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BestCapsules

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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.

  • None yet. Type an ingredient in the box above, for example “magnesium” or “turmeric”.

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Seller-stated only: vegan means the seller says vegan.

Thyroid and Bones and Heart and Digestion

20 capsules across 24 ingredients

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.

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.

Heart. This page collects ingredients whose register claims relate to the heart, blood pressure or cholesterol, quoted exactly. Diet, movement and prescribed medication come first in this area, and the British Heart Foundation below is the specialist charity for reliable information.

Digestion. The register authorises specific wording about digestion for a few nutrients, quoted exactly on their pages, and refused most of the probiotic and gut wording sellers reach for. The split below is the honest picture. Persistent digestive symptoms are a matter for a GP, and Guts UK 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 · 4 capsules · ingredient page
  • “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 blood vessels” · Heart

All 4 vitamin c capsules

Calcium

4 authorised claims · 3 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 the normal function of digestive enzymes” · Digestion

Not authorised for heart: the register refused 2 claims there.

Magnesium

1 authorised claim · 3 capsules · ingredient page
  • “Magnesium contributes to the maintenance of normal bones” · Bones

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

Potassium

1 authorised claim · 3 capsules · ingredient page
  • “Potassium contributes to the maintenance of normal blood pressure” · Heart

Zinc

1 authorised claim · 3 capsules · ingredient page
  • “Zinc contributes to the maintenance of normal bones” · Bones

Not authorised for thyroid or heart: the register refused 2 claims there.

Chloride

1 authorised claim · 2 capsules · ingredient page
  • “Chloride contributes to normal digestion by production of hydrochloric acid in the stomach” · Digestion

Vitamin B12

1 authorised claim · 2 capsules · ingredient page
  • “Vitamin B12 contributes to normal homocysteine metabolism” · Heart

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

Vitamin B6

1 authorised claim · 2 capsules · ingredient page
  • “Vitamin B6 contributes to normal homocysteine metabolism” · Heart

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

Activated Charcoal

1 authorised claim · 1 capsule · ingredient page
  • “Activated charcoal contributes to reducing excessive flatulence after eating” · Digestion

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

Beta Glucans

1 authorised claim · 1 capsule · ingredient page
  • “Beta-glucans contribute to the maintenance of normal blood cholesterol levels” · Heart

Manganese

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

Assessed by the register and not authorised

The register looked at claims for these relating to thyroid and bones and heart and digestion and turned them down. Sellers may not make them. Prices are shown for ingredients you named; the rest link to their register page.

Support & information

Independent organisations for support and reliable information; none endorses any product on this site.