Fructose acts as a survival mechanism in animals to increase energy, store water, and induce insulin resistance.

“they use fructose to store water and we can talk about that and they use it to become insulin resistant insulin resistance is a survival mechanism whereby increasing blood glucose and preventing glucose from taking up in the skeletal muscle it preserves it for the brain which is what you want to do if you don't have enough food around you want to be able to think so you can escape predators and so forth so it was a survival tool to increase energy”

“so what they do is they like a hibernating animal will start eating a lot of fruit in the fall to increase its weight and increase induces insulin resistance it gets hungry it drops its metabolism so that most of the energy it eats goes into fat and the same thing with a long distance migrating bird they'll start eating fruit to get the fructose and so this is a very common pattern and it's driven by that atp depletion”