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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

Anything you already take or are considering?

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.

Metabolism

451 capsules across 29 ingredients

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

Magnesium

1 authorised claim · 132 capsules · ingredient page
  • “Magnesium contributes to normal energy-yielding metabolism”

All 132 magnesium capsules

Vitamin C

1 authorised claim · 106 capsules · ingredient page
  • “Vitamin C contributes to normal energy-yielding metabolism”

All 106 vitamin c capsules

Zinc

4 authorised claims · 71 capsules · ingredient page
  • “Zinc contributes to normal carbohydrate metabolism”
  • “Zinc contributes to normal macronutrient metabolism”
  • “Zinc contributes to normal metabolism of fatty acids”
  • “Zinc contributes to normal metabolism of vitamin A”

All 71 zinc capsules

Vitamin B6

3 authorised claims · 62 capsules · ingredient page
  • “Vitamin B6 contributes to normal energy-yielding metabolism”
  • “Vitamin B6 contributes to normal homocysteine metabolism”
  • “Vitamin B6 contributes to normal protein and glycogen metabolism”

All 62 vitamin b6 capsules

Folate

1 authorised claim · 57 capsules · ingredient page
  • “Folate contributes to normal homocysteine metabolism”

All 57 folate capsules

Biotin

2 authorised claims · 53 capsules · ingredient page
  • “Biotin contributes to normal energy-yielding metabolism”
  • “Biotin contributes to normal macronutrient metabolism”

All 53 biotin capsules

Vitamin B12

2 authorised claims · 51 capsules · ingredient page
  • “Vitamin B12 contributes to normal energy-yielding metabolism”
  • “Vitamin B12 contributes to normal homocysteine metabolism”

All 51 vitamin b12 capsules

Calcium

1 authorised claim · 28 capsules · ingredient page
  • “Calcium contributes to normal energy-yielding metabolism”

All 28 calcium capsules

Iron

1 authorised claim · 19 capsules · ingredient page
  • “Iron contributes to normal energy-yielding metabolism”

All 19 iron capsules

Niacin

1 authorised claim · 19 capsules · ingredient page
  • “Niacin contributes to normal energy-yielding metabolism”

All 19 niacin capsules

Chromium

1 authorised claim · 18 capsules · ingredient page
  • “Chromium contributes to normal macronutrient metabolism”

All 18 chromium capsules

Vitamin A

1 authorised claim · 18 capsules · ingredient page
  • “Vitamin A contributes to normal iron metabolism”

All 18 vitamin a capsules

Riboflavin

2 authorised claims · 17 capsules · ingredient page
  • “Riboflavin contributes to normal energy-yielding metabolism”
  • “Riboflavin contributes to the normal metabolism of iron”

All 17 riboflavin capsules

Iodine

1 authorised claim · 16 capsules · ingredient page
  • “Iodine contributes to normal energy-yielding metabolism”

All 16 iodine capsules

Pantothenic Acid

2 authorised claims · 14 capsules · ingredient page
  • “Pantothenic acid contributes to normal energy-yielding metabolism”
  • “Pantothenic acid contributes to normal synthesis and metabolism of steroid hormones, vitamin D and some neurotransmitters”

All 14 pantothenic acid capsules

Choline

2 authorised claims · 10 capsules · ingredient page
  • “Choline contributes to normal homocysteine metabolism”
  • “Choline contributes to normal lipid metabolism”

All 10 choline capsules

Copper

1 authorised claim · 10 capsules · ingredient page
  • “Copper contributes to normal energy-yielding metabolism”

All 10 copper capsules

Manganese

1 authorised claim · 10 capsules · ingredient page
  • “Manganese contributes to normal energy-yielding metabolism”

All 10 manganese capsules

Molybdenum

1 authorised claim · 5 capsules · ingredient page
  • “Molybdenum contributes to normal sulphur amino acid metabolism”

All 5 molybdenum capsules

Phosphorus

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

Thiamine

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

Assessed by the register and not authorised

The register looked at claims for these relating to metabolism 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

Independent organisations for support and reliable information; none endorses any product on this site.

The full metabolism page, every ingredient