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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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Fertility and Testosterone and Thyroid and Focus

1182 capsules across 34 ingredients

Fertility. Ingredients here hold register claims relating to fertility and reproduction, quoted exactly. UK guidance on folic acid before and during early pregnancy is the best-established nutritional advice in this area, and Fertility Network UK below offers wider support.

Testosterone. Only a small number of ingredients hold register claims mentioning testosterone, and this page quotes them exactly. Claims in this category are heavily marketed well beyond what the register authorises; the split below shows the line.

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.

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

Zinc

3 authorised claims · 249 capsules · ingredient page
  • “Zinc contributes to normal fertility and reproduction” · Fertility
  • “Zinc contributes to normal cognitive function” · Focus
  • “Zinc contributes to the maintenance of normal testosterone levels in the blood” · Testosterone

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

All 249 zinc capsules

Folate

1 authorised claim · 138 capsules · ingredient page
  • “Folate contributes to maternal tissue growth during pregnancy” · Fertility

All 138 folate capsules

Selenium

2 authorised claims · 95 capsules · ingredient page
  • “Selenium contributes to normal spermatogenesis” · Fertility
  • “Selenium contributes to the normal thyroid function” · Thyroid

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

All 95 selenium capsules

Iron

2 authorised claims · 87 capsules · ingredient page
  • “Iron contributes to normal cognitive function” · Focus
  • “Iron contributes to normal cognitive development of children” · Focus

All 87 iron capsules

Iodine

2 authorised claims · 45 capsules · ingredient page
  • “Iodine contributes to normal cognitive function” · Focus
  • “Iodine contributes to the normal production of thyroid hormones and normal thyroid function” · Thyroid

All 45 iodine capsules

Pantothenic Acid

1 authorised claim · 36 capsules · ingredient page
  • “Pantothenic acid contributes to normal mental performance” · Focus

All 36 pantothenic acid capsules

Assessed by the register and not authorised

The register looked at claims for these relating to fertility and testosterone and thyroid and focus 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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