Diamond Interest (M) Sdn. Bhd. Is one of the subsidiaries of Dynapharm Group of Companies. Dynapharm (M) Sdn. Bhd. Being the principle company of the group, started its operation as a small scale pharmaceutical manufacturer in 1981. The products manufactured by Dynapharm (M) Sdn. Bhd. Covered a wide range of pharmaceuticals catered for various market segments.

Managing Director Mr. Oi Ho Chooi and his spouse, Madam Ma established Diamond Interest in 1995. The couple has been involving in the pharmaceutical sector for 15 years. The main objective of setting up Diamond Interest is to promote health through sincerity by producing natural and cost-effective product.

The first office is located in Taman Nagasari of Seberang Prai's Industrial Area, Malaysia. Due to the rapidly increasing demands for Diamond Interest products, Diamond Interest has expanded and set up branches in Shah Alam (Selangor) and Kuching (Sarawak) in 1998. Johor branch was set up in 1999 and subsequently Sabah branch in the year 2000. In recent year, Diamond Interest also gained popularity and expands the business overseas such as Singapore, Indonesia, United States, Philippines and India.