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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 Fertility and Skin, hair and nails and Thyroid

1399 capsules across 64 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.

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.

Skin, hair and nails. The register authorises specific wording for several nutrients relating to normal skin, hair or nails, and this page collects them with the wording quoted exactly. Marketing in this category runs far ahead of the register; the split below shows exactly where the line sits.

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.

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 · 332 capsules · ingredient page
  • “Vitamin C contributes to normal collagen formation for the normal function of skin” · Skin, hair and nails
  • “Vitamin C contributes to normal collagen formation for the normal function of cartilage” · Joints

All 332 vitamin c capsules

Zinc

4 authorised claims · 249 capsules · ingredient page
  • “Zinc contributes to the maintenance of normal nails” · Skin, hair and nails
  • “Zinc contributes to the maintenance of normal skin” · Skin, hair and nails
  • “Zinc contributes to the maintenance of normal hair” · Skin, hair and nails
  • “Zinc contributes to normal fertility and reproduction” · Fertility

Not authorised for thyroid or joints: the register refused 2 claims 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

Biotin

2 authorised claims · 124 capsules · ingredient page
  • “Biotin contributes to the maintenance of normal hair” · Skin, hair and nails
  • “Biotin contributes to the maintenance of normal skin” · Skin, hair and nails

Not authorised for skin, hair and nails: the register refused 1 claim there.

All 124 biotin capsules

Selenium

4 authorised claims · 95 capsules · ingredient page
  • “Selenium contributes to the maintenance of normal nails” · Skin, hair and nails
  • “Selenium contributes to the maintenance of normal hair” · Skin, hair and nails
  • “Selenium contributes to normal spermatogenesis” · Fertility
  • “Selenium contributes to the normal thyroid function” · Thyroid

All 95 selenium capsules

Copper

3 authorised claims · 58 capsules · ingredient page
  • “Copper contributes to normal hair pigmentation” · Skin, hair and nails
  • “Copper contributes to normal skin pigmentation” · Skin, hair and nails
  • “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 maintenance of normal skin” · Skin, hair and nails

Not authorised for skin, hair and nails: the register refused 1 claim there.

All 54 vitamin a capsules

Niacin

1 authorised claim · 46 capsules · ingredient page
  • “Niacin contributes to the maintenance of normal skin” · Skin, hair and nails

All 46 niacin capsules

Iodine

2 authorised claims · 45 capsules · ingredient page
  • “Iodine contributes to the maintenance of normal skin” · Skin, hair and nails
  • “Iodine contributes to the normal production of thyroid hormones and normal thyroid function” · Thyroid

Not authorised for skin, hair and nails: the register refused 1 claim there.

All 45 iodine capsules

Riboflavin

1 authorised claim · 36 capsules · ingredient page
  • “Riboflavin contributes to the maintenance of normal skin” · Skin, hair and nails

All 36 riboflavin capsules

Manganese

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

All 32 manganese capsules

Assessed by the register and not authorised

The register looked at claims for these relating to joints and fertility and skin, hair and nails and thyroid 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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