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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.

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

Digestion and Metabolism and Skin, hair and nails

583 capsules across 64 ingredients

Digestion. The register authorises specific wording about digestion for a few nutrients, quoted exactly on their pages, and refused most of the probiotic and gut wording sellers reach for. The split below is the honest picture. Persistent digestive symptoms are a matter for a GP, and Guts UK is the specialist charity.

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.

Skin, hair and nails. The register authorises specific wording for several nutrients relating to normal skin, hair or nails, and this page collects them with the wording quoted exactly. Marketing in this category runs far ahead of the register; the split below shows exactly where the line sits.

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” · Metabolism

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

All 132 magnesium capsules

Vitamin C

2 authorised claims · 106 capsules · ingredient page
  • “Vitamin C contributes to normal collagen formation for the normal function of skin” · Skin, hair and nails
  • “Vitamin C contributes to normal energy-yielding metabolism” · Metabolism

All 106 vitamin c capsules

Zinc

7 authorised claims · 71 capsules · ingredient page
  • “Zinc contributes to the maintenance of normal nails” · Skin, hair and nails
  • “Zinc contributes to the maintenance of normal skin” · Skin, hair and nails
  • “Zinc contributes to the maintenance of normal hair” · Skin, hair and nails
  • “Zinc contributes to normal carbohydrate metabolism” · Metabolism
  • and 3 more on the ingredient page

All 71 zinc capsules

Vitamin B6

3 authorised claims · 62 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

Not authorised for skin, hair and nails: the register refused 1 claim there.

All 62 vitamin b6 capsules

Folate

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

All 57 folate capsules

Biotin

4 authorised claims · 53 capsules · ingredient page
  • “Biotin contributes to the maintenance of normal hair” · Skin, hair and nails
  • “Biotin contributes to the maintenance of normal skin” · Skin, hair and nails
  • “Biotin contributes to normal energy-yielding metabolism” · Metabolism
  • “Biotin contributes to normal macronutrient metabolism” · Metabolism

Not authorised for skin, hair and nails: the register refused 1 claim there.

All 53 biotin capsules

Vitamin B12

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

Not authorised for skin, hair and nails: the register refused 1 claim there.

All 51 vitamin b12 capsules

Calcium

2 authorised claims · 28 capsules · ingredient page
  • “Calcium contributes to normal energy-yielding metabolism” · Metabolism
  • “Calcium contributes to the normal function of digestive enzymes” · Digestion

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

All 28 calcium capsules

Selenium

2 authorised claims · 28 capsules · ingredient page
  • “Selenium contributes to the maintenance of normal nails” · Skin, hair and nails
  • “Selenium contributes to the maintenance of normal hair” · Skin, hair and nails

All 28 selenium capsules

Iron

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

Not authorised for skin, hair and nails or metabolism: the register refused 2 claims there.

All 19 iron capsules

Niacin

2 authorised claims · 19 capsules · ingredient page
  • “Niacin contributes to the maintenance of normal skin” · Skin, hair and nails
  • “Niacin contributes to normal energy-yielding metabolism” · Metabolism

All 19 niacin capsules

Chromium

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

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

All 18 chromium capsules

Vitamin A

2 authorised claims · 18 capsules · ingredient page
  • “Vitamin A contributes to the maintenance of normal skin” · Skin, hair and nails
  • “Vitamin A contributes to normal iron metabolism” · Metabolism

Not authorised for skin, hair and nails: the register refused 1 claim there.

All 18 vitamin a capsules

Riboflavin

3 authorised claims · 17 capsules · ingredient page
  • “Riboflavin contributes to the maintenance of normal skin” · Skin, hair and nails
  • “Riboflavin contributes to normal energy-yielding metabolism” · Metabolism
  • “Riboflavin contributes to the normal metabolism of iron” · Metabolism

All 17 riboflavin capsules

Iodine

2 authorised claims · 16 capsules · ingredient page
  • “Iodine contributes to the maintenance of normal skin” · Skin, hair and nails
  • “Iodine contributes to normal energy-yielding metabolism” · Metabolism

Not authorised for skin, hair and nails: the register refused 1 claim there.

All 16 iodine capsules

Pantothenic Acid

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

All 14 pantothenic acid capsules

Choline

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

All 10 choline capsules

Copper

3 authorised claims · 10 capsules · ingredient page
  • “Copper contributes to normal hair pigmentation” · Skin, hair and nails
  • “Copper contributes to normal skin pigmentation” · Skin, hair and nails
  • “Copper contributes to normal energy-yielding metabolism” · Metabolism

All 10 copper capsules

Manganese

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

All 10 manganese capsules

Activated Charcoal

1 authorised claim · 8 capsules · ingredient page
  • “Activated charcoal contributes to reducing excessive flatulence after eating” · Digestion

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

All 8 activated charcoal capsules

Molybdenum

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

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

All 5 molybdenum capsules

Chloride

1 authorised claim · 2 capsules · ingredient page
  • “Chloride contributes to normal digestion by production of hydrochloric acid in the stomach” · Digestion

Phosphorus

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

Thiamine

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

Lactase enzyme

1 authorised claim · 1 capsule · ingredient page
  • “Lactase enzyme improves lactose digestion in individuals who have difficulty digesting lactose” · Digestion

Assessed by the register and not authorised

The register looked at claims for these relating to digestion and metabolism and skin, hair and nails 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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