Magnesium Oxide 400mg – Once Daily Mineral Formula that supports energy production & muscle relaxation Promotes Regularity (200 Capsules) by The Vitamin Shoppe
Analysis updated August 2026 · How Scout scores
At a glance
Summary
This magnesium supplement uses magnesium oxide, which is a cost-effective form but has lower bioavailability compared to other forms like magnesium citrate. The product contains several additives such as silicon dioxide and stearic acid, which are common in supplements but contribute to a moderate level of processing. While it lacks harmful ingredients, the presence of multiple additives and the choice of magnesium form slightly reduce its overall score.
Key ingredients 7
Magnesium OxideGood
Magnesium oxide is a common form of magnesium used in supplements to support energy production and muscle relaxation. It is a cost-effective source of magnesium, although it has lower bioavailability compared to other forms like magnesium citrate. Despite this, it is effective for those needing to increase magnesium intake.
Benefits
Supports energy production, muscle relaxation, and promotes regularity.
CornGood
Beneficial ingredient — whole-food or functional value in this product class.
See more about Corn →Silicon DioxideNeutral
Silicon dioxide is used as an anti-caking agent to prevent clumping in powdered supplements. It is generally recognized as safe and is commonly used in food and supplements. It does not contribute any nutritional value.
See more about Silicon Dioxide →Stearic AcidNeutral
Stearic acid is a fatty acid used as a lubricant in supplement manufacturing. It is naturally occurring and considered safe for consumption. It does not affect the efficacy of the active ingredients.
See more about Stearic Acid →Croscarmellose SodiumNeutral
Croscarmellose sodium is a disintegrant used to help tablets dissolve and release their active ingredients. It is widely used in the pharmaceutical industry and considered safe. It does not provide any nutritional benefits.
See more about Croscarmellose Sodium →Microcrystalline CelluloseNeutral
Microcrystalline cellulose is a common filler and binder in supplements, providing structure to tablets. It is derived from plant fibers and is considered safe for consumption. It does not contribute any nutritional value.
See more about Microcrystalline Cellulose →StarchNeutral
Starch is used as a filler and binder in supplements, providing bulk and stability. It is a carbohydrate derived from plants and is generally recognized as safe. It does not provide significant nutritional benefits in this context.
Processing
Processed Foods
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