A: The high level of beneficial bacteria, combined with the lengthy incubation period, gives our yogurt its signature tartness. During fermentation, bacteria consume lactose in the milk and produce lactic acid—hence, the acidic flavor. The modern yogurt industry has altered traditional yogurt to obtain a more marketable taste and consistency. Mild yogurt, coupled with added sweeteners, stabilizers, and thickeners, has become the norm. Most commercial yogurts are more like a pudding or ice cream-like dessert instead of a staple food product.