Following the plan may drastically limit many fruits, whole grains, and some vegetables.
Many people following keto aim for 20 to 50 grams (g) of net carbohydrates per day. (Net carbs, though not an official nutrition term, can be calculated by taking the total carbohydrates minus fiber and sugar alcohols, per Atkins.) The idea is to switch your body into ketosis, a state where it burns fat for fuel rather than carbohydrates (its preferred and easy-to-access source of energy). Following the plan may drastically limit many fruits, whole grains, and some vegetables.