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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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Fertility and Focus and Immunity and Joints

1565 capsules across 71 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.

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.

Joints. Joints carry the largest set of refused claims in the register: glucosamine, chondroitin, MSM, turmeric and collagen-for-joints wording were all assessed and turned down. What is authorised is narrow and quoted exactly on the ingredient pages: vitamin C for normal collagen formation for the normal function of cartilage, and manganese for normal formation of connective tissue. Versus Arthritis is the specialist charity for anything beyond nutrition.

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

3 authorised claims · 332 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
  • “Vitamin C contributes to normal collagen formation for the normal function of cartilage” · Joints

All 332 vitamin c capsules

Zinc

3 authorised claims · 249 capsules · ingredient page
  • “Zinc contributes to the normal function of the immune system” · Immunity
  • “Zinc contributes to normal fertility and reproduction” · Fertility
  • “Zinc contributes to normal cognitive function” · Focus

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

All 249 zinc capsules

Vitamin D

2 authorised claims · 232 capsules · ingredient page
  • “Vitamin D contributes to the normal function of the immune system” · Immunity
  • “Vitamin D contributes to the normal function of the immune system in children.” · Immunity

All 232 vitamin d capsules

Vitamin B6

1 authorised claim · 185 capsules · ingredient page
  • “Vitamin B6 contributes to the normal function of the immune system” · Immunity

All 185 vitamin b6 capsules

Vitamin B12

1 authorised claim · 163 capsules · ingredient page
  • “Vitamin B12 contributes to the normal function of the immune system” · Immunity

All 163 vitamin b12 capsules

Folate

2 authorised claims · 138 capsules · ingredient page
  • “Folate contributes to the normal function of the immune system” · Immunity
  • “Folate contributes to maternal tissue growth during pregnancy” · Fertility

All 138 folate capsules

Selenium

2 authorised claims · 95 capsules · ingredient page
  • “Selenium contributes to the normal function of the immune system” · Immunity
  • “Selenium contributes to normal spermatogenesis” · Fertility

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

All 95 selenium capsules

Iron

3 authorised claims · 87 capsules · 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

All 87 iron capsules

Copper

2 authorised claims · 58 capsules · ingredient page
  • “Copper contributes to the normal function of the immune system” · Immunity
  • “Copper contributes to maintenance of normal connective tissues” · Joints

All 58 copper capsules

Vitamin A

1 authorised claim · 54 capsules · ingredient page
  • “Vitamin A contributes to the normal function of the immune system” · Immunity

All 54 vitamin a capsules

Iodine

1 authorised claim · 45 capsules · ingredient page
  • “Iodine contributes to normal cognitive function” · Focus

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

Manganese

1 authorised claim · 32 capsules · ingredient page
  • “Manganese contributes to the normal formation of connective tissue” · Joints

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

All 32 manganese capsules

Assessed by the register and not authorised

The register looked at claims for these relating to fertility and focus and immunity and joints 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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