Magnesium Glycinate vs Citrate: An Evidence-Based Comparison
Both are well-absorbed magnesium forms, but they behave differently in the gut and suit different goals. Glycinate is the gentle, sleep-oriented form; citrate is the versatile everyday form with a mild osmotic (laxative) effect at higher doses. Here is the comparison from the indexed data.
Last reviewed July 16, 2026 · Reviewed by the SuppIndex research team (editorial policy) · Educational only — not medical advice.
The 30-second answer
- Sleep & relaxation: Glycinate leads — the glycine component itself supports sleep onset, and it is the form favoured in evening protocols.
- Digestion: Citrate has a mild osmotic effect that can loosen stools — useful if you tend toward constipation, unwanted otherwise. Glycinate is the gentler choice for sensitive stomachs.
- Evidence base: Glycinate grades Strong (84/100) on SuppIndex; citrate grades Moderate (70/100). Both effectively correct low magnesium status.
- Verdict: Default to glycinate for sleep, stress and sensitive digestion; choose citrate for general repletion at lower cost or when mild regularity support is a plus. Either way, dose by elemental magnesium (see table).
Side-by-side comparison
| Magnesium Glycinate | Magnesium Citrate | |
|---|---|---|
| Evidence score | 84/100 (Strong) | 70/100 (Moderate) |
| Indexed studies | 3 | 1 |
| Sleep | 5/5 | 3/5 |
| Recovery | 4/5 | 3/5 |
| Stress | 4/5 | — |
| General Health | 4/5 | 4/5 |
| Optimal dose | 200–400mg elemental magnesium daily | 300–400 mg elemental Mg/day |
| Timing | Evening (1–2 hours before bed) for sleep. Split doses for general use. | Evening (sleep support) or split doses |
| Category | Minerals | Minerals |
Goal ratings and dosage figures come from the SuppIndex ingredient database — see the Magnesium Glycinate and Magnesium Citrate pages for full evidence reviews, or open this comparison in the interactive tool.
Key studies
Magnesium Glycinate
- The effect of magnesium supplementation on sleep quality: a systematic review (2022, Systematic Review). PubMed 35184264
- Bioavailability of magnesium amino acid chelates compared to inorganic salts (2019, RCT). PubMed 31064099
- Effects of magnesium supplementation on blood pressure: meta-analysis of randomized trials (2017, Meta-Analysis). PubMed 27815443
Magnesium Citrate
- Magnesium bioavailability from magnesium citrate and magnesium oxide (2003, RCT). PubMed 14596323
Frequently asked questions
Does Magnesium Glycinate or Magnesium Citrate have stronger evidence?
On SuppIndex's 0–100 evidence grading, Magnesium Glycinate scores 84/100 (Strong) across 3 indexed studies, while Magnesium Citrate scores 70/100 (Moderate) across 1. Magnesium Glycinate currently has the stronger overall evidence base, but the better choice depends on your goal.
What is the effective dose of Magnesium Glycinate?
Optimal range: 200–400mg elemental magnesium daily. Minimum effective dose: 100mg elemental Mg. Timing: Evening (1–2 hours before bed) for sleep. Split doses for general use..
What is the effective dose of Magnesium Citrate?
Optimal range: 300–400 mg elemental Mg/day. Minimum effective dose: 150 mg elemental Mg/day. Timing: Evening (sleep support) or split doses.
Can you take Magnesium Glycinate and Magnesium Citrate together?
There is little research on combining them, and most people choose one or the other. Check the interaction and safety notes on each ingredient page (Magnesium Glycinate: 2 reported side effects; Magnesium Citrate: 2) and consult a clinician if you take medication.
Why does elemental magnesium matter when comparing forms?
Labels can list the total compound weight rather than the magnesium it actually delivers. Compare forms by elemental magnesium per serving — the dose ranges in the table above are stated as elemental Mg.
Related reading
Educational content only — not medical advice. Supplements can interact with medications; consult a qualified healthcare professional before use. See our methodology & editorial policy.