Nutrient Absorption in the GI Tract Cheat Sheet Nursing Vitamin & Mineral Absorption Micronutrients: Types, Functions, Benefits Physiology of Intestinal Absorption and Secretion The gastrointestinal tract includes your mouth, stomach, small intestines and large intestines. Approximately 92 to 97 percent of the nutrients consumed, which includes carbohydrates, protein, fat, fluid, vitamins and minerals, are absorbed through the GI tract, says Sylvia Escott-Stump, a registered dietitian and pub
