whoDietary Reference Intakes for Vitamin A(Retinol activity equivalents) in WHO(World Health Organization)

Men

Age R
0 - 1 years 350 μg
1 - 9 years 400 μg
10 - 19 years 500 ~ 600 μg
20 - 59 years 600 μg
60 years and abobe 600 μg

Women

Age R
0 - 1 years 350 μg
1 - 9 years 400 μg
10 - 19 years 500 μg
20 - 59 years 500 μg
60 years and abobe 500 μg

Pregnant Women in 1st Trimester

Age R
10 - 19 years 600 μg
20 - 59 years 600 μg
60 years and abobe 600 μg

Pregnant Women in 2nd Trimester

Age R
10 - 19 years 600 μg
20 - 59 years 600 μg
60 years and abobe 600 μg

Pregnant Women in 3rd Trimester

Age R
10 - 19 years 600 μg
20 - 59 years 600 μg
60 years and abobe 600 μg

Lactating Women, first 6 months

Age R
10 - 19 years 850 μg
20 - 59 years 850 μg
60 years and abobe 850 μg

Lactating Women, after 6 months

Age R
10 - 19 years 850 μg
20 - 59 years 850 μg
60 years and abobe 850 μg


Source: Food and Agriculture Organization (1988) Requirements of Vitamin A, Iron, Folate and Vitamin B12, Report of a Joint FAO/WHO Expert Consultation, FAO Food and Nutrition Series 23, FAO, Rome. World Health Organization (1985) Enegy and Protein Requirements, Report of a Joint FAO/WHO/UNU Expert Consulation, WHO Technical Report Series 724, WHO, Geneva. Beaton GH, Patwardhan VN (1976) Physiological and practical considerations of nutrient function and requirements. In : Nutrtion in Preventive Medicine : the Major Deficiency Syndromes, Epidemiology, and Approaches to Control (Beaton GH, Bengoa JM, eds), p.445-81, WHO, Geneva.