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  1. Vitamin A: What It Is and How Much You Need

    Nov 9, 2022 · Vitamin A strengthens your immune system by supporting white blood cells and the mucus membranes in your lungs, intestines and urinary tract. This helps you ward off infection and …

  2. Vitamin A: Benefits, Deficiency, Toxicity, and More - Healthline

    Apr 24, 2023 · Vitamin A is essential for your health. It supports cell growth, immune function, fetal development, and vision. Perhaps one of the best-known functions of vitamin A is its role in vision …

  3. Vitamin A - Mayo Clinic

    Apr 17, 2025 · Vitamin A is a nutrient the body uses to support growth, vision and cell function. It's also called retinol or retinoic acid. Vitamin A has antioxidant properties. Antioxidants are substances that …

  4. Vitamin A - Wikipedia

    Vitamin A is a fat-soluble vitamin that is an essential nutrient. The term "vitamin A" encompasses a group of chemically related organic compounds that includes retinol, retinyl esters, and several …

  5. Vitamin A and Carotenoids - Health Professional Fact Sheet

    Vitamin A is involved in immune function, cellular communication, growth and development, and male and female reproduction [1-3]. Vitamin A supports cell growth and differentiation, playing a critical …

  6. Vitamin A - The Nutrition Source

    Vitamin A also stimulates the production and activity of white blood cells, takes part in remodeling bone, helps maintain healthy endothelial cells (those lining the body’s interior surfaces), and regulates cell …

  7. Vitamin A: MedlinePlus Medical Encyclopedia

    Jan 21, 2025 · Vitamin A helps form and maintain healthy teeth, skeletal and soft tissue, mucus membranes, and skin. It is also known as retinol because it produces the pigments in the retina of …