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Core Viewpoint - Matcha is a unique type of green tea powder that has gained popularity due to its distinct aroma, rich flavor, and vibrant green color, leading to a variety of matcha-flavored products in the market [1][6]. Group 1: Definition and Characteristics of Matcha - Matcha is defined as a finely ground powder made from shade-grown tea leaves that undergo steaming and drying processes, distinguishing it from regular green tea powder [6]. - The production of matcha involves removing stems and veins from the tea leaves, resulting in a finer texture and higher quality [9]. - Matcha contains a high level of chlorophyll due to its cultivation in shaded environments, contributing to its bright green color [8]. Group 2: Nutritional Components - Matcha is rich in various natural nutrients, including theanine, polyphenols, caffeine, vitamin C, and quercetin, which contribute to its unique flavor and health benefits [8]. Group 3: Quality Indicators for Purchasing Matcha - High-quality matcha should have a bright green color, a strong "covering aroma" similar to seaweed, a fresh taste, and a soft, fine texture [11]. - Consumers should be cautious of products labeled as matcha that may contain additives like sugar or vegetable fat, and should read ingredient lists carefully [12]. Group 4: Storage and Shelf Life - Unopened matcha should be stored in a dry, dark, and cool place, with a shelf life of up to six months if refrigerated [14]. - Once opened, matcha should be kept in an airtight container in the refrigerator and consumed within two months for optimal freshness [15]. Group 5: Caffeine Content and Consumption Recommendations - A typical serving of matcha contains 30-90 mg of caffeine, which is lower than coffee but can still affect caffeine-sensitive individuals [17]. - It is recommended to consume matcha in the morning or afternoon and to avoid intake within six hours before sleep to prevent insomnia [19]. Group 6: Health Benefits and Weight Management - Matcha may enhance fat oxidation during exercise due to its catechin and caffeine content, but relying solely on matcha for weight loss is not advisable [21][22]. Group 7: Preparation and Pairing Suggestions - To reduce bitterness, matcha can be prepared with specific ratios of matcha to water, optimal water temperatures, and natural sweeteners [24][27]. - Pairing matcha with dairy products, fruits, or grains can enhance flavor and nutritional benefits while maintaining health properties [28].