Epidemiologie

United Kingdom and Germany

Dietary intakes of vitamin C

• Adult men 87 - 76 mg/day
• Adult women 75 - 72 mg/day
• Elderly men 72 (SD 61) mg/day
• Elderly women 68 (SD 60) mg/day

United States

• National Health and Nutrition Examination Survey
• Median consumption of vitamin C from foods in 1988-91
• 73 and 84 mg/day in men and women [12]
• 25-30 % of the US population
• Less than 2.5 servings of fruit and vegetables daily
• U.S. National Center for Health Statistics
• Biannual National Health and Nutrition Examination Survey (NHANES)
• Assess the health and nutritional status of adults and children
• Results are reported as "What We Eat In America"
• 2013-2014 survey reported [12]
• Adults ages 20 years and older
• Men consumed on average 83.3 mg/d
• Women 75.1 mg/d [12]
• This means that half the women and more than half the men are not consuming the RDA for vitamin C
• About 30% of adults consumed a vitamin C dietary supplement
• Total consumption was 300- 400 mg/d [12]

Latin American children in the United States

• Less than 15 percent consumed the recommended intake of fruits and vegetables
• World Health Organization (WHO) dietary goal of 400 g
• Aimed to provide sufficient vitamin C
• 1970 Food and Agriculture Organization of the United Nations (FAO)/WHO guidelines
• Approximately 20-30 mg/day

India

• Available supply of vitamin C is 43 mg/capita/day
• Different states of India 27 - 66 mg/day
• Low-income children 8.2 mg/day of vitamin C
• Well-to-do group of children 35.4 mg/day

China

• 20-27 mmol/l for apparently healthy adolescent boys and girls in China

Gambia

• 3-54 mmol/l (median 14 mmol/l) for similarly aged Gambian nurses

Rural district in Northern Thailand

• 17-118 mmol/l, median 44 mmol/l in adults

Světový význam

• It is on the World Health Organization's List of Essential Medicines
• As one of the most effective and safe medicines needed in a health system [12]