NOW Foods Supplements Magtein Magnesium L-Threonate Cognitive Support* 180 Veg Capsules
Analysis updated September 2026 · How Scout scores
At a glance
Summary
This supplement features magnesium L-threonate, a bioavailable form of magnesium known for its cognitive benefits, which is a strong positive aspect. The formulation is clean with minimal additives, including a cellulose capsule and rice flour, which are generally considered benign. The absence of artificial sweeteners, dyes, and harmful preservatives contributes to its high rating.
Key ingredients 5
MagteinGood
Magtein, or magnesium L-threonate, is a form of magnesium that is believed to enhance cognitive function and support brain health. It is specifically designed to cross the blood-brain barrier more effectively than other forms of magnesium. This makes it a valuable ingredient for cognitive support supplements.
Benefits
It may improve memory and cognitive function by increasing magnesium levels in the brain.
HypromelloseNeutral
Hypromellose is a cellulose-based compound used as a capsule material in supplements. It is considered safe and is commonly used as a vegetarian alternative to gelatin capsules. It does not contribute any nutritional value but is effective in delivering the active ingredients.
Benefits
Provides a vegetarian-friendly capsule option for supplement delivery.
Rice FlourNeutral
Rice flour is often used as a filler or flow agent in supplements. It is a gluten-free option that is generally well-tolerated by most individuals. While it does not offer significant nutritional benefits, it is a benign ingredient in small amounts.
Benefits
Acts as a natural filler and is suitable for those with gluten sensitivities.
Stearic AcidNeutral
Stearic acid is a fatty acid used as a lubricant in supplement manufacturing. It is derived from vegetable sources and is generally recognized as safe. It does not provide nutritional benefits but aids in the manufacturing process.
Benefits
Facilitates the manufacturing process by preventing ingredients from sticking to equipment.
Silicon DioxideNeutral
Silicon dioxide is used as an anti-caking agent in supplements to prevent clumping. It is a naturally occurring compound and is considered safe for consumption in small amounts. It does not offer nutritional benefits but ensures product consistency.
Benefits
Helps maintain the free-flowing nature of powdered supplements.
Processing
Ultra-Processed Foods
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