Overview
Magnesium Glycinate is tracked as a supplement in Milligram's compound library. Chelated magnesium bound to glycine.
With a half-life of ~6 hours, Magnesium Glycinate requires daily administration in most observed protocols. Taken orally, it has a bioavailability of approximately 80% via its primary route.
Plasma half-life approximately 6 hours. High oral bioavailability (~80%) relative to other magnesium salts. One-compartment model.
Mechanism of Action
Magnesium Glycinate's pharmacological activity involves the following key pathways:
Primary Mechanism
Magnesium Glycinate exerts its effects through its established pharmacological pathway. Its mechanism has been characterized in published research.
Bioavailability Profile
Magnesium Glycinate has high oral bioavailability, which influences dosing strategy and administration timing.
Dosing Protocols
The following protocols represent commonly observed dosing patterns. These are observational summaries, not recommendations.
Dose
200 mg/day
Route
Oral
Frequency
Once daily
Duration
Ongoing
Dose
400 mg/day
Route
Oral
Frequency
Once daily
Duration
Ongoing
Frequently Asked Questions
What is Magnesium Glycinate and why is it different from other forms?
Magnesium Glycinate (also called magnesium bisglycinate) is a chelated form of magnesium bound to the amino acid glycine. This chelation gives it significantly higher absorption rates (50–80%) compared to magnesium oxide (~4%) or magnesium citrate. The glycine component also has its own calming properties, contributing to the compound's reputation for sleep and relaxation support. Evidence suggests it may be partially absorbed intact as a dipeptide, bypassing some of the absorption limitations of ionic magnesium.
How long does Magnesium Glycinate take to improve sleep?
Subtle effects on muscle tension and relaxation are commonly reported within the first few days. A large placebo-controlled trial found that magnesium bisglycinate produced statistically significant improvements in insomnia severity scores. Measurable improvements in sleep quality and onset latency are typically observed after 2–4 weeks of consistent daily dosing at 200–400 mg of elemental magnesium.
What is the best time to take Magnesium Glycinate?
Magnesium Glycinate is most commonly taken 1–2 hours before bedtime when sleep support is the primary goal. The glycine component has documented effects on sleep quality, and the relaxation effects of magnesium on smooth muscle and the nervous system support this timing. For recovery and general health, timing is less critical — consistent daily intake matters more than the specific hour.
Does Magnesium Glycinate cause digestive issues?
Magnesium Glycinate is the best-tolerated form of supplemental magnesium for gastrointestinal comfort. Unlike magnesium oxide and magnesium citrate, which draw water into the intestines and commonly cause loose stools, the chelated glycinate form is absorbed through a different pathway and has minimal osmotic laxative effect. Digestive side effects at standard doses of 200–400 mg/day are uncommon.
How much elemental magnesium is in Magnesium Glycinate?
Magnesium Glycinate contains approximately 14% elemental magnesium by weight. This means a supplement labeled as 2000 mg of magnesium glycinate provides approximately 280 mg of elemental magnesium. When dosing targets refer to 200–400 mg/day, this refers to elemental magnesium content, not the total weight of the chelated compound. Always check the supplement label for the elemental magnesium amount.
Can Magnesium Glycinate help with muscle cramps and recovery?
Magnesium plays a critical role in muscle contraction and relaxation, nerve transmission, and electrolyte balance. Deficiency is associated with increased muscle cramping, poor recovery, and elevated exercise-induced inflammation. Supplementation at 200–400 mg/day has been observed to reduce exercise-related muscle soreness and cramping frequency, particularly in individuals with suboptimal magnesium status, which is estimated to affect over 50% of the population.