If a regular weight person and an obese person were left on a desert island with no food, would the obese person live a lot longer bc they have stored up energy as fat? Or does it not work like that?
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The fat person would have the advantage, but with *no* food you’d expect some deficiency of a vitamin, mineral, or amino acid to still kill them, so that could mitgate how much longer they live.
The more that they can avoid a deficiency in one of those vital nutrients, the longer the life-span gap would be once it is more about just chemical energy. (e.g. if they can eat a small amount of food, or are given a ‘multivitamin’ or similar supplement).
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You could argue for some 2ndary effects, like maybe the obese person will have a harder time constructing a shelter or treking to find water. So it is possible that due to circumstances like that the regular weight person might live longer, but that is sort of not answering the spirit of your question.
If calories are the problem, then the fat person can go longer without them.
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