He says the amino acid L-theanine could be removed from tea and used as a drug to strengthen the body's defenses.
He says the amino acid L-theanine could be removed from tea and used as a drug to strengthen the body's defenses.
他还说，L－茶氨酸可以从茶叶中提取并制成药剂，从而帮助人体提高免疫力。