Does L-Theanine interact with Magnesium Glycinate?

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Take together· moderate evidence

Relaxation without sedation.

L-theanine raises calming alpha brain-wave activity and takes the edge off stress without making you drowsy, while magnesium relaxes muscle and dampens an over-active nervous system, so together they wind you down without knocking you out.

What to do

A good calm pairing for day or evening. A typical dose is 100 to 200 mg of L-theanine with 200 to 400 mg of magnesium glycinate; use the theanine earlier for calm focus and the magnesium at night for sleep.

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L-Theanine
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Magnesium Glycinate
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Common questions

Can I take L-Theanine and Magnesium Glycinate together?
Take together. A good calm pairing for day or evening. A typical dose is 100 to 200 mg of L-theanine with 200 to 400 mg of magnesium glycinate; use the theanine earlier for calm focus and the magnesium at night for sleep.
Why do L-Theanine and Magnesium Glycinate interact?
L-theanine raises calming alpha brain-wave activity and takes the edge off stress without making you drowsy, while magnesium relaxes muscle and dampens an over-active nervous system, so together they wind you down without knocking you out.

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Educational use only, not medical advice. Interaction risk depends on dose, your health, and any medications. Always consult a qualified clinician, especially if you take prescription drugs or are pregnant or nursing.