Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Vitamin A

Vitamins are substances that your body needs to grow and develop normally. Vitamin A plays a role in your:

  • Vision
  • Bone growth
  • Reproduction
  • Cell functions
  • Immune system

Vitamin A is an antioxidant. It can come from plant or animal sources. Plant sources include colorful fruits and vegetables. Animal sources include liver and whole milk. Vitamin A is also added to foods like cereals.

(Read more)

Results 1 - 10 of 4,051 for vitamin a
  1. Vitamin D Deficiency (National Library of Medicine)  
    What is vitamin D deficiency? Vitamin D deficiency means that your body is not getting enough vitamin D to stay healthy. Why do I need vitamin D and how do I get it? Vitamin ...
  2. Vitamin A (National Library of Medicine)  
    Vitamins are substances that your body needs to grow and develop normally. Vitamin A plays a role in your: Vision Bone growth Reproduction Cell functions Immune system Vitamin A is an antioxidant. It can come from ...
  3. B Vitamins (National Library of Medicine)  
    The B vitamins are: B1 (thiamine) B2 (riboflavin) B3 (niacin) B5 (pantothenic acid) B6 B7 (biotin) B12 Folic acid These vitamins help the process your body uses to get ...
  4. Vitamin D (National Library of Medicine)  
    Vitamins are substances that your body needs to grow and develop normally. Vitamin D helps your body absorb calcium. Calcium is ... main building blocks of bone. A lack of vitamin D can lead to bone diseases such as ...
  5. Vitamin E (National Library of Medicine)  
    Vitamins are substances that your body needs to grow and develop normally. Vitamin E is an antioxidant. It plays a role ... immune system and metabolic processes. Good sources of vitamin E include: Vegetable oils Margarine Nuts and seeds ...
  6. Vitamin K (National Library of Medicine)  
    Vitamins are substances that your body needs to grow and develop normally. Vitamin K helps your body by making proteins for ... blood clotting. If you don't have enough vitamin K, you may bleed too much. Newborns have ...
  7. Vitamins (National Library of Medicine)  
    Vitamins are substances that your body needs to grow and develop normally. There are 13 vitamins your body needs. They are: Vitamin A B vitamins (thiamine, riboflavin, niacin, pantothenic acid, ...
  8. Vitamin C (National Library of Medicine)  
    Vitamins are substances that your body needs to grow and develop normally. Vitamin C is an antioxidant. It is important for ... promotes healing and helps the body absorb iron. Vitamin C comes from fruits and vegetables. Good sources ...
  9. Vitamin B Test What is a vitamin B test? B vitamins are nutrients that your body needs to work well and stay healthy. There are eight different types. A ... t have symptoms. Why do I need a vitamin B test? You may need a vitamin B ...
  10. Vitamin D Test What is a Vitamin D Test? A vitamin D test measures the level of vitamin D in your blood to make sure you have enough for ... should be tested. Why do I need a vitamin D test? Your provider may order a vitamin ...
previous · 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · next