Vitamin A
Adults need 700 micrograms (men) or 600 micrograms (women) of vitamin A a day, which diet normally provides.
Short answer Adults need 700 micrograms (men) or 600 micrograms (women) of vitamin A a day, which diet normally provides. Do not take vitamin A supplements, or eat liver, if you are pregnant.
What it does
Vitamin A contributes to normal vision, skin and immune function.
Too much
More than 1.5mg a day over years may weaken bones. Check multivitamins and fish liver oils together.
Related pages
- Vitamin EAdults need about 4mg (men) or 3mg (women) of vitamin E a day, easily met from plant oils, nuts and seeds.
- Vitamin K2Vitamin K contributes to normal blood clotting and the maintenance of normal bones.
- Calcium supplementsAdults need 700mg of calcium a day, which dairy, fortified alternatives, bread and green vegetables usually cover.
- Zinc supplementsAdults need 9.5mg (men) or 7mg (women) of zinc a day.
Keep exploring
- Hair, skin and nail vitamins
- Guides
- Collagen types 1, 2 and 3
- Multivitamins for women
- Meal replacement shakes
- Collagen supplements
Questions people ask
What should I know about vitamin A?
Adults need 700 micrograms (men) or 600 micrograms (women) of vitamin A a day, which diet normally provides.
Can I take this with medication?
Ask a pharmacist or GP first; some supplements interact with medicines.
Do supplements replace a balanced diet?
No. They are meant to add to a varied diet, not stand in for one.
Sources
- NHS: Vitamins and minerals (opens in a new tab)
- NHS: Vitamins, supplements and nutrition in pregnancy (opens in a new tab)
Checked 9 October 2026.