Complex sentence: Many milk products have already been processed in such a way as to remove or modify lactose: cheeses, most yoghurts, cottage cheese, etc. And milk treated with lactase is also safe for the lactose intolerant.
Split into simpler sentences: Many milk products have already been processed in such a way as to remove the lactose. Cheeses, most yoghurts, cottage cheese, etc. And milk treated with lactase is also safe for the lactose intolerant.