Originally Posted by
flathead
"See carbs don't fatten us when UV light is present. Carbs fatten mammals at the end of summer/fall when UV light drops off a cliff. This is because we need strong UV light to drive electron flow from carbs within mitochondria. Without the UV, carb electrons leak, and produce more free radicals. This turns insulin ON to bring more glucose into cells to pack on fat. Overtime, as a mammals fat stores are filling up and swelling, and the cold hits, this is the signal for insulin resistance which does 2 things: 1) prevents more glucose from entering the cell and 2) keeps blood sugar high which acts as antifreeze. Then, the problem goes away when the mammal hibernates and activates the cold adapted/ketogenic pathway for winter."
Thanks for that. It is a very nice and simple technical analogy. This is a key point (as well as the post in general).