Vitamin A - Mayo Clinic
www.mayoclinic.org › drugs-supplements-vitamin-aNov 13, 2020 · The recommended daily amount of vitamin A is 900 micrograms (mcg) for adult men and 700 mcg for adult women. Evidence Research on oral vitamin A for specific conditions shows: Acne. Large doses of oral vitamin A supplements don't appear to affect acne. Age-related macular degeneration.