Swanson Magnesium L-Threonate - Featuring Magtein 90 Veggie Capsules
Analysis updated June 2026 · How Scout scores
At a glance
Summary
This magnesium supplement uses a bioavailable form of magnesium, which is beneficial for absorption. However, the presence of magnesium stearate, while common, raises concerns about potential nutrient absorption issues. The product has a moderate level of processing with a few additives, which slightly impacts its overall score.
Key ingredients 5
Brown Rice FlourGood
Beneficial ingredient — whole-food or functional value in this product class.
Benefits
Provides minor amounts of fiber and nutrients, but not significant in the context of a supplement.
HypromelloseNeutral
Hypromellose is a plant-derived cellulose used as a capsule material and stabilizer. It is widely used in the pharmaceutical industry for its ability to form a gel-like consistency, aiding in controlled release of active ingredients. It is considered neutral as it does not contribute nutritional value or significant health risks.
Benefits
Helps in the controlled release of active ingredients, enhancing the effectiveness of the supplement.
Calcium PalmitateNeutral
Calcium palmitate is used as a flow agent in supplements to prevent clumping. It is a calcium salt of palmitic acid, a common saturated fatty acid. While it does not provide significant nutritional benefits, it is generally recognized as safe in small amounts used in supplements.
Microcrystalline CelluloseNeutral
Microcrystalline cellulose is a refined wood pulp used as a texturizer, anti-caking agent, and bulking agent. It is inert and does not provide nutritional value, but it helps maintain the consistency and stability of the supplement. It is considered neutral due to its lack of significant health impact.
See more about Microcrystalline Cellulose →Magnesium StearateNeutral
Standard formulation ingredient — neither beneficial nor harmful at typical use.
Risks
May inhibit nutrient absorption and potentially form biofilms in the intestines.
Processing
Processed Foods
Get the full breakdown in the Scout appTake Scout shopping
Scan any product to see lab results, healthy alternatives, and your personalized analysis.
Download on theApp Store GET IT ONGoogle PlayAmazon pricing & content
Amazon price as of . Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED “AS IS” AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.