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😴 Cortisol wakes you up at 3am. Melatonin is meant to be carrying you through the night. When magnesium is low, those two hormones go the wrong way. Cortisol stays high. Melatonin drops. You wake up wired and can't get back to sleep. A placebo-controlled trial in 46 older adults with insomnia took 500mg of magnesium daily for 8 weeks. The result: cortisol came down. Melatonin went up. Insomnia severity scores improved alongside both. When magnesium is low: → Cortisol stays elevated overnight (3am wake-ups) → Melatonin production drops (can't fall asleep, can't stay asleep) → Your nervous system can't shift into rest mode → Sleep quality suffers even when total hours look OK Magnesium fixes all three. But only if you're actually absorbing it. Cheap magnesium uses low-absorption forms at tiny doses. That's why most people try it and feel nothing. Biosphere Magnesium is built differently: ✅ 400mg therapeutic dose per serve ✅ 3 highly bioavailable forms: Glycinate, Citrate, Malate ✅ Powder format for faster absorption ✅ Heavy metal tested every batch ⭐ 4.8/5 from 850+ Kiwi reviews 🔁 64% of customers reorder within 90 days 🛡️ 60-day money-back guarantee. Sleep improves or full refund. Study: Abbasi B et al. Journal of Research in Medical Sciences, 2012. https://pmc.ncbi.nlm.nih.gov/articles/PMC3703169/ Less than $0.94 a day. 20% off with code MAG20 👇