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 Mood and Testosterone

1109 capsules across 20 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.

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.

Testosterone. Only a small number of ingredients hold register claims mentioning testosterone, and this page quotes them exactly. Claims in this category are heavily marketed well beyond what the register authorises; the split below shows the line.

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 · 108 capsules · ingredient page
  • “Magnesium contributes to normal psychological function” · Mood

Not authorised for blood and iron: the register refused 1 claim there.

All 108 magnesium capsules

Vitamin C

2 authorised claims · 68 capsules · ingredient page
  • “Vitamin C contributes to normal psychological function” · Mood
  • “Vitamin C increases iron absorption” · Blood and iron

All 68 vitamin c capsules

Zinc

1 authorised claim · 53 capsules · ingredient page
  • “Zinc contributes to the maintenance of normal testosterone levels in the blood” · Testosterone

All 53 zinc capsules

Vitamin B6

2 authorised claims · 44 capsules · ingredient page
  • “Vitamin B6 contributes to normal psychological function” · Mood
  • “Vitamin B6 contributes to normal red blood cell formation” · Blood and iron

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

All 44 vitamin b6 capsules

Biotin

1 authorised claim · 38 capsules · ingredient page
  • “Biotin contributes to normal psychological function” · Mood

All 38 biotin capsules

Vitamin B12

2 authorised claims · 34 capsules · ingredient page
  • “Vitamin B12 contributes to normal psychological function” · Mood
  • “Vitamin B12 contributes to normal red blood cell formation” · Blood and iron

All 34 vitamin b12 capsules

Folate

2 authorised claims · 30 capsules · ingredient page
  • “Folate contributes to normal psychological function” · Mood
  • “Folate contributes to normal blood formation” · Blood and iron

All 30 folate capsules

Calcium

1 authorised claim · 26 capsules · ingredient page
  • “Calcium contributes to normal blood clotting” · Blood and iron

All 26 calcium capsules

Vitamin K

1 authorised claim · 20 capsules · ingredient page
  • “Vitamin K contributes to normal blood clotting” · Blood and iron

All 20 vitamin k capsules

Iron

2 authorised claims · 17 capsules · ingredient page
  • “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 17 iron capsules

Copper

1 authorised claim · 13 capsules · ingredient page
  • “Copper contributes to normal iron transport in the body” · Blood and iron

All 13 copper capsules

Riboflavin

1 authorised claim · 11 capsules · ingredient page
  • “Riboflavin contributes to the maintenance of normal red blood cells” · Blood and iron

All 11 riboflavin capsules

Niacin

1 authorised claim · 10 capsules · ingredient page
  • “Niacin contributes to normal psychological function” · Mood

All 10 niacin capsules

Assessed by the register and not authorised

The register looked at claims for these relating to blood and iron and mood and testosterone 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.