Friday, March 30, 2018

Does our physiology prefer fat or sugar as it's primary source of energy?

Interesting question, hotly debated these days.

We know healthy blood sugar level falls into a relatively narrow invariant range (becoming "Paleo" doesn't change it).

We know dietary sugar in the blood does not interfere with the delivery of fat from the blood to the cells, but dietary fat in the blood dramatically interferes with the delivery of sugar from the blood to the cells.

We also know the body has two immediate invariant needs for "fuel", oxygen and sugar. A very short time without either and we're dead.

As blood sugar drops below normal range we begin to get into trouble...initially basic functioning becomes difficult, if they continue to drop we lose consciousness, and if it drops further death will result:

https://www.quora.com/What-would-happen-if-your-blood-sugar-is-zero

Blood lipid levels are typically associated with levels of cholesterol, the building block fat, where according to this article there are no immediate pronounced effects to low levels, and long term effects are as yet not all that clear:

https://onlinelibrary.wiley.com/doi/pdf/10.1002/lite.201000070

Serum triglycerides are the fats burned as energy, this article says among other things there are no particular day to day symptoms associated with either high or low levels of triglycerides.

https://www.belmarrahealth.com/low-triglycerides-causes-symptoms/

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