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BestCapsules

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Say what you want help with. The finder shows what the GB register lets any seller claim for it, what the register assessed and refused, and the cheapest capsules per capsule for each ingredient. It quotes; it never advises.

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Where the register allows less than sellers suggest

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Name it and the finder says whether the register authorises any claim for it for your goals, or refused one, or has never assessed it.

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Seller-stated only: vegan means the seller says vegan.

Thyroid and Focus and Immunity

14 capsules across 16 ingredients

Thyroid. Only iodine and selenium hold authorised register wording about the thyroid, quoted exactly on their pages. Thyroid conditions are diagnosed and managed by a GP, and the British Thyroid Foundation is the specialist charity.

Focus. Some nutrients hold register claims relating to normal cognitive or psychological function, quoted exactly on their pages. The wording is precise and worth reading as written; anything beyond it is marketing, not authorised claim.

Immunity. This page gathers ingredients whose GB register claims relate to the normal function of the immune system, with the exact authorised wording quoted on each ingredient page. Anything not authorised may not be claimed by sellers, and we quote that status too. A balanced diet, sleep and vaccination advice from the NHS come before any capsule.

Nothing here is medical advice. The wording is the GB register's, quoted exactly; whether a product qualifies to use it is the seller's responsibility. Speak to a GP or pharmacist before taking a supplement, especially if you are pregnant, take medicines or have a diagnosed condition. Wording from the GB nutrition and health claims register; mapping reviewed 4 September 2026.

Holds an authorised claim

Vitamin C

2 authorised claims · 4 capsules · ingredient page
  • “Vitamin C contributes to maintain the normal function of the immune system during and after intense physical exercise” · Immunity
  • “Vitamin C contributes to the normal function of the immune system” · Immunity

All 4 vitamin c capsules

Zinc

2 authorised claims · 3 capsules · ingredient page
  • “Zinc contributes to the normal function of the immune system” · Immunity
  • “Zinc contributes to normal cognitive function” · Focus

Not authorised for thyroid: the register refused 1 claim there.

Vitamin B12

1 authorised claim · 2 capsules · ingredient page
  • “Vitamin B12 contributes to the normal function of the immune system” · Immunity

Vitamin B6

1 authorised claim · 2 capsules · ingredient page
  • “Vitamin B6 contributes to the normal function of the immune system” · Immunity

Iron

3 authorised claims · 1 capsule · ingredient page
  • “Iron contributes to the normal function of the immune system” · Immunity
  • “Iron contributes to normal cognitive function” · Focus
  • “Iron contributes to normal cognitive development of children” · Focus

Assessed by the register and not authorised

The register looked at claims for these relating to thyroid and focus and immunity and turned them down. Sellers may not make them. Prices are shown for ingredients you named; the rest link to their register page.

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