| NRV | 2.5 µg |
|---|---|
| 15% NRV (minimum for most claims) | 0.38 µg |
| Example ingredient form | cyanocobalamin, hydroxocobalamin or methylcobalamin |
| Authorised claims (examples) | 7 |
Showing Vitamin B12 in the nutrient table
Give the amount of Vitamin B12 per daily dose, in µg, and the %NRV. A daily dose of 25 µg works out as 25 ÷ 2.5 × 100 = 1000% NRV. Check other doses with our %NRV calculator.
The nutrient table names the nutrient. The ingredients list names the form used, such as cyanocobalamin.
Is there a maximum dose?
The UK has no legal maximum for Vitamin B12 in food supplements. The Department of Health and Social Care advice, published on the NHS website, is: 2 mg (2,000 µg) or less a day from supplements is unlikely to cause harm.
Authorised health claims
These are examples of authorised claims on the GB nutrition and health claims register. Use them word for word or with wording that means exactly the same, and only when the daily dose provides at least 15% of the NRV (0.38 µg).
- “Vitamin B12 contributes to normal energy-yielding metabolism”
- “Vitamin B12 contributes to normal functioning of the nervous system”
- “Vitamin B12 contributes to normal psychological function”
- “Vitamin B12 contributes to normal red blood cell formation”
- “Vitamin B12 contributes to the normal function of the immune system”
- “Vitamin B12 contributes to the reduction of tiredness and fatigue”
- “Vitamin B12 has a role in the process of cell division”
Check the full register entry before you print: some claims have extra conditions. See our health claims guide and how to check a claim on the register.
Labelling notes
Vegan products often feature B12. Common doses of 25–1000 µg give %NRV figures of 1000% to 40000%, which is correct.
Check before you print. Claims and dose advice are summarised from the GB nutrition and health claims register and the NHS vitamins and minerals pages, as of October 2026. Confirm your final wording against the register.