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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 Bones and Muscles and Immunity

1577 capsules across 75 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.

Bones. Ingredients here hold register claims relating to the maintenance of normal bones, quoted exactly on their pages. Weight-bearing exercise and dietary calcium are the foundations, and the Royal Osteoporosis Society is the specialist charity for anything further.

Muscles. Ingredients here hold register claims relating to normal muscle function or muscle protein, quoted exactly on their pages. Resistance exercise and overall protein intake are the fundamentals the claims assume; the NHS exercise guidance below is a good starting point.

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

Magnesium

2 authorised claims · 27 capsules · ingredient page
  • “Magnesium contributes to the maintenance of normal bones” · Bones
  • “Magnesium contributes to normal muscle function” · Muscles

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

All 27 magnesium capsules

Vitamin C

4 authorised claims · 17 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 bones” · Bones
  • “Vitamin C contributes to normal collagen formation for the normal function of cartilage” · Joints

All 17 vitamin c capsules

Vitamin D

7 authorised claims · 13 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
  • “Vitamin D contributes to the maintenance of normal bones” · Bones
  • “Vitamin D is needed for normal growth and development of bone in children.” · Bones
  • and 3 more on the ingredient page

All 13 vitamin d capsules

Zinc

2 authorised claims · 11 capsules · ingredient page
  • “Zinc contributes to the normal function of the immune system” · Immunity
  • “Zinc contributes to the maintenance of normal bones” · Bones

Not authorised for muscles or joints: the register refused 2 claims there.

All 11 zinc capsules

Vitamin B6

1 authorised claim · 9 capsules · ingredient page
  • “Vitamin B6 contributes to the normal function of the immune system” · Immunity

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

All 9 vitamin b6 capsules

Calcium

4 authorised claims · 5 capsules · ingredient page
  • “Calcium helps to reduce the loss of bone mineral in post-menopausal women. Low bone mineral density is a risk factor for osteoporotic bone fractures” · Bones
  • “Calcium is needed for normal growth and development of bone in children.” · Bones
  • “Calcium is needed for the maintenance of normal bones” · Bones
  • “Calcium contributes to normal muscle function” · Muscles

All 5 calcium capsules

Potassium

1 authorised claim · 5 capsules · ingredient page
  • “Potassium contributes to normal muscle function” · Muscles

All 5 potassium capsules

Copper

2 authorised claims · 4 capsules · ingredient page
  • “Copper contributes to the normal function of the immune system” · Immunity
  • “Copper contributes to maintenance of normal connective tissues” · Joints

All 4 copper capsules

Iron

1 authorised claim · 4 capsules · ingredient page
  • “Iron contributes to the normal function of the immune system” · Immunity

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

All 4 iron capsules

creatine

2 authorised claims · 3 capsules · ingredient page
  • “Daily creatine consumption can enhance the effect of resistance training on muscle strength in adults over the age of 55.” · Muscles
  • “Creatine increases physical performance in successive bursts of short-term, high intensity exercise” · Muscles

Not authorised for muscles: the register refused 3 claims there.

Folate

1 authorised claim · 3 capsules · ingredient page
  • “Folate contributes to the normal function of the immune system” · Immunity

Selenium

1 authorised claim · 3 capsules · ingredient page
  • “Selenium contributes to the normal function of the immune system” · Immunity

Manganese

2 authorised claims · 2 capsules · ingredient page
  • “Manganese contributes to the maintenance of normal bones” · Bones
  • “Manganese contributes to the normal formation of connective tissue” · Joints

Vitamin K

1 authorised claim · 2 capsules · ingredient page
  • “Vitamin K contributes to the maintenance of normal bones” · Bones

Vitamin A

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

Not authorised for muscles or bones: the register refused 3 claims there.

Vitamin B12

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

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

Assessed by the register and not authorised

The register looked at claims for these relating to joints and bones and muscles 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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