From the process of the production of glutathione, there are mainly extraction, chemical synthesis, microorganism zymotechnics and chemical enzymatic synthesis. 但由于直接從茶葉中提取高純度茶氨酸的成本比較高昂，茶氨酸的人工合成，特別是微生物發(fā)酵合成方法一直是人們研究的熱點(diǎn)。
The vitamin D artificially synthesized and added to milk is useless to crystalline biology and it is best perhaps therefore to avoid this substance as it is a toxin. 人工合成它并加到牛奶里對水晶生物體是沒(méi)用的，因此或許最好去避免這類(lèi)物質(zhì)，因為它是毒素。
