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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 Immunity and Tiredness and fatigue

1465 capsules across 56 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.

Immunity. This page gathers ingredients whose GB register claims relate to the normal function of the immune system, with the exact authorised wording quoted on each ingredient page. Anything not authorised may not be claimed by sellers, and we quote that status too. A balanced diet, sleep and vaccination advice from the NHS come before any capsule.

Tiredness and fatigue. The register's phrase is 'a reduction of tiredness and fatigue', and a surprising number of everyday nutrients hold that authorised wording. This page shows which, quoted exactly, alongside ingredients people discuss without an authorised claim. Persistent tiredness is worth raising with a GP; the NHS link below covers self-help basics.

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

2 authorised claims · 108 capsules · ingredient page
  • “Magnesium contributes to a reduction of tiredness and fatigue” · Tiredness and fatigue
  • “Magnesium contributes to the maintenance of normal teeth” · Teeth and gums

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

All 108 magnesium capsules

Vitamin C

5 authorised claims · 68 capsules · ingredient page
  • “Vitamin C contributes to maintain the normal function of the immune system during and after intense physical exercise” · Immunity
  • “Vitamin C contributes to the normal function of the immune system” · Immunity
  • “Vitamin C contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue
  • “Vitamin C contributes to normal collagen formation for the normal function of gums” · Teeth and gums
  • and 1 more on the ingredient page

Not authorised for tiredness and fatigue: the register refused 1 claim there.

All 68 vitamin c capsules

Vitamin D

3 authorised claims · 60 capsules · ingredient page
  • “Vitamin D contributes to the normal function of the immune system” · Immunity
  • “Vitamin D contributes to the normal function of the immune system in children.” · Immunity
  • “Vitamin D contributes to the maintenance of normal teeth” · Teeth and gums

All 60 vitamin d capsules

Zinc

1 authorised claim · 53 capsules · ingredient page
  • “Zinc contributes to the normal function of the immune system” · Immunity

Not authorised for tiredness and fatigue or teeth and gums: the register refused 2 claims there.

All 53 zinc capsules

Vitamin B6

2 authorised claims · 44 capsules · ingredient page
  • “Vitamin B6 contributes to the normal function of the immune system” · Immunity
  • “Vitamin B6 contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

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

All 44 vitamin b6 capsules

Vitamin B12

2 authorised claims · 34 capsules · ingredient page
  • “Vitamin B12 contributes to the normal function of the immune system” · Immunity
  • “Vitamin B12 contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

Not authorised for teeth and gums or tiredness and fatigue: the register refused 2 claims there.

All 34 vitamin b12 capsules

Folate

2 authorised claims · 30 capsules · ingredient page
  • “Folate contributes to the normal function of the immune system” · Immunity
  • “Folate contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

All 30 folate capsules

Calcium

1 authorised claim · 26 capsules · ingredient page
  • “Calcium is needed for the maintenance of normal teeth” · Teeth and gums

Not authorised for tiredness and fatigue: the register refused 1 claim there.

All 26 calcium capsules

Iron

2 authorised claims · 17 capsules · ingredient page
  • “Iron contributes to the normal function of the immune system” · Immunity
  • “Iron contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

All 17 iron capsules

Selenium

1 authorised claim · 16 capsules · ingredient page
  • “Selenium contributes to the normal function of the immune system” · Immunity

All 16 selenium capsules

Copper

1 authorised claim · 13 capsules · ingredient page
  • “Copper contributes to the normal function of the immune system” · Immunity

Not authorised for tiredness and fatigue: the register refused 1 claim there.

All 13 copper capsules

Riboflavin

1 authorised claim · 11 capsules · ingredient page
  • “Riboflavin contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

All 11 riboflavin capsules

Niacin

1 authorised claim · 10 capsules · ingredient page
  • “Niacin contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

All 10 niacin capsules

Vitamin A

1 authorised claim · 9 capsules · ingredient page
  • “Vitamin A contributes to the normal function of the immune system” · Immunity

Not authorised for teeth and gums or tiredness and fatigue: the register refused 3 claims there.

All 9 vitamin a capsules

Pantothenic Acid

1 authorised claim · 6 capsules · ingredient page
  • “Pantothenic acid contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

All 6 pantothenic acid capsules

Assessed by the register and not authorised

The register looked at claims for these relating to teeth and gums and immunity and tiredness and fatigue 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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