Xiamen Top Health Biological Engineering Co., Ltd is well known as the largest 5-HTP manufacturer in China, professionally specialized in manufacturing a broad range of traditionally inspired standardized herbal extracts, which are consciously manufactured to meet the highest quality standards for dietary supplements, functional foods and beverages, and the personal care industry.

We have been approved by China Quality Certification Center (CQC) ISO9001:2008 and IQNet standard system ...