TL;DR Vitamin A is essential for healthy eyes, skin, mucous membranes, and the immune system. Early deficiency often causes poor night vision and dry eyes. Because vitamin A is a fat-soluble vitamin, people with poor fat digestion, gallbladder problems, or difficulty converting beta-carotene may be at higher risk. Too much vitamin A can be toxic, … Continue reading Vitamin A: Benefits, Deficiency Symptoms, Food Sources, and Safety