The mineral is part of a larger compound
Supplemental magnesium is delivered in compounds that pair magnesium with another substance. In magnesium glycinate, the full compound weighs more than the magnesium portion alone.
That is why 2,500 mg of magnesium glycinate should not be read as 2,500 mg of magnesium. They describe different things: source-compound weight and elemental-mineral content.
What the facts panel declares
The NIH Office of Dietary Supplements explains that Supplement Facts panels declare elemental magnesium, not the weight of the entire magnesium-containing compound.
For DECLARED Magnesium Glycinate, one full serving is three capsules. The facts panel declares 275 mg of magnesium from 2,500 mg of magnesium glycinate. Read all three pieces together: amount, source, and serving size.
Why capsule count matters
A 90-capsule bottle may sound like a 90-day supply until the serving is checked. At three capsules per serving, this bottle contains 30 servings.
That does not tell you what serving is appropriate for you. It tells you exactly how the labeled product is structured, which is the starting point for a useful comparison or a conversation with a healthcare professional.
The limit of label arithmetic
A ratio between compound weight and elemental magnesium cannot, on its own, establish how a raw material was manufactured or whether it is buffered. Those are formulation and documentation questions—not conclusions to draw from arithmetic.
We publish the figures the current product record supports and avoid turning an inference into a product claim.
Sources
This material is for general educational purposes only and is not medical advice. Consult a qualified healthcare professional about your individual circumstances.