Once opened, matcha is best consumed within 2–4 weeks for optimal flavor and aroma. Always store it in an airtight container, away from light, heat, and moisture to preserve its freshness.

Yes, you’re right to be cautious. High-quality matcha should be vibrant green, not yellow. A yellowish color usually means the leaves are older, overexposed to sunlight, or lower grade, which can affect flavor and nutritional value. Always look for bright green, finely ground matcha for the best experience.

A slight bitterness in matcha is completely normal, especially for high-quality ceremonial or premium matcha. Bitterness comes from natural compounds called catechins, which are also responsible for its antioxidants. As long as your matcha smells fresh and vibrant, it’s safe to drink and still offers the full flavor experience.