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7->''"You are what you eat" said a wise old man,\
8Lord, if that's true I'm a garbage can.''
9-->-- '''Creator/VictorBuono''', "The Fat Man's Prayer"
10
11"You are what you eat", as the saying goes. In fiction, this is often taken literally, with a character eating something that causes them to transform into whatever it was they just ate, or the creature it came from (for example, a character may start growing feathers after eating a chicken egg). Can be a source of NightmareFuel when used in a children's show.
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13This is often given some sort of HandWave in that the food was genetically modified, exposed to radiation, infected with TheVirus, of alien origins, [[ArsonMurderAndJaywalking past its use-by date]], [[BreadEggsBreadedEggs or some combination of the above]].
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15This trope may also apply to abilities and behaviour associated with the food source, for example, eating brains may supposedly make one more intelligent, or eating a beef patty may make them start mooing and eating grass.
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17Note that this differs from YouAreWhoYouEat, in that the latter trope is about characters who can do this with their food as an inherent ability. This trope is for when the food itself has these special properties.
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19A newly-transformed sentient pile of food will often discover that it [[ITasteDelicious tastes delicious ]]. See also: CerealInducedSuperpowers. A SisterTrope of MayContainEvil. Can occur because of TamperingWithFoodAndDrink.
20
21----
22!!Examples:
23[[foldercontrol]]
24
25[[folder:Comic Books]]
26* ''ComicBook/InvaderZimOni'': In one issue, Dib's investigation of mutant animals leads him to a stock of discarded, radioactive ice cream.
27* ''ComicBook/TheSmurfs'': "Salad Smurfs" has the Smurfs turning into AnthropomorphicFood after eating magically treated giant vegetables.
28* ''ComicBook/ThargsFutureShocks'': In one comic set in the future, humans hunt down ugly-looking snot aliens who mysteriously reproduce en masse in order to eat their eggs... which naturally turns out to be the very thing that turns others into new aliens.
29[[/folder]]
30
31[[folder:Film -- Animation]]
32* ''WesternAnimation/AnimalCrackers2017'' is based around a magic box of animal crackers owned by a circus that allows the performers to take on animal forms for their performances when eating a corresponding animal cracker (such as becoming a lion after eating a lion cracker, a gorilla after eating a gorilla cracker, etc.). A cracker shaped like the person's normal self automatically appears in the box whenever a person eats an animal cracker so they can return to normal afterward. If the human cracker in question is stolen, destroyed, or is otherwise lost, however, [[ShapeshifterModeLock they're chuck out of luck]]; the box only gives the person the one chance to return to normal. Eating multiple crackers at once is also established to result in MixAndMatchCritters. At the end, the protagonist is inspired by the whole adventure to turn his failed formula for dog treats into animal crackers that temporarily alter your skin to match animal coats.
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35[[folder:Film -- Live-Action]]
36* ''Film/TheStuff'' has the titular Stuff. It's incredibly addictive, and as a person eats more of it they're driven to seek out and consume increasing amounts. Eventually, the consumer melts down from the inside out into more Stuff.
37* The titular monster in ''Film/TheThing1982'' is like a [[TheVirus virus]], able to infect people by merely touching them. Since small particles are enough to take over a body, one of the scientists suggests that everyone prepare their own food and eat out of cans in order to prevent contamination via the digestive system.
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40[[folder:Literature]]
41* {{Downplayed|Trope}} in ''Chocolate Fever'', about a boy who eats nothing but chocolate and chocolate-covered food until he gets chocolate freckles all over his body.
42* This happens in a roundabout way in ''Literature/DrFranklinsIsland''. Semi, at that point a small manta ray-like creature, is presented with the chance to become human again. To that end, powder is poured into her pool, and she notes that consuming it is just like consuming plankton -- like breathing, basically. She and Miranda speculate that the powder is [[LegoGenetics dried-up human DNA]].
43* ''Literature/NightShift'': In "Grey Matter", [[spoiler:a can of contaminated beer turns a man into a BlobMonster]].
44* In "Royal Jelly", a short story by Creator/RoaldDahl, the eponymous substance [[spoiler:slowly transforms a baby into a ''queen bee'' larva. Did wonders for her dad, too]].
