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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.

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

Thyroid and Mood and Weight

78 capsules across 18 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.

Mood. The register authorises wording for some nutrients relating to normal psychological function, and this page shows which, quoted exactly. Low mood that persists deserves real support rather than a capsule; Mind's information and helplines below are a good place to start.

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.

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 · 36 capsules · ingredient page
  • “Vitamin C contributes to normal psychological function” · Mood

All 36 vitamin c capsules

Vitamin B6

1 authorised claim · 24 capsules · ingredient page
  • “Vitamin B6 contributes to normal psychological function” · Mood

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

All 24 vitamin b6 capsules

Magnesium

1 authorised claim · 18 capsules · ingredient page
  • “Magnesium contributes to normal psychological function” · Mood

All 18 magnesium capsules

Selenium

1 authorised claim · 18 capsules · ingredient page
  • “Selenium contributes to the normal thyroid function” · Thyroid

All 18 selenium capsules

Vitamin B12

1 authorised claim · 14 capsules · ingredient page
  • “Vitamin B12 contributes to normal psychological function” · Mood

All 14 vitamin b12 capsules

Biotin

1 authorised claim · 13 capsules · ingredient page
  • “Biotin contributes to normal psychological function” · Mood

All 13 biotin capsules

Iodine

1 authorised claim · 8 capsules · ingredient page
  • “Iodine contributes to the normal production of thyroid hormones and normal thyroid function” · Thyroid

All 8 iodine capsules

Folate

1 authorised claim · 7 capsules · ingredient page
  • “Folate contributes to normal psychological function” · Mood

All 7 folate capsules

Niacin

1 authorised claim · 5 capsules · ingredient page
  • “Niacin contributes to normal psychological function” · Mood

All 5 niacin capsules

Glucomannan

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

Assessed by the register and not authorised

The register looked at claims for these relating to thyroid and mood and weight 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

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