
Pure Encapsulations
Magnesium (Glycinate)
Amazon's No. 1 magnesium: 120 mg of magnesium glycinate per capsule in a minimal, allergen-free formula that is gentle on the gut but pricey per milligram.
Brand profile
Pure Encapsulations is a practitioner-focused supplement brand that began as a small family start-up and now has more than 30 years of history and over 400 products. It researches, develops and manufactures in its own facility in Sudbury, Massachusetts, and sells to consumers through its Pure For You store, Amazon and TikTok Shop. The brand is known for hypoallergenic formulas that avoid unnecessary additives and common allergens.
Average score
Across 1 product
Testing & quality
The company says it follows cGMP procedures at its FDA-inspected plant, tests raw materials for identity, potency, microbes, heavy metals, solvents and allergens, and uses accredited outside laboratories; many products are certified gluten-free by GFCO.

Pure Encapsulations
Amazon's No. 1 magnesium: 120 mg of magnesium glycinate per capsule in a minimal, allergen-free formula that is gentle on the gut but pricey per milligram.
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