45[[/folder]]
46
47[[folder:Live-Action TV]]
48* ''Series/DoctorWho'':
49** In "[[Recap/DoctorWhoS24E3DeltaAndTheBannermen Delta and the Bannermen]]", Billy intentionally eats some "[[MutagenicGoo royal jelly]]" so that he can turn into an alien in order to be with the GreenSkinnedSpaceBabe who he has [[LoveAtFirstSight fallen in love with]] and [[OnlyYouCanRepopulateMyRace repopulate her race]] with her. They live HappilyEverAfter.
50** In "[[Recap/DoctorWhoS30E3PlanetOfTheOod Planet of the Ood]]", Ood Sigma slowly turns CorruptCorporateExecutive Halpen into an Ood by serving him Ood graft instead of what Halpen thinks is [[NeverTrustAHairTonic hair tonic]].
51* In ''Series/ThatsSoRaven'', Chelsea accidentally eats a hamburger on Halloween, which starts a chain of events that results in her and Raven turning themselves into cows.
52* A recurring sketch in ''Tittybangbang'' features a family obsessed with eating nothing but duck and chips. In one sketch, the dad has eaten so much of it that he lays a duck's egg and a baby duck hatches. He's undeterred, and resolves to eat ''more'' duck and chips so he can provide a constant supply of duck for his family.
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55[[folder:Music]]
56* ''{{Music/Vocaloid}}'': In Mushi-P's "Colors and Electricity," a strange creature has the ability to eat objects and project the colors of whatever it eats onto its body. It manages to collect all the colors except yellow, until it sees a child in a yellow raincoat. It eats the child, but is horrified when its body turns red instead of yellow.
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59[[folder:Stand-Up Comedy]]
60* Creator/BillCosby named a book ''[[http://www.amazon.com/Am-What-Ate-Im-Frightened/dp/0060545739/ref=sr_1_1?ie=UTF8&qid=1319749363&sr=8-1 I Am What I Ate... and I'm Frightened!!!]]''.
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63[[folder:Video Games]]
64* ''VideoGame/AncientDomainsOfMystery'' has monster corpses provide special abilities (e.g., fire beetle for fire resistance).
65* The titular creatures from ''VideoGame/{{Bugsnax}}'' combine this with AnthropomorphicFood, as they're described as "[[ExactlyWhatItSaysOnTheTin half bug, half snak]]", and anyone who eats them has a random body part resemble a part of the Bugsnak they ate. The effects are temporary [[spoiler:unless you eat too many. At that point, your body [[BodyHorror breaks apart]] and is absorbed into [[ThatsNoMoon the massive snak gestalt that's overtaken their island]], where the pieces transform into more Bugsnax]].
66* A character in ''VideoGame/ChronoCross'' ("[[PunnyName Funguy]]") eats a special mushroom that transforms him into a MushroomMan.
67* The HGame ''Corruption of Champions'' has this as a major game mechanic. Various items and potions can bestow transformations on you, slowly turning you into animal or monstrous forms representative of their origin. "Canine Peppers", for example, subtly alter your physiology into a more... canine form, while "Whisker Fruit" makes you more catlike. Items of opposed species will soon cancel out each other's transformations- and overdosing on certain transformation items will [[ForcedTransformation turn you permanently]] into that animal, resulting in a bad ending for you.
68* In ''VideoGame/DontStarve'', feeding monster meat to pigs causes them to transform into monstrous werepigs. If you play as the pig character Wilba, you can invoke this on yourself.
69* Some raw meat chunks in ''VideoGame/DungeonCrawl'' can cause a random mutation if eaten. They are thankfully labeled as such and prompt a warning if you try to eat it.
70* ''VideoGame/SaGaRPG'' has edible monster meat. In some games, it can turn any character into a monster (opposed by cybernetics/robotic upgrades), and in all titles it allows monsters to grow more powerful and/or become a different type of monster.
71* Monster meat in the ''VideoGame/ShirenTheWanderer'' series transforms you into the monster the meat came from, giving you all of the powers of the original monster. You can also use the meat on enemies by throwing it at them; this can be exploited by throwing meat from TheGoomba. Of course, monsters don't drop this meat normally; you have to kill them with Bufu's Staff, or better, Bufu's Cleaver, neither of which are easy to get.
