以杜仲(Eucommia ulmoides)叶为原料的杜仲茶作为保健饮料,在美国、中国、韩国与日本被广泛应用。这种杜仲叶含有的成分与其树皮类似,故预期有与树皮相同的药理作用。高桥周七曾报道杜仲叶具有激活胶原合成的作用。但是,杜仲叶的成分因产地、收获时期以及采集后处理方法的不同,其含量也有明显变化。 Eucommia ulmoides leaves Eucommia ulmoides are used as health drinks and are widely used in the United States, China, South Korea and Japan. The Eucommia ulmoides leaf contains components similar to its bark, so it is expected to have the same pharmacological effects as bark. Takahashi has reported on the eucommia leaf that it activates collagen synthesis. However, the composition of Eucommia ulmoides leaves has significant changes in its content due to its origin, harvest time, and post-harvest treatment methods.