Riboflavin is also known as vitamin B2.
Contributes to the maintenance of normal red blood cells.
Contributes to the reduction of tiredness and fatigue.
Contributes to the maintenance of normal vision.
The amount of riboflavin adults (19-64 years) need is approx:
1.3 mg a day for men
1.1 mg a day for women
Riboflavin cannot be stored in the body, so you need it in your diet every day. You should be able to get all the vitamin B2 from a balanced and varied diet.
The Department of Health advice is that taking 40mg or less a day of riboflavin is unlikely to cause any harm.
Source: www.nhs.uk (Next review due 03/03/2020)