Magnesium Bisglycinate

Name: Magnesium Bisglycinate
Brand: Thorne

PFR Grade

Excellent — minimal plastic, transparent materials, safe for daily use

NSF Certified for Sport. No artificial colors, no titanium dioxide, no synthetic fillers. Thorne is trusted by professional athletes and healthcare practitioners for clean supplement formulations.

PFR Approved

Magnesium bisglycinate supplement. NSF Certified for Sport. No artificial colors, no titanium dioxide, no synthetic fillers.

Score Breakdown

How scores are calculated

Materials (40%): How plastic-free the product is — raw materials, construction, and coatings.

Packaging (20%): Is the product packaged in plastic? Is it recyclable?

Transparency (20%): Does the brand disclose ingredients, sourcing, and manufacturing?

Durability (20%): How long does it last? Longer-lasting products reduce plastic waste over time.

Materials

Packaging

Transparency

Durability

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Last updated: April 6, 2026

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Moderate Exposure Risk — Why This Product Category Matters

Supplement capsules and tablets are often made from gelatin, hydroxypropyl methylcellulose (HPMC), or titanium dioxide. The supplement industry has less regulatory oversight than pharmaceuticals, and many products contain undisclosed additives including titanium dioxide (banned in EU food products), artificial colors, and synthetic fillers.

Why We Recommend This Product

Thorne's NSF Certified for Sport magnesium is one of the most rigorously tested supplements available. NSF Certification verifies the supplement contains what the label says and is free from banned substances. No synthetic additives.