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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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Thyroid and Testosterone and Mood

1075 capsules across 17 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.

Testosterone. Only a small number of ingredients hold register claims mentioning testosterone, and this page quotes them exactly. Claims in this category are heavily marketed well beyond what the register authorises; the split below shows the line.

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

All 258 magnesium capsules

Vitamin C

1 authorised claim · 238 capsules · ingredient page
  • “Vitamin C contributes to normal psychological function” · Mood

All 238 vitamin c capsules

Zinc

1 authorised claim · 185 capsules · ingredient page
  • “Zinc contributes to the maintenance of normal testosterone levels in the blood” · Testosterone

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

All 185 zinc capsules

Vitamin B6

1 authorised claim · 144 capsules · ingredient page
  • “Vitamin B6 contributes to normal psychological function” · Mood

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

All 144 vitamin b6 capsules

Vitamin B12

1 authorised claim · 123 capsules · ingredient page
  • “Vitamin B12 contributes to normal psychological function” · Mood

All 123 vitamin b12 capsules

Folate

1 authorised claim · 104 capsules · ingredient page
  • “Folate contributes to normal psychological function” · Mood

All 104 folate capsules

Biotin

1 authorised claim · 94 capsules · ingredient page
  • “Biotin contributes to normal psychological function” · Mood

All 94 biotin capsules

Selenium

1 authorised claim · 74 capsules · ingredient page
  • “Selenium contributes to the normal thyroid function” · Thyroid

All 74 selenium capsules

Iodine

1 authorised claim · 38 capsules · ingredient page
  • “Iodine contributes to the normal production of thyroid hormones and normal thyroid function” · Thyroid

All 38 iodine capsules

Niacin

1 authorised claim · 38 capsules · ingredient page
  • “Niacin contributes to normal psychological function” · Mood

All 38 niacin capsules

Thiamine

1 authorised claim · 3 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 thyroid and testosterone 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.

Support & information

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