While in 1993 the European Scientific Committee for Food (36) set population reference intakes (PRI) for vitamin C, European nutrition societies, like the ones in Germany, Austria and Switzerland (62), defined recommended dietary allowance (RDA) values for vitamin C in 2000:

Age	Males: mg/day	Females: mg/day
0–12 months	50	50
1–3 years	60	60
4–6 years	70	70
7–9 years	80	80
10–12 years	90	90
13–17 years	100	100
18 years and older	100	100
Pregnant (from the 4th month)	-	110
Breast-feeding	-	150

In 2000, the U.S. Food and Nutrition Board revised the recommended dietary allowance (RDA) values for vitamin C upward, based primarily on the prevention of deficiency disease, rather than the prevention of chronic disease and the promotion of optimum health (17):

Life Stage	Age	Males: mg/day	Females: mg/day
Infants	0–6 months	40 (AI)	40 (AI)
Infants	7–12 months	50 (AI)	50 (AI)
Children	1–3 years	15	15
Children	4–8 years	25	25
Children	9–13 years	45	45
Adolescents	14–18 years	75	65
Adults	19 years and older	90	75
Smokers	19 years and older	125	110
Pregnancy	18 years and younger	-	80
Pregnancy	19 years and older	-	85
Breast-feeding	18 years and younger	-	115
Breast-feeding	19 years and older	-	120

The recommended intake for smokers is 35 mg/day higher than for non-smokers, because smokers are under increased oxidative stress from the toxins in cigarette smoke and generally have lower blood levels of vitamin C (17).

 

For a detailed overview of recommended daily intakes (PRIs/RDAs) of vitamins and minerals for adults derived from different countries and organizations see PDF.