Sooner or later they'd overdose on fat-soluble vitamins, which can have unpleasant results. How soon depends on how much they're getting from other sources. Stan uses ADEK supplements meant to be mixed with fatty food as fortification in his buttermints. I think each one has around 1/4 the recommended daily allowance, so eating several is safe.
Stan eats them by the handful for two reasons. One, he can't store nutrients in fat very well because he can't keep the fat on. Two, many superpowers -- and especially the more physical ones -- burn through nutrients other than just calories. Vitamins are used for specific functions in the body, including damage repair. So a superhero needs more than usual.
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dancing_serpent
Well...
Date: 2017-07-24 05:16 am (UTC)Stan eats them by the handful for two reasons. One, he can't store nutrients in fat very well because he can't keep the fat on. Two, many superpowers -- and especially the more physical ones -- burn through nutrients other than just calories. Vitamins are used for specific functions in the body, including damage repair. So a superhero needs more than usual.