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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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Joints and Testosterone and Immunity

619 capsules across 45 ingredients

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.

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.

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

3 authorised claims · 145 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 145 vitamin c capsules

Zinc

2 authorised claims · 108 capsules · ingredient page
  • “Zinc contributes to the normal function of the immune system” · Immunity
  • “Zinc contributes to the maintenance of normal testosterone levels in the blood” · Testosterone

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

All 108 zinc capsules

Vitamin B6

1 authorised claim · 100 capsules · ingredient page
  • “Vitamin B6 contributes to the normal function of the immune system” · Immunity

All 100 vitamin b6 capsules

Vitamin D

2 authorised claims · 100 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 100 vitamin d capsules

Vitamin B12

1 authorised claim · 80 capsules · ingredient page
  • “Vitamin B12 contributes to the normal function of the immune system” · Immunity

All 80 vitamin b12 capsules

Folate

1 authorised claim · 64 capsules · ingredient page
  • “Folate contributes to the normal function of the immune system” · Immunity

All 64 folate capsules

Selenium

1 authorised claim · 45 capsules · ingredient page
  • “Selenium contributes to the normal function of the immune system” · Immunity

All 45 selenium capsules

Iron

1 authorised claim · 37 capsules · ingredient page
  • “Iron contributes to the normal function of the immune system” · Immunity

All 37 iron capsules

Copper

2 authorised claims · 19 capsules · ingredient page
  • “Copper contributes to the normal function of the immune system” · Immunity
  • “Copper contributes to maintenance of normal connective tissues” · Joints

All 19 copper capsules

Vitamin A

1 authorised claim · 19 capsules · ingredient page
  • “Vitamin A contributes to the normal function of the immune system” · Immunity

All 19 vitamin a capsules

Manganese

1 authorised claim · 11 capsules · ingredient page
  • “Manganese contributes to the normal formation of connective tissue” · Joints

All 11 manganese capsules

Assessed by the register and not authorised

The register looked at claims for these relating to joints and testosterone 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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