Originally Posted by
andr0id
We're saying the same thing I think aside from the idea of completely burning through glycogen before you can burn fat.
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Glucose is virtually the sole fuel for the human brain, except during prolonged starvation. The brain lacks fuel stores and hence requires a continuous supply of glucose. It consumes about 120 g daily"
Each Organ Has a Unique Metabolic Profile - Biochemistry - NCBI Bookshelf