How long can skin care products not be used after opening? How to extend the use time of lotion and emulsion

There are many kinds of skin care products on the market. When buying skin care products, we must pay attention to its shelf life. So do you know how long it takes before the skin care products can be used after opening? Let’s take a look at it together next.

How long can skin care products not be used after opening?

Generally, skin care products should not be used 6-12 months after opening. Skin care products all have a shelf life. If they are not within the shelf life, they cannot be used regardless of whether they have been opened or not. The shelf life will be shortened after opening, so once opened, they must be used up as soon as possible.

How to prolong the use time of lotion

1. Before using lotion each time, you must clean your hands to avoid bacteria from mixing into the lotion, and do not share the same bottle of lotion with others to avoid cross-infection of bacteria, which will accelerate the expiration of the lotion.

2. After using the lotion each time, put the cap on the bottle immediately to prevent dust and bacteria from falling into the lotion, causing the lotion to expire faster and affecting the skin care effect of the lotion.

3. When the lotion is not in use, just store it in a dry and ventilated place. Be careful not to put it in a place with high temperature or too humid place. High temperature will cause the water and oil of skin care products to separate, and a humid environment is more conducive to the growth and reproduction of bacteria.

4. Do not put the lotion in the refrigerator, even in summer. Too low a temperature will destroy the molecular structure of the lotion, and every time you take it out for use, the temperature of the lotion will rise. The repeated changes in temperature will cause the lotion to deteriorate prematurely.

What happens if the lotion has exceeded its use time?

The original shelf life of lotion is three years, but after opening the bottle cap, the ingredients inside are exposed to the air and some chemical reactions will occur, causing the original ingredients of the lotion to change. The longer the lotion is opened, the weaker its skin care effect will be. If you are not careful during normal use and allow more bacteria and dust to fall into the lotion, it will accelerate the expiration of the lotion. Using such lotion is not only not good for the skin, but also irritating.