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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 Muscles and Tiredness and fatigue

532 capsules across 46 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.

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.

Tiredness and fatigue. The register's phrase is 'a reduction of tiredness and fatigue', and a surprising number of everyday nutrients hold that authorised wording. This page shows which, quoted exactly, alongside ingredients people discuss without an authorised claim. Persistent tiredness is worth raising with a GP; the NHS link below covers self-help basics.

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 · 132 capsules · ingredient page
  • “Magnesium contributes to a reduction of tiredness and fatigue” · Tiredness and fatigue
  • “Magnesium contributes to normal muscle function” · Muscles
  • “Magnesium contributes to the maintenance of normal teeth” · Teeth and gums

All 132 magnesium capsules

Vitamin C

3 authorised claims · 106 capsules · ingredient page
  • “Vitamin C contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue
  • “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

Not authorised for tiredness and fatigue: the register refused 1 claim there.

All 106 vitamin c capsules

Vitamin D

3 authorised claims · 76 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 76 vitamin d capsules

Vitamin B6

1 authorised claim · 62 capsules · ingredient page
  • “Vitamin B6 contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

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

All 62 vitamin b6 capsules

Folate

1 authorised claim · 57 capsules · ingredient page
  • “Folate contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

All 57 folate capsules

Vitamin B12

1 authorised claim · 51 capsules · ingredient page
  • “Vitamin B12 contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

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

All 51 vitamin b12 capsules

Calcium

2 authorised claims · 28 capsules · ingredient page
  • “Calcium contributes to normal muscle function” · Muscles
  • “Calcium is needed for the maintenance of normal teeth” · Teeth and gums

Not authorised for tiredness and fatigue: the register refused 1 claim there.

All 28 calcium capsules

Iron

1 authorised claim · 19 capsules · ingredient page
  • “Iron contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

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

All 19 iron capsules

Niacin

1 authorised claim · 19 capsules · ingredient page
  • “Niacin contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

All 19 niacin capsules

Potassium

1 authorised claim · 17 capsules · ingredient page
  • “Potassium contributes to normal muscle function” · Muscles

All 17 potassium capsules

Riboflavin

1 authorised claim · 17 capsules · ingredient page
  • “Riboflavin contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

All 17 riboflavin capsules

Pantothenic Acid

1 authorised claim · 14 capsules · ingredient page
  • “Pantothenic acid contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue

All 14 pantothenic acid capsules

creatine

2 authorised claims · 10 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 or tiredness and fatigue: the register refused 4 claims there.

All 10 creatine capsules

Phosphorus

1 authorised claim · 2 capsules · ingredient page
  • “Phosphorus contributes to the maintenance of normal teeth” · Teeth and gums

Not authorised for tiredness and fatigue: the register refused 1 claim there.

Assessed by the register and not authorised

The register looked at claims for these relating to teeth and gums and muscles and tiredness and fatigue 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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