At the same time, most of Yunnan's tea bushes have big leaves (whereas most green teas have small leaves). The big-leaved varieties have fatter buds that make for a stronger tea. Recent studies have revealed that Pu'er has more theine than most teas, allowing it to reduce cholesterol and uric acid in the blood, whereas most teas only repress them.
同時，雲南當地的茶樹是大葉種（一般綠茶、青茶都是葉片較小的小葉種），大葉種芽葉肥壯、茶性較強，內含的物質如茶鹼及多酚類物質也較豐富，可以降低膽固醇、血尿酸（其他茶類只有抑制效果）的研究報導更風行一時。