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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.

Blood sugar and Mood

408 capsules across 20 ingredients

Blood sugar. A small number of ingredients hold authorised register wording about normal blood glucose levels, quoted exactly on their pages; a much larger number of claims about blood sugar were assessed and refused. Nothing here is about treating or preventing diabetes, and anyone managing blood glucose should follow their care team's advice. Diabetes UK 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.

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 · 132 capsules · ingredient page
  • “Magnesium contributes to normal psychological function” · Mood

Not authorised for blood sugar: the register refused 1 claim there.

All 132 magnesium capsules

Vitamin C

1 authorised claim · 106 capsules · ingredient page
  • “Vitamin C contributes to normal psychological function” · Mood

All 106 vitamin c capsules

Vitamin B6

1 authorised claim · 62 capsules · ingredient page
  • “Vitamin B6 contributes to normal psychological function” · Mood

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

All 62 vitamin b6 capsules

Folate

1 authorised claim · 57 capsules · ingredient page
  • “Folate contributes to normal psychological function” · Mood

All 57 folate capsules

Biotin

1 authorised claim · 53 capsules · ingredient page
  • “Biotin contributes to normal psychological function” · Mood

All 53 biotin capsules

Vitamin B12

1 authorised claim · 51 capsules · ingredient page
  • “Vitamin B12 contributes to normal psychological function” · Mood

All 51 vitamin b12 capsules

Niacin

1 authorised claim · 19 capsules · ingredient page
  • “Niacin contributes to normal psychological function” · Mood

All 19 niacin capsules

Chromium

1 authorised claim · 18 capsules · ingredient page
  • “Chromium contributes to the maintenance of normal blood glucose levels” · Blood sugar

All 18 chromium capsules

Thiamine

1 authorised claim · 2 capsules · ingredient page
  • “Thiamine contributes to normal psychological function” · Mood

Assessed by the register and not authorised

The register looked at claims for these relating to blood sugar and mood 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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