Skip to content
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.

What do you want help with?

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”.

Preferences

Seller-stated only: vegan means the seller says vegan.

Metabolism

540 capsules across 30 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 · 167 capsules · ingredient page
  • “Magnesium contributes to normal energy-yielding metabolism”

All 167 magnesium capsules

Vitamin C

1 authorised claim · 145 capsules · ingredient page
  • “Vitamin C contributes to normal energy-yielding metabolism”

All 145 vitamin c capsules

Zinc

4 authorised claims · 108 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 108 zinc capsules

Vitamin B6

3 authorised claims · 100 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 100 vitamin b6 capsules

Vitamin B12

2 authorised claims · 80 capsules · ingredient page
  • “Vitamin B12 contributes to normal energy-yielding metabolism”
  • “Vitamin B12 contributes to normal homocysteine metabolism”

All 80 vitamin b12 capsules

Biotin

2 authorised claims · 65 capsules · ingredient page
  • “Biotin contributes to normal energy-yielding metabolism”
  • “Biotin contributes to normal macronutrient metabolism”

All 65 biotin capsules

Folate

1 authorised claim · 64 capsules · ingredient page
  • “Folate contributes to normal homocysteine metabolism”

All 64 folate capsules

Calcium

1 authorised claim · 41 capsules · ingredient page
  • “Calcium contributes to normal energy-yielding metabolism”

All 41 calcium capsules

Iron

1 authorised claim · 37 capsules · ingredient page
  • “Iron contributes to normal energy-yielding metabolism”

All 37 iron capsules

Chromium

1 authorised claim · 30 capsules · ingredient page
  • “Chromium contributes to normal macronutrient metabolism”

All 30 chromium capsules

Choline

2 authorised claims · 27 capsules · ingredient page
  • “Choline contributes to normal homocysteine metabolism”
  • “Choline contributes to normal lipid metabolism”

All 27 choline capsules

Iodine

1 authorised claim · 24 capsules · ingredient page
  • “Iodine contributes to normal energy-yielding metabolism”

All 24 iodine capsules

Niacin

1 authorised claim · 20 capsules · ingredient page
  • “Niacin contributes to normal energy-yielding metabolism”

All 20 niacin capsules

Copper

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

All 19 copper capsules

Vitamin A

1 authorised claim · 19 capsules · ingredient page
  • “Vitamin A contributes to normal iron metabolism”

All 19 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

Pantothenic Acid

2 authorised claims · 16 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 16 pantothenic acid capsules

Manganese

1 authorised claim · 11 capsules · ingredient page
  • “Manganese contributes to normal energy-yielding metabolism”

All 11 manganese capsules

Molybdenum

1 authorised claim · 8 capsules · ingredient page
  • “Molybdenum contributes to normal sulphur amino acid metabolism”

All 8 molybdenum capsules

Thiamine

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

Betaine

1 authorised claim · 1 capsule · ingredient page
  • “Betaine contributes to normal homocysteine 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