Hai-O Enterprise Bhd. operates as an investment holding company, which engages in the manufacture and distribution of pharmaceutical products. It operates through the following segments: Multi-Level Marketing, Wholesale, and Retail. The Multi-Level Marketing segment offers nutritional food and beverage, wellness supplements, skincare, beauty and cosmetics, personal care, and household products. The Wholesale segment trades patent medicines, medicated tonics, healthcare products, herbs, and tea. The Retail segment handles the operation of traditional complementary medicines retail chain stores and provides Chinese physician consultation services. The company was founded by Kai Hee Tan on May 1, 1975 and is headquartered in Klang, Malaysia.