Zhejiang Xinxin Bio-tech Co.,Ltd is the most professional and biggest soy isoflavone manufacturers in China, supplying various kinds of soy isoflavones with different specifications. Our main products include 10%~80% soy isoflavone, water-soluble isoflavone, natural genistein and so on. Specifications: 10%,20%,30%,40%,60%,80%