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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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Testosterone and Bones and Weight and Immunity

1516 capsules across 63 ingredients

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.

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.

Weight. The register takes a strict line on weight claims, and very little is authorised. This page shows the real status of ingredients people discuss for weight, quoted exactly. The NHS Better Health programme below is the evidence-based 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

1 authorised claim · 28 capsules · ingredient page
  • “Magnesium contributes to the maintenance of normal bones” · Bones

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

All 28 magnesium capsules

Vitamin C

3 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

All 17 vitamin c capsules

Vitamin D

5 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 1 more on the ingredient page

All 13 vitamin d capsules

Zinc

3 authorised claims · 12 capsules · ingredient page
  • “Zinc contributes to the normal function of the immune system” · Immunity
  • “Zinc contributes to the maintenance of normal bones” · Bones
  • “Zinc contributes to the maintenance of normal testosterone levels in the blood” · Testosterone

All 12 zinc capsules

Vitamin B6

1 authorised claim · 10 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 10 vitamin b6 capsules

Calcium

3 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

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

All 5 calcium capsules

Copper

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

All 4 copper capsules

Iron

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

All 4 iron capsules

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

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

Vitamin K

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

Glucomannan

1 authorised claim · 1 capsule · ingredient page
  • “Glucomannan in the context of an energy restricted diet contributes to weight loss” · Weight

Vitamin A

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

Not authorised for bones: the register refused 2 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 testosterone and bones and weight 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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