Many people use expired milk to protect their skin, which does have a certain effect, because expired milk will produce lactic acid, which is a kind of fruit acid, which can soften keratin and have a moisturizing effect. The reason why these broken milk can protect skin is mainly lactic acid in expired milk, followed by fat in milk. Therefore, the skin care effect of whole milk is better than skim milk, the difference lies in the amount of fat, but the lactic acid bacteria produced by expired milk will not be affected by the fat content.

Expired milk can also be used to apply to the face. A bottle of expired milk poured in the bathtub may have a poor effect after dilution. Therefore, it is suggested that you can apply it all over your body first, and then soak in the bathtub after 5 to 10 minutes, so the effect is better, and lactic acid bacteria will not cause urinary tract infection, so don't worry.

However, it should be noted that expired milk should not be used if it has caked, because lactic acid will not agglomerate, but milk protein will agglomerate, which has no effect on exfoliation or moisturizing.