Vitamin A Deficiency

Several medical and dietary conditions can block vitamin A absorption even when dietary intake of vitamin A is adequate. Gallbladder problems or removal impair fat-soluble vitamin absorption, including vitamin A. Gastric bypass surgery reduces vitamin A absorption by decreasing the absorptive surface area of the digestive tract. Liver dysfunction reduces the body's capacity to process vitamin A, and alcohol consumption directly worsens this impairment. Inflammatory gastrointestinal conditions such as IBS and colitis limit vitamin A absorption by damaging the digestive tract. Antibiotic use can damage the digestive system and further impair nutrient absorption.