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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 Heart and Stress

665 capsules across 48 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.

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.

Stress. Very few ingredients hold authorised register claims in this area, and this page is honest about that: the split below shows what may be said and what may not. Ingredients people discuss for stress appear with their register status, and Mind's resources cover support that goes beyond nutrition.

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

1 authorised claim · 145 capsules · ingredient page
  • “Vitamin C contributes to normal collagen formation for the normal function of blood vessels” · Heart

All 145 vitamin c capsules

Vitamin B6

1 authorised claim · 100 capsules · ingredient page
  • “Vitamin B6 contributes to normal homocysteine metabolism” · Heart

All 100 vitamin b6 capsules

Vitamin B12

1 authorised claim · 80 capsules · ingredient page
  • “Vitamin B12 contributes to normal homocysteine metabolism” · Heart

All 80 vitamin b12 capsules

Folate

1 authorised claim · 64 capsules · ingredient page
  • “Folate contributes to normal homocysteine metabolism” · Heart

All 64 folate capsules

Selenium

1 authorised claim · 45 capsules · ingredient page
  • “Selenium contributes to the normal thyroid function” · Thyroid

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

All 45 selenium capsules

Choline

1 authorised claim · 27 capsules · ingredient page
  • “Choline contributes to normal homocysteine metabolism” · Heart

All 27 choline capsules

Iodine

1 authorised claim · 24 capsules · ingredient page
  • “Iodine contributes to the normal production of thyroid hormones and normal thyroid function” · Thyroid

All 24 iodine capsules

Potassium

1 authorised claim · 17 capsules · ingredient page
  • “Potassium contributes to the maintenance of normal blood pressure” · Heart

All 17 potassium capsules

Beta Glucans

1 authorised claim · 3 capsules · ingredient page
  • “Beta-glucans contribute to the maintenance of normal blood cholesterol levels” · Heart

Glucomannan

1 authorised claim · 3 capsules · ingredient page
  • “Glucomannan contributes to the maintenance of normal blood cholesterol levels” · Heart

Thiamine

1 authorised claim · 2 capsules · ingredient page
  • “Thiamine contributes to the normal function of the heart” · Heart

Alpha-Linolenic Acid

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

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

Betaine

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

Assessed by the register and not authorised

The register looked at claims for these relating to thyroid and heart and stress 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.