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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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Blood and iron and Immunity

1292 capsules across 40 ingredients

Blood and iron. Ingredients here hold register wording about normal red blood cell formation, oxygen transport, iron absorption or normal blood clotting, quoted exactly on their pages. Suspected iron deficiency needs a blood test before a supplement; the NHS page below explains why.

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.

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

3 authorised claims · 17 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 increases iron absorption” · Blood and iron

All 17 vitamin c capsules

Vitamin D

2 authorised claims · 13 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

All 13 vitamin d capsules

Zinc

1 authorised claim · 12 capsules · ingredient page
  • “Zinc contributes to the normal function of the immune system” · Immunity

All 12 zinc capsules

Vitamin B6

2 authorised claims · 10 capsules · ingredient page
  • “Vitamin B6 contributes to the normal function of the immune system” · Immunity
  • “Vitamin B6 contributes to normal red blood cell formation” · Blood and iron

All 10 vitamin b6 capsules

Calcium

1 authorised claim · 5 capsules · ingredient page
  • “Calcium contributes to normal blood clotting” · Blood and iron

All 5 calcium capsules

Copper

2 authorised claims · 4 capsules · ingredient page
  • “Copper contributes to the normal function of the immune system” · Immunity
  • “Copper contributes to normal iron transport in the body” · Blood and iron

All 4 copper capsules

Iron

3 authorised claims · 4 capsules · ingredient page
  • “Iron contributes to the normal function of the immune system” · Immunity
  • “Iron contributes to normal formation of red blood cells and haemoglobin” · Blood and iron
  • “Iron contributes to normal oxygen transport in the body” · Blood and iron

All 4 iron capsules

Folate

2 authorised claims · 3 capsules · ingredient page
  • “Folate contributes to the normal function of the immune system” · Immunity
  • “Folate contributes to normal blood formation” · Blood and iron

Selenium

1 authorised claim · 3 capsules · ingredient page
  • “Selenium contributes to the normal function of the immune system” · Immunity

Vitamin K

1 authorised claim · 2 capsules · ingredient page
  • “Vitamin K contributes to normal blood clotting” · Blood and iron

Riboflavin

1 authorised claim · 1 capsule · ingredient page
  • “Riboflavin contributes to the maintenance of normal red blood cells” · Blood and iron

Vitamin A

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

Vitamin B12

2 authorised claims · 1 capsule · ingredient page
  • “Vitamin B12 contributes to the normal function of the immune system” · Immunity
  • “Vitamin B12 contributes to normal red blood cell formation” · Blood and iron

Assessed by the register and not authorised

The register looked at claims for these relating to blood and iron and immunity 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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