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Thorne Magnesium Bisglycinate — Clean Formula, No Fillers
Thorne

Thorne Magnesium Bisglycinate — Clean Formula, No Fillers

91 / 100 Low-Tox Score
NSF Certified for Sport 3rd-party tested no magnesium stearate clean excipients only
$52.00 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
1507934
Brand-wide certification
Database verified
Checked 2026-05-08T17:00:09.730Z View registry listing
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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: NSF Certified for Sport is currently the most rigorous supplement certification available — it requires independent testing of every batch for heavy metals, banned substances and label accuracy. Most magnesium supplements lack any third-party testing.

Key features

  • NSF Certified for Sport — tested for 270+ banned substances and contaminants
  • No magnesium stearate, no silicon dioxide, no titanium dioxide
  • Bisglycinate form has superior absorption vs oxide or citrate
  • Capsule shell: hypromellose (plant-based) only
  • Thorne manufactures in NSF-registered facilities