Eli5: the larger the creature the slower the metabolism; so why do our metabolisms speed up when we gain weight?

Question

Eli5: the larger the creature the slower the metabolism; so why do our metabolisms speed up when we gain weight?

In: 4

Answer 1

As the body size increases, you lose less heat. This is due to surface area, but every cell in animal bodies is like a little light source. It requires energy to keep itself alive.

So if you gain fat, those cells require energy to keep alive. Storage isn’t free. Its while your TDEE drops as you weigh less.