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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.

Teeth and gums and Mood and Muscles and Sleep

1329 capsules across 49 ingredients

Teeth and gums. The register authorises wording about the maintenance of normal teeth for several minerals and vitamins, quoted exactly on their pages. Brushing, fluoride and regular check-ups do the real work; the Oral Health Foundation is the specialist charity.

Mood. The register authorises wording for some nutrients relating to normal psychological function, and this page shows which, quoted exactly. Low mood that persists deserves real support rather than a capsule; Mind's information and helplines below are a good place to start.

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.

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.

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

3 authorised claims · 334 capsules · ingredient page
  • “Magnesium contributes to normal muscle function” · Muscles
  • “Magnesium contributes to normal psychological function” · Mood
  • “Magnesium contributes to the maintenance of normal teeth” · Teeth and gums

All 334 magnesium capsules

Vitamin C

3 authorised claims · 332 capsules · ingredient page
  • “Vitamin C contributes to normal psychological function” · Mood
  • “Vitamin C contributes to normal collagen formation for the normal function of gums” · Teeth and gums
  • “Vitamin C contributes to normal collagen formation for the normal function of teeth” · Teeth and gums

All 332 vitamin c capsules

Vitamin D

3 authorised claims · 232 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
  • “Vitamin D contributes to the maintenance of normal teeth” · Teeth and gums

All 232 vitamin d capsules

Vitamin B6

1 authorised claim · 185 capsules · ingredient page
  • “Vitamin B6 contributes to normal psychological function” · Mood

Not authorised for teeth and gums or mood: the register refused 2 claims there.

All 185 vitamin b6 capsules

Vitamin B12

1 authorised claim · 163 capsules · ingredient page
  • “Vitamin B12 contributes to normal psychological function” · Mood

Not authorised for teeth and gums: the register refused 1 claim there.

All 163 vitamin b12 capsules

Folate

1 authorised claim · 138 capsules · ingredient page
  • “Folate contributes to normal psychological function” · Mood

All 138 folate capsules

Biotin

1 authorised claim · 124 capsules · ingredient page
  • “Biotin contributes to normal psychological function” · Mood

Not authorised for teeth and gums: the register refused 1 claim there.

All 124 biotin capsules

Calcium

2 authorised claims · 96 capsules · ingredient page
  • “Calcium contributes to normal muscle function” · Muscles
  • “Calcium is needed for the maintenance of normal teeth” · Teeth and gums

All 96 calcium capsules

Niacin

1 authorised claim · 46 capsules · ingredient page
  • “Niacin contributes to normal psychological function” · Mood

All 46 niacin 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

Thiamine

1 authorised claim · 5 capsules · ingredient page
  • “Thiamine contributes to normal psychological function” · Mood

All 5 thiamine capsules

Phosphorus

1 authorised claim · 3 capsules · ingredient page
  • “Phosphorus contributes to the maintenance of normal teeth” · Teeth and gums

Protein

2 authorised claims · 1 capsule · ingredient page
  • “Protein contributes to a growth in muscle mass” · Muscles
  • “Protein contributes to the maintenance of muscle mass” · Muscles

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 teeth and gums and mood and muscles and sleep 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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