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Thorne

Thorne Basic B Complex — Active Forms, No Artificial Colours

88 / 100 Low-Tox Score
NSF Certified for Sport 3rd-party tested active B vitamin forms no artificial colour
$48.00 approx. — check brand site for current price

2 Brand-claimed certifications — disclosed on the brand's product page

3rd-Party Tested
3rd-Party Tested
Brand-wide certification
Brand-disclosed
Checked 2026-05-08T17:00:09.730Z

3 Database-verified certifications — 1 confirmed in official registries

NSF Certified for Sport
NSF International
1534512
Brand-wide certification
Database verified
Checked 2026-05-08T17:00:09.730Z View registry listing

External link to the brand's own product page. Listings are based on Lowtoxgear's low-tox scoring criteria — we do not certify products ourselves.

Why we list this: Most B-complex supplements use synthetic folic acid and cyanocobalamin — both require conversion to active forms that some people do inefficiently. Active form B vitamins are directly usable.

Key features

  • NSF Certified for Sport — batch tested
  • Active forms: methylfolate (not folic acid), methylcobalamin (not cyanocobalamin)
  • No riboflavin-5-phosphate artificial yellow colouring
  • No cyanocobalamin (requires extra conversion step in most people)
  • Minimal excipients: only leucine and hypromellose capsule