Magnesium at 250mg with extended-release technology (ZumXR) is 63% of optimal 400mg but above minimum effective. The extended release is smart for magnesium absorption. Potassium at 99mg hits the FDA-mandated supplement limit. The magnesium is the real star here, and it delivers well.
The set is generated, never written by the brand.
Life Extension Potassium with Extend-Release Magnesium: the formulation holds up. Lead: Magnesium at 250 mg. Magnesium at 250mg with extended-release technology (ZumXR) is 63% of optimal 400mg but above minimum effective. Clinical dose on the primary, and the panel holds together.
Daily magnesium supplementation with a trace amount of potassium support.. The magnesium component is well-dosed and uses a premium, extended-release form. However, the potassium dose is negligible due to regulatory limits, making it ineffective for meaningful potassium supplementation. This significant weakness pulls the overall score down per the hero product rule.
2 of 2 shown, 1 dose at what the trials used
Also on the label (inactive): vegetable cellulose (capsule), ethylcellulose, microcrystalline cellulose, medium chain triglycerides, stearic acid, rice concentrate, hypromellose, oleic acid, silica
This read comes from the product's own supplement facts panel. Every dose was cross-referenced with published clinical trials to see whether it matches what the studies actually used.
