of TraumaticSuperpowerAwakening. Actively using the power can starve you to death in hours (or even faster). Chaz considers himself to be middle-aged -- burning all those calories is medically proven InUniverse to be wearing out various organs -- and nearly starved to death as a child on numerous occasions; his foster families treated it as an eating disorder, so he had to resort to scamming his fellow students for extra lunch money and stealing sticks of butter out of people's fridges just to swallow them whole. When [[spoiler:Chaz is held captive by his uncle/father, he's reduced to a third-world refugee skeleton in a matter of days]].
155	* ''Literature/WhateleyUniverse'': Certain types of mutant powers have a tremendous cost in terms of calories, especially Energizer, [[RealityWarper Warper]], [[HealingFactor Regenerator]], [[HealingHands Healer]], and [[SuperSpeed Speedster]] powers, causing those with such powers to be {{Big Eater}}s (to the point of it being a [[RedRightHand common tell]] that someone is a mutant). One student (Murphy) has brought herself to the brink of death from overexertion of her spatial warping powers, via starvation at the cellular level, on more than one occasion.
156	[[/folder]]
157
158	[[folder:Western Animation]]
159	* In ''WesternAnimation/TheAvengersEarthsMightiestHeroes'', the Incredible Hulk can often be seen sitting in the kitchen of the Avengers Mansion eating entire chickens as if they are drumsticks.
160	* An episode of ''WesternAnimation/AvengersAssemble'' has the entire team sans Black Widow end up infected with a virus that makes them hulk out. At one point Hawkeye is seen raging about a lack of food and how hungry he is, with Hulk explaining that he has to eat a lot because now he's a living gamma reactor. Technically, this means you won't like Hulk when he's hangry, and unfortunately, [[{{Film/TheAvengers2012}} he's always hangry]].
161	* In the ''WesternAnimation/BumpInTheNight'' Christmas special "'Twas the Night Before Bumpy", Mr. Bumpy and Squishington encounter a British hummingbird named Doris D. Bird, who has to eat constantly in order to maintain the energy needed to constantly flap her wings.
162	* In the same continuity as above, ''WesternAnimation/HulkAndTheAgentsOfSmash'' shows that the entire team of hulked-out heroes needs to eat ''a lot''. They have belly buster specials at their favorite diner, of which each of them [[IllTakeTwoBeersToo order multiple for themselves]].
163	* In ''WesternAnimation/JusticeLeague'', Franchise/TheFlash is frequently seen eating high-calorie food whenever he's not actively performing deeds of superheroics. He is, on at least one occasion, seen devouring an armful of hot dogs, which he comments is for keeping up his caloric intake which, as a speedster, is understandably high. His calorie needs also surprise a police officer who asks him if he wants coffee and Flash responds that he takes his with cream and thirty-seven sugars.
164	* The heroes in ''WesternAnimation/MiraculousLadybug'' don't have to eat a lot themselves, but they have to regularly feed the kwamis who enable their transformations. After invoking their special abilities, the transformation will soon drop and extra food is in order.
165	* Kid Flash in ''WesternAnimation/YoungJustice2010'' keeps a small supply of food in a hidden compartment in his right glove, due to his accelerated metabolism.
166	[[/folder]]
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Context Main / CastFromCalories