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I thought this too, but I've also seen speculation that fructose specifically triggers the body to be more inclined to store blood sugar as fat. If you think a

I thought this too, but I've also seen speculation that fructose specifically triggers the body to be more inclined to store blood sugar as fat. If you think about it you can imagine an evolutionary just-so story for it. When protohumans encountered fruit, it was usually in a large quantity that couldn't be easily stored. Best to gorge and get chubby for later.

qeternity 4y ago
It largely has to do with different metabolic pathways for fructose vs glucose. Glucose can be metabolized in many places in the body, including directly in your muscles (glycogen) whereas fructose can only be metabolized in the liver.
- dmix 4y ago
  Hummingbirds adapted to use fructose for energy production just like glucose: > Now new research from the University of Toronto Scarborough shows they are equally adept at burning both glucose and fructose, which are the individual components of sugar; a unique trait other vertebrates cannot achieve.\ > From an evolutionary perspective the findings make perfect sense, says Welch. Whereas humans evolved over time on a complex diet, hummingbirds evolved on a diet rich in sugar. "Hummingbirds are able to move sugar from their blood to their muscles at very fast rates, but we don't yet fully understand how they are able to do this," he says. https://www.sciencedaily.com/releases/2013/12/131205165823.htm https://www.sciencedaily.com/releases/2013/12/131205165823.h...
  - qeternity 4y ago
    > Hummingbirds adapted to use fructose for energy production just like glucose. And fish evolved to respirate oxygen from water…what’s the point?