Magnesium Glycinate Dosage Chart
Magnesium glycinate (also called magnesium bisglycinate) is chelated with glycine, an amino acid with calming properties. It has excellent bioavailability, minimal laxative effect, and is the preferred form for improving sleep quality and reducing muscle tension.
Magnesium Glycinate Dosage by Age Group
| Age Group | Age Range | Dose Range | Notes |
|---|---|---|---|
| Adults — general supplement | 18–64 years | 200–400 mg | Elemental magnesium per day |
| Adults — sleep support | 18–64 years | 200–400 mg | Take 1–2 hours before bed |
| Adults — anxiety / muscle tension | 18–64 years | 300–400 mg | Morning + evening split dose |
| Seniors (65+) | 65+ years | 200–320 mg | Start low; monitor for loose stools |
When and how to take Magnesium Glycinate
For sleep support, take 1–2 hours before bed. For general supplementation, take with a meal. Split doses (morning/evening) are useful for higher amounts (350+ mg/day).
Available Forms
Most common form. Check label for elemental magnesium content — products vary.
Typical: 100–200 mg elemental Mg per 2 capsules
Mix with water or a smoothie. Faster absorption.
Often combined with other relaxing minerals
Safety Cautions
- Upper intake level (UL) for supplemental magnesium is 350 mg/day — do not exceed without medical guidance.
- Glycinate is the gentlest form but still causes loose stools if you exceed your personal tolerance.
- Avoid if you have kidney impairment — consult a physician.
- May potentiate the effect of muscle relaxants and certain psychiatric medications.
Frequently Asked Questions
How much magnesium glycinate should I take for sleep?
Most sleep-support studies use 200–400 mg elemental magnesium glycinate taken 1–2 hours before bed. Start at 200 mg and increase only if needed. The glycine component also has direct calming effects.
Is magnesium glycinate the same as magnesium bisglycinate?
Yes. Magnesium glycinate and magnesium bisglycinate refer to the same compound — magnesium chelated to two glycine molecules. Some labels use 'bisglycinate' to emphasize this double-chelation, which may improve stability and absorption.
Can I take magnesium glycinate and melatonin together?
Yes, many people combine 200–400 mg magnesium glycinate with 0.5–3 mg melatonin for sleep. Both are generally safe to combine. Start with the lower doses of each and assess tolerance.
Sources & References
- NIH Office of Dietary Supplements — Magnesium Fact Sheet
- Boyle NB et al., Nutrients 2017 — Magnesium and Stress
- Abbasi B et al., J Res Med Sci 2012 — Magnesium and insomnia