Skip to content
BestCapsules

Find capsules by goal

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.

What do you want help with?

Where the register allows less than sellers suggest

Anything you already take or are considering?

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”.

Preferences

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

Blood and iron and Tiredness and fatigue and Blood sugar

546 capsules across 38 ingredients

Blood and iron. Ingredients here hold register wording about normal red blood cell formation, oxygen transport, iron absorption or normal blood clotting, quoted exactly on their pages. Suspected iron deficiency needs a blood test before a supplement; the NHS page below explains why.

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.

Blood sugar. A small number of ingredients hold authorised register wording about normal blood glucose levels, quoted exactly on their pages; a much larger number of claims about blood sugar were assessed and refused. Nothing here is about treating or preventing diabetes, and anyone managing blood glucose should follow their care team's advice. Diabetes UK is the specialist charity.

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 a reduction of tiredness and fatigue” · Tiredness and fatigue

Not authorised for blood and iron or blood sugar: the register refused 2 claims there.

All 132 magnesium capsules

Vitamin C

2 authorised claims · 106 capsules · ingredient page
  • “Vitamin C contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue
  • “Vitamin C increases iron absorption” · Blood and iron

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

All 106 vitamin c capsules

Vitamin B6

2 authorised claims · 62 capsules · ingredient page
  • “Vitamin B6 contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue
  • “Vitamin B6 contributes to normal red blood cell formation” · Blood and iron

All 62 vitamin b6 capsules

Folate

2 authorised claims · 57 capsules · ingredient page
  • “Folate contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue
  • “Folate contributes to normal blood formation” · Blood and iron

All 57 folate capsules

Vitamin B12

2 authorised claims · 51 capsules · ingredient page
  • “Vitamin B12 contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue
  • “Vitamin B12 contributes to normal red blood cell formation” · Blood and iron

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

All 51 vitamin b12 capsules

Vitamin K

1 authorised claim · 39 capsules · ingredient page
  • “Vitamin K contributes to normal blood clotting” · Blood and iron

All 39 vitamin k capsules

Calcium

1 authorised claim · 28 capsules · ingredient page
  • “Calcium contributes to normal blood clotting” · Blood and iron

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

All 28 calcium capsules

Iron

3 authorised claims · 19 capsules · ingredient page
  • “Iron contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue
  • “Iron contributes to normal formation of red blood cells and haemoglobin” · Blood and iron
  • “Iron contributes to normal oxygen transport in the body” · Blood and iron

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

Chromium

1 authorised claim · 18 capsules · ingredient page
  • “Chromium contributes to the maintenance of normal blood glucose levels” · Blood sugar

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

All 18 chromium capsules

Riboflavin

2 authorised claims · 17 capsules · ingredient page
  • “Riboflavin contributes to the reduction of tiredness and fatigue” · Tiredness and fatigue
  • “Riboflavin contributes to the maintenance of normal red blood cells” · Blood and iron

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

Copper

1 authorised claim · 10 capsules · ingredient page
  • “Copper contributes to normal iron transport in the body” · Blood and iron

Not authorised for blood sugar or tiredness and fatigue: the register refused 2 claims there.

All 10 copper capsules

Assessed by the register and not authorised

The register looked at claims for these relating to blood and iron and tiredness and fatigue and blood sugar 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

Independent organisations for support and reliable information; none endorses any product on this site.