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BestCapsules

Find capsules by goal

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.

Blood and iron and Metabolism

16 capsules across 14 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.

Metabolism. The register's phrase is 'contributes to normal energy-yielding metabolism', and many everyday vitamins and minerals hold it. It is not a claim about weight or about feeling energetic, which is why this goal sits apart from Weight and from Tiredness and fatigue. Wording is quoted exactly on each ingredient page.

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

2 authorised claims · 7 capsules · ingredient page
  • “Vitamin C contributes to normal energy-yielding metabolism” · Metabolism
  • “Vitamin C increases iron absorption” · Blood and iron

All 7 vitamin c capsules

Zinc

4 authorised claims · 5 capsules · ingredient page
  • “Zinc contributes to normal carbohydrate metabolism” · Metabolism
  • “Zinc contributes to normal macronutrient metabolism” · Metabolism
  • “Zinc contributes to normal metabolism of fatty acids” · Metabolism
  • “Zinc contributes to normal metabolism of vitamin A” · Metabolism

All 5 zinc capsules

Biotin

2 authorised claims · 2 capsules · ingredient page
  • “Biotin contributes to normal energy-yielding metabolism” · Metabolism
  • “Biotin contributes to normal macronutrient metabolism” · Metabolism

Copper

2 authorised claims · 2 capsules · ingredient page
  • “Copper contributes to normal energy-yielding metabolism” · Metabolism
  • “Copper contributes to normal iron transport in the body” · Blood and iron

Magnesium

1 authorised claim · 2 capsules · ingredient page
  • “Magnesium contributes to normal energy-yielding metabolism” · Metabolism

Not authorised for metabolism or blood and iron: the register refused 3 claims there.

Vitamin A

1 authorised claim · 2 capsules · ingredient page
  • “Vitamin A contributes to normal iron metabolism” · Metabolism

Vitamin B12

3 authorised claims · 2 capsules · ingredient page
  • “Vitamin B12 contributes to normal energy-yielding metabolism” · Metabolism
  • “Vitamin B12 contributes to normal homocysteine metabolism” · Metabolism
  • “Vitamin B12 contributes to normal red blood cell formation” · Blood and iron

Vitamin B6

4 authorised claims · 2 capsules · ingredient page
  • “Vitamin B6 contributes to normal energy-yielding metabolism” · Metabolism
  • “Vitamin B6 contributes to normal homocysteine metabolism” · Metabolism
  • “Vitamin B6 contributes to normal protein and glycogen metabolism” · Metabolism
  • “Vitamin B6 contributes to normal red blood cell formation” · Blood and iron

Chromium

1 authorised claim · 1 capsule · ingredient page
  • “Chromium contributes to normal macronutrient metabolism” · Metabolism

Not authorised for metabolism: the register refused 2 claims there.

Folate

2 authorised claims · 1 capsule · ingredient page
  • “Folate contributes to normal blood formation” · Blood and iron
  • “Folate contributes to normal homocysteine metabolism” · Metabolism

Iodine

1 authorised claim · 1 capsule · ingredient page
  • “Iodine contributes to normal energy-yielding metabolism” · Metabolism

Niacin

1 authorised claim · 1 capsule · ingredient page
  • “Niacin contributes to normal energy-yielding metabolism” · Metabolism

Riboflavin

3 authorised claims · 1 capsule · ingredient page
  • “Riboflavin contributes to normal energy-yielding metabolism” · Metabolism
  • “Riboflavin contributes to the maintenance of normal red blood cells” · Blood and iron
  • “Riboflavin contributes to the normal metabolism of iron” · Metabolism

Vitamin K

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

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