Matcha comes in several grades that aren’t officially regulated, but the most important distinction is between ceremonial and culinary grade matcha. Ceremonial grade is made from the youngest, most tender tea leaves and is smooth and fine in texture. Use it when you’re planning to drink pure, unadulterated matcha or a top-notch latte. Culinary matcha is a less expensive and made from comparatively older leaves. It is best for baking, cooking, or making blended drinks where the matcha flavor is not imperative. (“Premium” or “select” matcha is somewhere in between the two major grades, and you can find organic versions of matcha in each category.)
The first early harvest of tea, plucked before the first flush, is called shincha. Shincha is made from the youngest new growth leaves, and is plucked from early April to early May. Shincha typically refers to the early harvest of sencha, but can refer to any type of tea plucked early in the season, before the main harvest. Because of the limited quantities in which it is produced, shincha is highly prized and expensive to obtain.
Several varieties of green tea exist, which differ substantially based on the variety of C. sinensis used, growing conditions, horticultural methods, production processing, and time of harvest. Although there has been considerable research on the possible health effects of consuming green tea regularly, there is little evidence that drinking green tea has any effects on health.
Since green tea is less oxidized than its black tea cousin, it is technically fresher and more delicate, so it should be consumed more quickly for maximum flavor. Green tea is best consumed within six months to a year of purchase. You should also take care to store your green tea in a cool, dark place, away from light, oxygen, moisture and fragrant pantry companions like coffee or spices.
In 1994, Burke International registered the name "Rooibos" with the US Patent and Trademark Office, thus establishing a monopoly on the name in the United States at a time when it was virtually unknown there. When the plant later entered more widespread use, Burke demanded that companies either pay fees for use of the name, or cease its use. In 2005, the American Herbal Products Association and a number of import companies succeeded in defeating the trademark through petitions and lawsuits; after losing one of the cases, Burke surrendered the name to the public domain.