If Goku goes long enough without food he becomes weak enough to lose to Yamcha. So Saiyan metabolism has to be amazingly bad. No fat storage or anything.
But Saiyan digestion has to be amazingly good or everyone Goku has ever lived with would be up to their necks in waste products.
edited 17th Jul '15 7:42:12 AM by unnoun
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He's never shown eating them (Occam's Razor) and it was six days before the first senzu.
Plus still that three days in the android arc with no eating.
Oh, and Gohan went for about two days without food in the Boo arc and was still in fighting shape.
Depends on how often Namekians need water.
edited 17th Jul '15 8:02:48 AM by Saiga
So I just re-called something:
In Yo Son Goku And His Friends Return, Piccolo (or was it Vegeta) was yelling at Goten and Trunks to remember to sense the enemies Ki in order to anticipate their attacks, which is interesting.
Obviously, sensing the ki of powerful opponents lets them know when an enemy is coming, but I never considered that they use it to anticipate enemy attacks in the heat of battle.
Too bad high power levels started to dictate everything, because being able to do this is only useful if you have a high Power Level yourself, since all the skill in the world is useless if your enemy is so fast and strong he can curb stomp you in one hit.
One Strip! One Strip!

Do....we really want an answer to that question?
One Strip! One Strip!