Side Effects of Drinking Matcha Green Tea

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Remember that time you drank green tea on an empty stomach and felt a little… off? Matcha takes that up a notch. Because you’re consuming the whole ground leaf, it’s packed with tannins and catechins—fancy words that can make your stomach feel like it’s doing gymnastics. If you sip a strong matcha latte first thing in the morning, don’t be surprised if you hear a little gurgle.

That gurgle can turn into nausea or even a mild stomachache, especially if you’re sensitive. I learned this the hard way before a morning Zoom call. I thought I was being healthy; my stomach thought I was staging a protest. The trick? Eat something first, even if it’s just a banana.

Wait, Isn’t Matcha Supposed to Calm Me Down?

Here’s the twist: matcha contains L-theanine, an amino acid that promotes calm alertness. That’s the “zen” part everyone raves about. But for some people, especially if you drink a lot, the caffeine can overpower the L-theanine. The result? You feel wired but nervous, like you drank three espressos while trying to meditate.

It’s a bit like dating someone who’s sweet but occasionally leaves you confused. One minute you’re focused, the next you’re checking your email for the fifth time in two minutes. If you’re prone to anxiety, start with a half-teaspoon instead of a full one.