Lactasoy was founded by Mr. Viriya Chiraphadhanakul in 1950
The factory is the first produced a citrus-flavoured soft drink under brands “Happy” and “Double Happy”.
Later in 1981, Lactasoy soymilk was born. they had converted the production into soymilk products by pioneering the use of U.H.T (Ultra High Temperature) treatment for the soymilk production process. And, Lactasoy has become the first manufacturer in Thailand producing U.H.T soymilk.