MOSCOW, 21 Apr. Quality cottage cheese can be chosen, paying attention to the composition and expiration date, follows from the material of the Moscow 24 TV channel. Any cottage cheese should include two ingredients: pasteurized milk and rennet, an enzyme may also be present. Sometimes manufacturers add calcium chloride to cottage cheese, which causes the product to lose quality. Classic cottage cheese cannot contain vegetable fats or proteins, in which case it becomes a curd product. Do not pay attention to additional labels on the packaging. The composition of cottage cheese should not include stabilizers, thickeners, dyes and preservatives. The shelf life of cottage cheese in paper packaging is no more than seven days, vacuum — a month. After opening, the product can be stored in the refrigerator for no more than three days, in the freezer — up to six months.