Here’s a puzzle that’s bothered me lately:
A gram of glucose should raise your blood glucose by 17 mg/dl:
1,000 mg / 56 deciliters = 17.8 mg/dl
Yet eating a gram of carbohydrate only raises BG by 4 mg/dl
4 mg/dl * 56 deciliters = 0.224 grams
...so one gram of carbohydrate == 0.224 grams of glucose?
Evidently the body consumes at least 150 grams of glucose/day:
about 100 g of glucose/d are irreversibly oxidized by the brain from the age of 3–4 y onward. However, this excludes recycled carbon, gluconeogenic carbon, for example from glycerol, and it does not account for glucose used by other non-CNS tissues. For example, in the adult, muscle and other non-CNS account for an additional 20–30 g of glucose daily. For this reason a safety margin of 50 g/d is arbitrarily added to the value of 100 g/d
...so, in order to supply the 150 grams of glucose, I need to consume at least 600 grams of carbohydrate per day?
At a maximum rate of 60 grams of carbohydrate/hour, looks like I'd better get busy...