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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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Blood and iron and Joints and Skin, hair and nails

561 capsules across 50 ingredients

Blood and iron. Ingredients here hold register wording about normal red blood cell formation, oxygen transport, iron absorption or normal blood clotting, quoted exactly on their pages. Suspected iron deficiency needs a blood test before a supplement; the NHS page below explains why.

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.

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.

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 · 106 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
  • “Vitamin C increases iron absorption” · Blood and iron

All 106 vitamin c capsules

Zinc

3 authorised claims · 71 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

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

All 71 zinc capsules

Vitamin B6

1 authorised claim · 62 capsules · ingredient page
  • “Vitamin B6 contributes to normal red blood cell formation” · Blood and iron

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

All 62 vitamin b6 capsules

Folate

1 authorised claim · 57 capsules · ingredient page
  • “Folate contributes to normal blood formation” · Blood and iron

All 57 folate capsules

Biotin

2 authorised claims · 53 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 53 biotin capsules

Vitamin B12

1 authorised claim · 51 capsules · ingredient page
  • “Vitamin B12 contributes to normal red blood cell formation” · Blood and iron

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

All 51 vitamin b12 capsules

Vitamin K

1 authorised claim · 39 capsules · ingredient page
  • “Vitamin K contributes to normal blood clotting” · Blood and iron

All 39 vitamin k capsules

Calcium

1 authorised claim · 28 capsules · ingredient page
  • “Calcium contributes to normal blood clotting” · Blood and iron

All 28 calcium capsules

Selenium

2 authorised claims · 28 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

All 28 selenium capsules

Iron

2 authorised claims · 19 capsules · ingredient page
  • “Iron contributes to normal formation of red blood cells and haemoglobin” · Blood and iron
  • “Iron contributes to normal oxygen transport in the body” · Blood and iron

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

All 19 iron capsules

Niacin

1 authorised claim · 19 capsules · ingredient page
  • “Niacin contributes to the maintenance of normal skin” · Skin, hair and nails

All 19 niacin capsules

Vitamin A

1 authorised claim · 18 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 18 vitamin a capsules

Riboflavin

2 authorised claims · 17 capsules · ingredient page
  • “Riboflavin contributes to the maintenance of normal skin” · Skin, hair and nails
  • “Riboflavin contributes to the maintenance of normal red blood cells” · Blood and iron

All 17 riboflavin capsules

Iodine

1 authorised claim · 16 capsules · ingredient page
  • “Iodine 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 16 iodine capsules

Copper

4 authorised claims · 10 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
  • “Copper contributes to normal iron transport in the body” · Blood and iron

All 10 copper capsules

Manganese

1 authorised claim · 10 capsules · ingredient page
  • “Manganese contributes to the normal formation of connective tissue” · Joints

All 10 manganese capsules

Assessed by the register and not authorised

The register looked at claims for these relating to blood and iron and joints and skin, hair and nails 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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