Proco Magnesium Glycinate — Sleep & Nervous System Support

Magnesium Glycinate supports nervous-system regulation, sleep quality and everyday stress resilience — a bioavailable, chelated form of magnesium that's gentle on the gut, not a synthetic sedative and not a proprietary "calm" blend. Every capsule is part of a fully disclosed 275mg elemental-magnesium dose from 2,500mg of magnesium glycinate: one ingredient, one number, the whole dose on the label. Most "calm" and "sleep support" products fold a smaller, unstated amount of magnesium into a blend of six or eight other ingredients — you can't tell how much of anything you're actually taking. Here, there's nothing to hide behind.*

Evidence reviewed: September 2026.

What the evidence actually shows

Sleep & nervous system — the complete evidence-based guide to magnesium, including a pooled meta-analysis of three randomized trials in 151 older adults that found magnesium supplementation cut time to fall asleep by about 17 minutes versus placebo. Read it here →

Why this form specifically — what the absorption evidence actually shows for glycinate vs. other forms. The one rigorous head-to-head trial that exists found citrate absorbed better than oxide; glycinate hasn't been tested directly against citrate yet, so we're not going to claim an absorption edge no trial has shown. We chose it for GI tolerability at a nightly dose, plus the glycine component's own separately studied role in sleep quality. Full evidence →

Anxiety & stress — what the evidence shows, and where it's thinner than marketing suggests. The best-designed trial here gave 264 adults with elevated stress and low blood magnesium 8 weeks of supplementation and recorded a 43–45% drop in self-reported stress scores, at daily doses of 250–400mg — the same range disclosed on this label. Full evidence →

Glycinate vs. citrate vs. threonate — which form for sleep, stress, or focus. Read the comparison →

Common questions

How long does it take to work? Full timeline →

Is it safe to take every day, long-term? What the evidence says →

Best time of day — morning or night? Full answer →

How do you back this up? Every batch is independently tested by a third-party lab, with the Certificate of Analysis available on request — one ingredient and one disclosed dose is easy to check for yourself. If it's not right for you, our 90-day money-back guarantee covers your first order, even opened. What a COA actually tells you →

Ingredients: Magnesium (from 2,500mg Magnesium Glycinate) 275mg, Hypromellose (capsule), Magnesium Stearate, Silicon Dioxide, Rice Flour.

Manufacturer Country: USA

Amount: 90 capsules

Gross Weight: 4oz / 0.25lb / 113g

Suggested Use: As a dietary supplement, take three (3) capsules once daily or as directed by your healthcare professional.

Caution: Do not exceed recommended dose. Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.

Warning: Keep out of reach of children. Do not use if the safety seal is damaged or missing. Store in a cool, dry place.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.