Daily intake

Over dosage (mg or mcg/d)

Biotin (B-complex)

30mcg

No information found

Folate (B-complex)

400 mcg

Doses larger than 400 mcg may cause anaemia and may mask symptoms of a vitamin B12 deficiency

Vitamin A

600 mcg

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

No toxic effects resulting from high doses have been observed

Vitamin B2 (riboflavin)

1,6 mg

Doses higher than 200 mg may cause urine colour alteration

Vitamin B3 (niacin)

18 mg

Doses larger than 150 mg may cause problems ranging from facial flushing to liver disease

Vitamin B5 (patothenic acid)

6 mg

Dose should not exceed 1200 mg; this may cause nausea and heartburn

Vitamin B6 (pyridoxine)

2 mg

Doses larger than 100 mg may cause numbness and tingling in hands and feet

Vitamin B12 (cobalamine)

6 mcg

Doses larger than 3000 mcg may cause eye conditions

Vitamin C (ascorbic acid)

75 mg

No impacts of over dose have been proven so far

Vitamin D (cholecalciferol)

5 mcg

Large doses (>50 mcg) obtained form food can cause eating problems and ultimately disorientation, coma and death

Vitamin E (tocopherol)

Doses larger than 1000 mg cause blood clotting, which results in increased likelihood of haemorrhage in some individuals

Vitamin K

80 mcg

Large doses of one form of vitamin K (menadione or K3) may result in liver damage or anaemia