The minimum number of grams of carbohydrate, per day, humans must consume to avoid ketosis is 50-100 grams.
What is ketosis?
- Ketosis is a metabolic state characterized by elevated levels of ketone bodies in the blood or urine.
- Physiological ketosis is a normal response to low glucose availability, such as low-carbohydrate diets or fasting, that provides an additional energy source for the brain in the form of ketones.
- In physiological ketosis, ketones in the blood are elevated above baseline levels, but the body's acid–base homeostasis is maintained.
- Trace levels of ketones are always present in the blood and increase when blood glucose reserves are low and the liver shifts from primarily metabolizing carbohydrates to metabolizing fatty acids.
- This occurs during states of increased fatty acid oxidation such as fasting, starvation, carbohydrate restriction, or prolonged exercise.
- When the liver rapidly metabolizes fatty acids into acetyl-CoA, some acetyl-CoA molecules can then be converted into ketone bodies.
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