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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.

Sleep and Bones and Muscles

1382 capsules across 54 ingredients

Sleep. Almost nothing holds an authorised GB register claim about sleep, and that absence is worth knowing in itself: sellers may not claim it either. Ingredients people discuss for sleep appear below with their actual register status, and The Sleep Charity offers evidence-based sleep advice.

Bones. Ingredients here hold register claims relating to the maintenance of normal bones, quoted exactly on their pages. Weight-bearing exercise and dietary calcium are the foundations, and the Royal Osteoporosis Society is the specialist charity for anything further.

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.

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

2 authorised claims · 334 capsules · ingredient page
  • “Magnesium contributes to the maintenance of normal bones” · Bones
  • “Magnesium contributes to normal muscle function” · Muscles

All 334 magnesium capsules

Vitamin C

1 authorised claim · 332 capsules · ingredient page
  • “Vitamin C contributes to normal collagen formation for the normal function of bones” · Bones

All 332 vitamin c capsules

Zinc

1 authorised claim · 249 capsules · ingredient page
  • “Zinc contributes to the maintenance of normal bones” · Bones

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

All 249 zinc capsules

Vitamin D

5 authorised claims · 232 capsules · ingredient page
  • “Vitamin D contributes to the maintenance of normal bones” · Bones
  • “Vitamin D is needed for normal growth and development of bone in children.” · Bones
  • “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.” · Bones
  • “Vitamin D contributes to the maintenance of normal muscle function” · Muscles
  • and 1 more on the ingredient page

All 232 vitamin d capsules

Vitamin K

1 authorised claim · 106 capsules · ingredient page
  • “Vitamin K contributes to the maintenance of normal bones” · Bones

All 106 vitamin k capsules

Calcium

4 authorised claims · 96 capsules · ingredient page
  • “Calcium helps to reduce the loss of bone mineral in post-menopausal women. Low bone mineral density is a risk factor for osteoporotic bone fractures” · Bones
  • “Calcium is needed for normal growth and development of bone in children.” · Bones
  • “Calcium is needed for the maintenance of normal bones” · Bones
  • “Calcium contributes to normal muscle function” · Muscles

All 96 calcium capsules

Manganese

1 authorised claim · 32 capsules · ingredient page
  • “Manganese contributes to the maintenance of normal bones” · Bones

All 32 manganese capsules

Potassium

1 authorised claim · 32 capsules · ingredient page
  • “Potassium contributes to normal muscle function” · Muscles

All 32 potassium capsules

creatine

2 authorised claims · 20 capsules · ingredient page
  • “Daily creatine consumption can enhance the effect of resistance training on muscle strength in adults over the age of 55.” · Muscles
  • “Creatine increases physical performance in successive bursts of short-term, high intensity exercise” · Muscles

Not authorised for muscles: the register refused 3 claims there.

All 20 creatine capsules

Phosphorus

2 authorised claims · 3 capsules · ingredient page
  • “Phosphorus contributes to the maintenance of normal bones” · Bones
  • “Phosphorus is needed for the normal growth and development of bone in children” · Bones

Protein

4 authorised claims · 1 capsule · ingredient page
  • “Protein contributes to the maintenance of normal bones” · Bones
  • “Protein contributes to a growth in muscle mass” · Muscles
  • “Protein contributes to the maintenance of muscle mass” · Muscles
  • “Protein is needed for normal growth and development of bone in children.” · Bones

Melatonin

2 authorised claims · ingredient page
  • “Melatonin contributes to the alleviation of subjective feelings of jet lag” · Sleep
  • “Melatonin contributes to the reduction of time taken to fall asleep” · Sleep

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

Melatonin is prescription only in the UK, so no merchant here lists it. It stays for information.

Assessed by the register and not authorised

The register looked at claims for these relating to sleep and bones and muscles 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

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