Can matcha cause jitters?

Rarely. Matcha's L-theanine modulates caffeine's stimulant effect. At very high doses (4g+ matcha), some people experience mild stimulation, but true jitters are uncommon.

Why does matcha not cause anxiety like coffee?

L-theanine in matcha promotes alpha-wave brain activity and modulates the cortisol response to caffeine. Coffee has no L-theanine, so its caffeine triggers a full cortisol and adrenaline spike.

Is matcha safe for people with anxiety?

Generally yes. The L-theanine + lower caffeine dose combination is much gentler on the nervous system. Start with 1g matcha and increase gradually.

How much matcha causes jitters?

Most people can consume 2-4g matcha without jitters. At very high doses or in people with extreme caffeine sensitivity, mild stimulation is possible but true jitters are rare.

Does ceremonial grade matcha have more L-theanine?

Yes. Ceremonial grade is made from shade-grown first-flush leaves, which have higher L-theanine content than culinary grade.

Does Matcha Cause Jitters Like Coffee?

By Steady Matcha Editorial · Founder, Steady Matcha

Published April 15, 2026 · Updated June 1, 2026

Matcha rarely causes jitters, even in people who experience them with coffee. The reason is L-theanine, an amino acid in matcha that modulates caffeine's stimulant effect, promotes calm alertness, and prevents the cortisol spike that causes coffee jitters. Most coffee-sensitive people tolerate matcha well.

Why does matcha not cause jitters when coffee does?

The key difference is L-theanine. Matcha naturally contains 20-40mg of L-theanine per 2g serving - an amino acid that promotes alpha-wave brain activity and modulates the cortisol response to caffeine. A 2008 RCT in Biological Psychology found that caffeine + L-theanine significantly reduced the jittery feeling compared to caffeine alone.

L-theanine + caffeine significantly reduces jitter vs caffeine alone - Biological Psychology RCT, 2008

Matcha contains 20-40mg L-theanine per 2g serving - Journal of Chromatography, 2012

“L-theanine appears to take the edge off caffeine's stimulant effects while preserving its cognitive benefits.”
- Haskell et al., Biological Psychology, 2008

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Frequently Asked Questions

References

L-theanine and caffeine in combination affect human cognition - Biological Psychology (2008)

Part of: Matcha vs Coffee: The Honest Comparison →

Last reviewed: June 1, 2026