To prevent the human body from breaking down proteins for use as
energy to fuel the brain andmuscles, and to prevent long-term ketosis
that may have deleterious health consequences, humans must consume
50–100 g, or about 1/5–1/4 lb of carbohydrates per day. Most
societies obtain that requirement through the consumption of foods
such as plants, insects, shellfish, raw meats, and, in some cases, the
stomach contents of large mammals