GNC Magnesium 500mg 120 Capsules Supports Calcium Absorption and Strong Teeth and Bones
Analysis updated September 2026 · How Scout scores
At a glance
Summary
This magnesium supplement contains magnesium oxide, which is a common form but has lower bioavailability compared to other forms like magnesium citrate or glycinate. The presence of magnesium stearate, a processed additive used as a flow agent, is a minor concern due to its potential to inhibit nutrient absorption. The formulation is relatively simple, but the choice of magnesium form and the use of magnesium stearate slightly impact its overall quality.
Key ingredients 6
MagnesiumGood
Magnesium is an essential mineral that supports numerous bodily functions, including muscle and nerve function, and bone health. It is often used in supplements to aid in calcium absorption and promote strong bones. Magnesium oxide is a common form used in supplements, though it may have lower bioavailability compared to other forms.
Risks
Excessive intake of magnesium can lead to digestive issues such as diarrhea.
Benefits
Magnesium is crucial for maintaining normal muscle and nerve function, supporting a healthy immune system, and keeping bones strong.
Microcrystalline CelluloseNeutral
Microcrystalline cellulose is a common filler and binder used in supplements to provide structure and stability. It is derived from plant fibers and is generally considered safe for consumption. It does not contribute any nutritional value but helps in the manufacturing process.
See more about Microcrystalline Cellulose →GelatinNeutral
Gelatin is used as a capsule material in supplements, providing a convenient delivery method for the active ingredients. It is derived from animal collagen and is generally safe for consumption. Gelatin does not contribute to the nutritional profile of the supplement.
See more about Gelatin →Stearic AcidNeutral
Stearic acid is a fatty acid used as a lubricant in supplement manufacturing to prevent ingredients from sticking to equipment. It is naturally found in animal and plant fats and is considered safe in small amounts. It does not affect the nutritional value of the supplement.
See more about Stearic Acid →Magnesium StearateNeutral
Standard formulation ingredient — neither beneficial nor harmful at typical use.
Risks
May inhibit the absorption of nutrients in some cases.
Vegetable SourceNeutral
The term 'vegetable source' is vague and typically refers to plant-derived ingredients used in supplements. Without specific details, it is difficult to assess its impact. It is generally considered neutral unless specific components are identified.
Processing
Processed Foods
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