Magnesium Glycinate vs Citrate

Written by Sarah Chen, MS Nutrition Science, RDN

DJP

Reviewed by Dr. James Park, MD, Board Certified Internal Medicine

Published February 20, 2026Updated March 8, 2026

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

TL;DR — Quick Answer

Magnesium glycinate is better for sleep, anxiety, and daily supplementation due to higher bioavailability and fewer GI side effects. Magnesium citrate is better for constipation relief and is typically cheaper. Both are significantly more absorbable than magnesium oxide.

Head-to-Head Comparison

Criteria	Magnesium Glycinate	Citrate	Winner
Bioavailability	High (~80% absorption)	Moderate-High (~65% absorption)	Magnesium Glycinate
GI Tolerability	Excellent — rarely causes digestive issues	Moderate — can cause loose stools	Magnesium Glycinate
Sleep Benefits	Strong — glycine component adds calming effect	Moderate — magnesium effect only	Magnesium Glycinate
Cost	$0.30-0.50/serving	$0.15-0.30/serving	Citrate
Constipation Relief	Minimal laxative effect	Strong — osmotic laxative properties	Citrate

Detailed Analysis

Bioavailability

Glycinate is chelated to the amino acid glycine, which enhances intestinal absorption and reduces competition with other minerals.

GI Tolerability

Citrate has an osmotic effect in the intestines, which is beneficial for constipation but can cause diarrhea in sensitive individuals.

Sleep Benefits

The glycine in magnesium glycinate has independent calming and sleep-promoting properties, providing a dual benefit.

Cost

Citrate is simpler to manufacture and more widely available, making it consistently cheaper.

Constipation Relief

If constipation relief is a goal, citrate is the clear winner due to its osmotic effect.

Our Verdict

For most people, magnesium glycinate is the better choice. Its superior absorption, calming glycine component, and excellent GI tolerability make it ideal for daily supplementation targeting sleep, stress, and general wellness. Choose magnesium citrate if you need constipation relief or are on a tight budget. Both are vastly superior to magnesium oxide.

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Magnesium

Frequently Asked Questions

Can I take magnesium glycinate and citrate together?

Yes, combining magnesium glycinate and citrate is safe and some supplements use this combination. The glycinate provides better absorption for systemic benefits while the citrate adds mild digestive support. Keep total elemental magnesium under 400mg daily from supplements.

References

Uysal N, Kizildag S, Yuce Z (2019). Timeline (Bioavailability) of Magnesium Compounds in Hours. Biological Trace Element Research. DOI PubMed