OYC International, Inc. is a subsidiary of Oriental Yeast Co., Ltd. (OYC) who is one of the world's largest manufacturers of biochemical products such as enzymes, coenzymes (co-factors), both polyclonal/monoclonal antibodies, recombinant proteins and superior quality liquid stable chemistry reagents. Additionally, dedicated to providing these products as bulk and research quantities to fit each customer individual needs, OYC International has serviced both diagnostic and pharmaceutical companies for over 30 years. Our biochemical products play a key role in the fields of cardiovascular disease (stroke and heart disease), breast cancer and ADME studies throughout contract labs, research institutes and universities. We have the oldest history of manufacturing NAD and NADP in the world. Since 1968 we have been manufacturing biochemical products for the clinical diagnostic industry.