Health & caffeine.
Calm, not wired.

A 2g bowl of usucha carries roughly 60–70mg of caffeine — between a strong cup of black tea and a single shot of espresso, and a little under a typical mug of drip coffee at 95mg. Because you drink the whole leaf, matcha delivers more caffeine per gram than steeped green tea, but the serving is small.

Shade-growing raises L-theanine, an amino acid that crosses into the brain and is associated with alpha-wave activity — the relaxed-but-alert state. Paired with caffeine it tends to smooth the curve: less of the sharp spike, less of the crash, more of a level two or three hours. That is the sensation people describe as calm focus, and it is the most consistently reported effect in the research.

Green tea is rich in catechins, chiefly EGCG, which behave as antioxidants. Drinking the powder means consuming considerably more of them than steeping would extract. Studies link regular green tea intake with modest cardiovascular and metabolic benefits at a population level; the honest framing is a small helpful habit, not a cure for anything.

Chlorophyll, beta-carotene, potassium, some vitamin K, and a little fibre — all consequences of eating the leaf rather than infusing it. The calorie count of plain matcha is negligible; a latte's calories come entirely from the milk and any sweetener.

Caffeine is caffeine: if you are pregnant, sensitive, or on medication, count your bowls and speak to a doctor. Catechins and tannins can inhibit iron absorption, so drink matcha between meals if you are managing low iron. And because you are consuming the whole leaf, provenance matters more than with steeped tea — buy from someone who can name the farm.

Coffee gives more caffeine per cup and a faster onset. Matcha gives less caffeine, a slower onset, a longer plateau, and no acidity on an empty stomach. Many people end up doing both: coffee when they need to move, matcha when they need to think.