For years, Zhu Xuelan, an ethnic Yao woman, born into a family of tea makers in the remote Dayao Mountains of eastern Guangxi ...

Fluoride absorbed by the leaves is transferred to the leaf tips and edges, chelates with metal ions, and the complexes are deposited in the leaves. Fluoride can be transferred from old leaves to new ...

Tea is the world’s most popular drink, except for plain old water. Whether we’re talking matcha, Earl Grey or oolong, it’s all made from the leaves of one species of plant, Camellia sinensis. (Any ...