At 400mg per serving, you're getting **Magnesium** right at the top of the clinically studied supplemental range (100–400mg) — enough to meaningfully support muscle function, sleep quality, and energy production. Magnesium deficiency is extremely common, estimated to affect over half the population, so hitting a full clinical dose matters.

The formula uses a blend of Albion **Magnesium Glycinate Chelate** and **Magnesium Oxide**. The glycinate portion is a well-absorbed, stomach-friendly form — but the oxide absorbs poorly (roughly 4%). The label doesn't disclose how much of the 400mg comes from each form, so your actual absorbed dose depends on a ratio you can't see.

The tradeoff is pill burden: you need four tablets daily to reach that 400mg. If you struggle with multiple tablets, a powder or single-form glycinate product at a similar dose would be more practical.