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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.

Teeth and gums and Thyroid and Heart and Sleep

1439 capsules across 58 ingredients

Teeth and gums. The register authorises wording about the maintenance of normal teeth for several minerals and vitamins, quoted exactly on their pages. Brushing, fluoride and regular check-ups do the real work; the Oral Health Foundation is the specialist charity.

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.

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.

Sleep. Almost nothing holds an authorised GB register claim about sleep, and that absence is worth knowing in itself: sellers may not claim it either. Ingredients people discuss for sleep appear below with their actual register status, and The Sleep Charity offers evidence-based sleep advice.

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 · 27 capsules · ingredient page
  • “Magnesium contributes to the maintenance of normal teeth” · Teeth and gums

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

All 27 magnesium capsules

Vitamin C

3 authorised claims · 17 capsules · ingredient page
  • “Vitamin C contributes to normal collagen formation for the normal function of blood vessels” · Heart
  • “Vitamin C contributes to normal collagen formation for the normal function of gums” · Teeth and gums
  • “Vitamin C contributes to normal collagen formation for the normal function of teeth” · Teeth and gums

All 17 vitamin c capsules

Vitamin D

1 authorised claim · 13 capsules · ingredient page
  • “Vitamin D contributes to the maintenance of normal teeth” · Teeth and gums

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

All 13 vitamin d capsules

Vitamin B6

1 authorised claim · 9 capsules · ingredient page
  • “Vitamin B6 contributes to normal homocysteine metabolism” · Heart

Not authorised for teeth and gums: the register refused 1 claim there.

All 9 vitamin b6 capsules

Calcium

1 authorised claim · 5 capsules · ingredient page
  • “Calcium is needed for the maintenance of normal teeth” · Teeth and gums

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

All 5 calcium capsules

Potassium

1 authorised claim · 5 capsules · ingredient page
  • “Potassium contributes to the maintenance of normal blood pressure” · Heart

All 5 potassium capsules

Choline

1 authorised claim · 3 capsules · ingredient page
  • “Choline contributes to normal homocysteine metabolism” · Heart

Folate

1 authorised claim · 3 capsules · ingredient page
  • “Folate contributes to normal homocysteine metabolism” · Heart

Selenium

1 authorised claim · 3 capsules · ingredient page
  • “Selenium contributes to the normal thyroid function” · Thyroid

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

Glucomannan

1 authorised claim · 1 capsule · ingredient page
  • “Glucomannan contributes to the maintenance of normal blood cholesterol levels” · Heart

Vitamin B12

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

Not authorised for teeth and gums: the register refused 1 claim there.

Melatonin

2 authorised claims · ingredient page
  • “Melatonin contributes to the alleviation of subjective feelings of jet lag” · Sleep
  • “Melatonin contributes to the reduction of time taken to fall asleep” · Sleep

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

Melatonin is prescription only in the UK, so no merchant here lists it. It stays for information.

Assessed by the register and not authorised

The register looked at claims for these relating to teeth and gums and thyroid and heart and sleep 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.