High-grade matcha is shaded for ~20–30 days before harvest, which can increase L-theanine levels by up to ~2× (giving it a naturally sweet, umami taste instead of bitterness).
Source: one
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Fact-a-Day
February 20, 2026
February 20, 2026
High-grade matcha is shaded for ~20–30 days before harvest, which can increase L-theanine levels by up to ~2× (giving it a naturally sweet, umami taste instead of bitterness).
Source: one
