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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.

  • 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.

Digestion and Muscles and Weight

69 capsules across 23 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.

Muscles. Ingredients here hold register claims relating to normal muscle function or muscle protein, quoted exactly on their pages. Resistance exercise and overall protein intake are the fundamentals the claims assume; the NHS exercise guidance below is a good starting point.

Weight. The register takes a strict line on weight claims, and very little is authorised. This page shows the real status of ingredients people discuss for weight, quoted exactly. The NHS Better Health programme below is the evidence-based starting point.

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 D

2 authorised claims · 22 capsules · ingredient page
  • “Vitamin D contributes to the maintenance of normal muscle function” · Muscles
  • “Vitamin D helps to reduce the risk of falling associated with postural instability and muscle weakness. Falling is a risk factor for bone fractures among men and women 60 years of age and older.” · Muscles

All 22 vitamin d capsules

Magnesium

1 authorised claim · 18 capsules · ingredient page
  • “Magnesium contributes to normal muscle function” · Muscles

All 18 magnesium capsules

Calcium

2 authorised claims · 5 capsules · ingredient page
  • “Calcium contributes to normal muscle function” · Muscles
  • “Calcium contributes to the normal function of digestive enzymes” · Digestion

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

All 5 calcium capsules

sugar beet fibre

1 authorised claim · 4 capsules · ingredient page
  • “Sugar beet fibre contributes to an increase in faecal bulk” · Digestion

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

All 4 sugar beet fibre capsules

Chloride

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

Glucomannan

1 authorised claim · 1 capsule · ingredient page
  • “Glucomannan in the context of an energy restricted diet contributes to weight loss” · Weight

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

Potassium

1 authorised claim · 1 capsule · ingredient page
  • “Potassium contributes to normal muscle function” · Muscles

Assessed by the register and not authorised

The register looked at claims for these relating to digestion and muscles and weight 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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