how much vitamin should an adult male be taking daily
Vitamin A Requirements for Adults. Adult men aged 19 and older should consume 900 micrograms of vitamin A per day. The daily requirement of the vitamin for adult women aged 19 and older is 700 micrograms.
Recommended Daily Allowances. Adult men and women, including pregnant or nursing women, should consume 15 micrograms of vitamin D daily, according to the Institute of Medicine's Food and Nutrition Board. Vitamin D intake can also be measured in International Units; by this measure, adults require 600 International Units daily. Seniors over 70 years of age have a higher RDA -- 800 International Units, or 20 micrograms, of vitamin D each day.