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Vitamins Recommended daily intake
Vitamins informational pages
Over dosage (mg or µg/d)
Biotin
(B-complex)
30 µg Biotin in food and as a supplement No information found
Folate
(B-complex)
400 µg Folate in food and as a supplement Doses larger than 400 µg may cause anaemia and may mask symptoms of a vitamin B12 deficiency
Vitamin A 600 µg Vitamin A in food and as a supplement Extremely high doses (9000 mg) can cause dry, scaly skin, fatigue, nausea, loss of appetite, bone and joint pains and headaches
Vitamin B1 (thiamin)
1,4 mg Vitamin B1 in food and as a supplement No toxic effects resulting from high doses have been observed
Vitamin B2 (riboflavin)
1,6 mg Vitamin B2 in food and as a supplement Doses higher than 200 mg may cause urine colour alteration
Vitamin B3 (niacin)
18 mg Vitamin B3 in food and as a supplement Doses larger than 150 mg may cause problems ranging from facial flushing to liver disease
Vitamin B5 (patothenic acid)
6 mg Vitamin B5 in food and as a supplement Dose should not exceed 1200 mg; this may cause nausea and heartburn
Vitamin B6 (pyridoxine)
2 mg Vitamin B6 in food and as a supplement Doses larger than 100 mg may cause numbness and tingling in hands and feet
Vitamin B12 (cobalamine)
6 µg Vitamin B12 in food and as a supplement Doses larger than 3000 µg may cause eye conditions
Vitamin C (ascorbic acid)
75 mg Vitamin C in food and as a supplement No impacts of over dose have been proven so far
Vitamin D (cholecalciferol)
5 µg Vitamin D in food and as a supplement Large doses (50 µg) obtained form food can cause eating problems and ultimately disorientation, coma and death
Vitamin E (tocopherol)
10 mg Vitamin E in food and as a supplement Doses larger than 1000 mg cause blood clotting, which results in increased likelihood of haemorrhage in some individuals
Vitamin K 80 µg Vitamin K in food and as a supplement Large doses of one form of vitamin K (menadione or K3) may result in liver damage .
