Fructose served as a survival nutrient by aiding in energy storage, water storage, and promoting insulin resistance to preserve glucose for the brain.

“fructose was a incredible survival nutrient in the setting of near starvation as i mentioned what we're learning is all these animals use fructose they either get it from their diet or they make it in their body and they use that to help them survive and we can talk about it but it involves not just storing energy but 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”