Vitamin B2 (Riboflavin) is essential for the following body functions:
| Food / 100g | Amount (mg) |
| Yeast extract | 11.9 |
| Grapenuts | 1.5 |
| Nori seaweed, dried | 1.3 |
| Bran flakes, oat bran flakess | 1.3 |
| Vegetable pate | 1.3 |
| Tomato sauce for pasta | 0.5 |
| Life Stage Group | RDA/AI* mg / day |
Upper Limit mg / day |
| Infants 0-6 months 7-12 months |
0.3* 0.4* |
Not determinable Not determinable |
| Children 1-3 years 4-8 years |
0.5 0.6 |
Not determinable Not determinable |
| Males 9-13 years 14-18 years 19 - >70 years |
0.9 1.3 1.3 |
Not determinable Not determinable Not determinable |
| Females 9-13 years 14-18 years 19 - >70 years |
0.9 1.0 1.1 |
Not determinable Not determinable Not determinable |
| Pregnancy <19 years 19 - >50 years |
1.4 1.4 |
Not determinable Not determinable |
| Lactation <19 years 19 - >50 years |
1.6 1.6 |
Not determinable Not determinable |
RDA = Recommended Dietary Allowances
AI* = Adequate Intakes
UL = Upper Limit
A deficiency of vitamin B2 can be due to:
Signs and symptoms of vitamin B2 deficiency include
A deficiency may also cause the eyes to become bloodshot, itchy, watery and sensitive to bright light.
An excess of vitamin B2 is not harmful as it is excreted.