How would a humanoid race differ physiologically if it stored excess dietary calories in a form other than fat?

I'm thinking primarily in terms of the macronutrients, carbohydrates and proteins.

I know that fats are 9 calories per gram and both proteins and carbohydrates are 4 calories per gram, which makes them less fattening to eat, but it also makes them less efficient methods of caloric storage.

I believe this would mean that body weight would fluctuate over twice as easily, but what other physiological changes would accompany something like this?

Would a body packed with carb-storage be more crystalline than squishy? Would a protein-storage body just be a big slab of flesh?

Thanks.

posted about 7 years ago

KoaxialKable‭

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