| NRV | 1.1 mg |
|---|---|
| 15% NRV (minimum for most claims) | 0.17 mg |
| Example ingredient form | thiamin hydrochloride |
| Authorised claims (examples) | 4 |
Showing Thiamin in the nutrient table
Give the amount of Thiamin per daily dose, in mg, and the %NRV. A daily dose of 1.1 mg works out as 1.1 ÷ 1.1 × 100 = 100% NRV. Check other doses with our %NRV calculator.
The nutrient table names the nutrient. The ingredients list names the form used, such as thiamin hydrochloride.
Is there a maximum dose?
The UK has no legal maximum for thiamin in food supplements. The Department of Health and Social Care advice, published on the NHS website, is: 100 mg 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 (0.17 mg).
- “Thiamin contributes to normal energy-yielding metabolism”
- “Thiamin contributes to normal functioning of the nervous system”
- “Thiamin contributes to normal psychological function”
- “Thiamin contributes to the normal function of the heart”
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
You can call it thiamin or vitamin B1 on the label; using both, such as “Thiamin (vitamin B1)”, helps shoppers.
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.