Profile: Wuhan University Hoyo Co., Ltd is based on biological engineering and offers a series of products derived from research & development, production and international trade-based industry. We specialize in amino acids. We produce l-cysteine, l-cysteine HCL anhydrous & monohydrate, s-carboxymethyl-l-cysteine & n-acetyl-cysteine and n-acetyl-tyrosine. We are ISO 9000 certified.