72* The entire point of ''Videogame/WeHappyRestaurant'' is to serve foods with mutagens and mind control materials in order to draw more customers in and of course unlock their mutation stages, along with the profit to decorate your restaurant.
73* This is the key feature of ''VideoGame/{{Wobbledogs}}''; the mutation of dogs is affected by the food they have eaten. You can unlock more types of food by completing various goals.
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76[[folder:Web Original]]
77* The Website/YouTube channel ''AI Lost Media'' tends to feature this in their videos, with people who eat food often becoming the food itself. This is shown at full force with their [[https://youtu.be/Zrg4t3_PdLM?si=RUeLBE8o-KSsRNxf Pizza Nuggets]] video, with people who consume the titular nuggets eventually turning into [[EldritchAbomination Eldritch Abominations]] made of pizza once they eat too many.
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80[[folder:Western Animation]]
81* An episode of ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'' has Jimmy, Sheen and Carl venture into the Bahama Quadrangle and meet with a mysterious scientist named Dr. Moist. There, they find that he lures people there to feed them a mutagenic seaweed that turns them into seaweed monsters, and only a special antidote that he drinks with his weed can reverse the effects.
82* In ''WesternAnimation/AlienatorsEvolutionContinues'', Wayne ends up spending the series mutating into a new form OncePerEpisode after accidentally eating one of the alien cells in the first episode.
83* In one episode of ''WesternAnimation/AmericanDragonJakeLong'', Jake and his friends are baking muffins. When told to add vanilla, Spud unwittingly pours in a vial of venom extracted from [[MonsterOfTheWeek a demonic]] [[ScaryScorpions scorpion]] (in his defense, it was right next to the vanilla container), and the resulting muffins cause the people who eat them to take on the creature's properties and begin attacking.
84* ''WesternAnimation/CourageTheCowardlyDog'':
85** In the pilot "The Chicken from Outer Space", eating alien eggs causes Eustace to [[TransformationHorror transform into a monstrous chicken man]].
86** Another episode revolves around a [[GiantFood giant carrot]] engineered by the military to make whoever eats it [[MiracleGroMonster grow]] before exploding.
87* ''WesternAnimation/TheCupheadShow'': As a result of taking bites out of Baroness Von Bon Bon's castle and breaking the rules of her world, Cuphead and Mugman are both transformed into sweets; a gummy bear (cup?) and gingerbread man respectively. In a rare occasion of a DownerEnding for the series, they ''don't'' turn back by the end, even after escaping her clutches, and presumably get [[ImAHumanitarian eaten alive by Elder Kettle]].
88* ''WesternAnimation/TheMagicSchoolBus'' shows a RealLife example with carrots. Arnold eats nothing but carrot-based snacks for days and turns orange.
89* In an episode of ''WesternAnimation/ThePowerpuffGirls1998'', a boy transforms into a giant glue monster after accidentally eating a radioactive bug that fell into his tub of glue.
90* In ''WesternAnimation/RandyCunninghamNinthGradeNinja'', [=McFist=] industries debuts "soupsicles", bowls of soup congealed around plastic handles using an additive that Viceroy vehemently warns against consuming more than twice a day. Howard proves why after eating far more than two, and becomes highly addicted before mutating into a flabby monster [[HungryMenace hungry for more soupsicles]].
91* ''WesternAnimation/{{Recess}}'': In "[[Recap/RecessS6E1TheTerrifyingTalesOfRecess The Terrifying Tales of Recess]]" (during the segment "Children of the Cornchip"), Cornchip Girl eats from a bag of "Ye Olde Crisps", an untested brand of corn chips imported from a spooky English town, which cause her to turn into a [[OurWerewolvesAreDifferent werewolf-like]] "[[NotUsingTheZWord monster]]".
92* ''WesternAnimation/TheSimpsons'':
93** Referenced in "[[Recap/TheSimpsonsS3E7TreehouseOfHorrorII Treehouse of Horror II]]", in which Homer attempts to wish on a [[JackassGenie Monkey's Paw]] without it backfiring, and so wishes for a normal turkey sandwich. To cover all his bases, he makes sure to specify that he doesn't want the sandwich to turn him into a turkey when he eats it, among other things.
94** In another episode, Bart has an ImagineSpot where he's a tester for new food products. A new soda turns him into a monster, which he finds cool.
