Use this calculator to plan how many Pure Encapsulations Magnesium Glycinate 120mg capsules and bottles you’ll need for a given time period, and see the estimated cost based on the current 180-count bottle price.
Magnesium (Glycinate) Dosage & Cost Calculator
Based on the labeled dose options for Pure Encapsulations Magnesium Glycinate 120mg and the published 180-count bottle at $46.50.
Estimate only – based on the current listed price of the 180-count Pure Encapsulations Magnesium Glycinate 120mg bottle. Actual Amazon price can change; check the live price before buying.
Why no height/weight input? Unlike per-kg supplements (creatine, protein), Magnesium (Glycinate) has no published bodyweight-adjusted dosing in the research behind it. This calculator doesn't fabricate a per-kg formula that doesn't exist in the literature.
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This product’s label allows 1–4 capsules daily (120–480 mg elemental magnesium), in divided doses with food.
A 2025 randomized, double-blind, placebo-controlled trial of 155 adults with self-reported poor sleep tested magnesium bisglycinate at 250 mg elemental magnesium/day — the same form as this product, and close to the 240 mg (2-capsule) option above. The magnesium group showed a significantly greater reduction in insomnia severity scores versus placebo over 4 weeks, though the effect size was small [1]. The trial also found the effect was strongest in people with lower baseline dietary magnesium intake, suggesting it may matter more if your diet is already low in magnesium.
As with the other calculators on our network, there’s no published bodyweight-adjusted dosing for magnesium glycinate, so this tool plans by a fixed daily amount rather than your height or weight.
References
- Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial. Nature and Science of Sleep, 2025