sentences:  Since the straining process removes some of the lactose, strained yogurt is lower in sugar than unstrained yogurt.It was reported in 2012 that most of the growth in the $4.1 billion US yogurt industry came from the strained yogurt sub-segment, typically marketed as "Greek yogurt".In the US, there is no legal definition of Greek yogurt, and yogurt thickened with thickening agents may also be sold as "Greek yogurt".