95* ''WesternAnimation/SpongeBobSquarePants'':
96** In "[[Recap/SpongeBobSquarePantsS2E5WormyPattyHype Patty Hype]]", [=SpongeBob=] invents his own Krabby Patties that come in a multitude of colors. While initially popular with the public, a day after [=SpongeBob=] gives ownership of his stand to Mr. Krabs in exchange for the Krusty Krab, several thousand angry customers come to Mr. Krabs demanding refunds after whatever dye [=SpongeBob=] used to make the patties seeped into their skin and tongues.
97** In "[[Recap/SpongeBobSquarePantsS4E18BornToBeWildBestFrenemies Best Frenemies]]", Mr. Krabs and Plankton [[EnemyMine team up]] to stop a new chain of soft drink places from putting the Krusty Krab out of business. After several failed attempts to learn the Kelpshake recipe and why it's so addictive, they finally just buy one and analyze its contents, where Karen tries to warn them of one particular ingredient but gets ignored. Soon after, they see [=SpongeBob=] covered in green fur, apparently the result of said ingredient that led to the restaurants all being shut down, and Mr. Krabs and Plankton end up equally furry not long after.
98** In "[[Recap/SpongeBobSquarePantsS5E9TheKrustySpongeSingASongOfPatrick The Krusty Sponge]]", after a less-than-glowing review of the Krusty Krab that ended with praise for [=SpongeBob=], Mr. Krabs decides to make the Krusty Krab [=SpongeBob=]-themed. Part of this was selling Krabby Patties that had turned yellow from not being kept frozen properly as "Spongy Patties", and the people that eat them get food poisoning and turn yellow and spotted like [=SpongeBob=] himself. Unfortunately for Mr. Krabs, one of the victims of the tainted patties is a health inspector, and he ends up going to court for willfully poisoning his customers.
99* In the ''WesternAnimation/SuperMarioWorld1991'' episode "King Scoopa Koopa", King Koopa begins selling highly addictive egg sandwiches that eventually begin turning his customers into Chickadactyls, whom he then plans to cook and sell to dinosaurs.
100* In the ''WesternAnimation/TeamGalaxy'' episode "Strange Fruit", the protagonists land by mistake on an unknown alien planet, and there a hungry Josh eats one of the local fruits -- despite Brett's protests that the fruit is entirely unknown and thus could be dangerous, Josh deems it safe since the local alien monkeys eat the fruits on the ground. As it turns out, the local fauna only eats the fruits ''after'' they fell from the trees -- because eating a fruit straight from a branch as Josh did causes the eater to transform into a giant replica of said fruit. While at first used an InflatingBodyGag since Josh turns into a massive, orange, warts-covered pear-like-fruit, it slowly delves into the TransformationHorror territory as Josh loses the ability to move by himself, finds himself unable to speak, and starts emitting a powerful stench because he is much too ripe, a.k.a. [[BodyHorror rotting away]]. This ability is also weaponized by the protagonists when fighting off hungry fruit-eating alien monkeys, using the unripe fruits as mutagenic grenades.
101* ''WesternAnimation/TeenTitans2003'': When [[TeamPet Silkie]] is introduced, he eats some of Starfire's alien zorkaberries, which promptly turns him into an unstoppable (though still cuddly) behemoth. [[spoiler:{{Subverted|Trope}} when it turns out that he's just molting.]]
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104[[folder:Real Life]]
105* Some opponents of GMO food fear that this is true whenever food includes "mutations" ([[ArtisticLicenseBiology or even "DNA"]]). Mutations happen spontaneously in all living organisms, allowing for such things as natural evolution. There could be an infinitesimally small chance that not all the vectors used for transgenic modification were integrated into the nuclei of the GMO, but the stomach produces enzymes that break down DNA.
106* Eating too many carrots, or anything else with beta-carotene, can cause your body to dump the pigment into your skin cells rather than metabolise it into Vitamin A (which is seriously poisonous in excessive amounts), making you [[AmazingTechnicolorPopulation carrot-colored]]. [[http://www.independent.co.uk/news/too-much-sunny-delight-turns-girls-skin-yellow-1134703.html Drinkers of Sunny Delight have also suffered this]].
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