OSIM International Ltd  was originally established in Singapore in 1980 by Ron Sim, as an electrical and household appliance company under the name of R Sim Trading. OSIM is a combination of the surname of its founder, Sim, and ‘O’ that stands for the globe.

With a small start-up capital, the company was mainly involved with the marketing of household products such as knives, knife sharpeners and mobile clothes drying rods. In 1989, the company registered the name Health Check and Care, and saw a shift in focus to healthy lifestyle products. The period following this saw tremendous growth for the company, and it developed outlets including Malaysia and Indonesia.

In 1993, the company officially launched the OSIM brand name and its distribution network expanded to 60 point-of-sale outlets in Asia.