Quest Lactase Biotix has been specifically formulated to help improve lactose digestion and is ideal for those who have difficulty digesting the lactose found in milk and dairy products. It contains a combination of lactase enzyme and lactobacilli bacteria. It works by creating lactic acid to help break down the lactose. It also delays the release of the active ingredients, reducing the exposure of the sensitive probiotic bacteria and enzymes to the acidic environment in the stomach and releasing these ingredients directly into the intestine. This product is suitable for vegans and vegetarians.