Do skin care products have a shelf life? How long is the shelf life of skin care products?

We use skin care products almost every day. A good skin care product can help our skin condition get better and better. In fact, skin care products also have a shelf life. If the shelf life is exceeded, the effect may not be so good. Therefore, we need to understand here whether skin care products have a shelf life? How long is the shelf life of skin care products?

Yes. After opening, products, whether skin care products or cosmetics, will not have such a long shelf life. There is usually an icon on the product that looks like a small can that has been opened, with words such as "6M" or "12M" on it, which means that the best use period is 6 months or 12 months after opening. Even the same product has different expiration dates from different brands. It is not like what some people say that skin care products generally have a shelf life of 1 year after opening, while cosmetics take longer. It is better to check the icon of the product carefully to confirm how long the expiration date is. So once the product is opened, it should be used as soon as possible. Otherwise, if a skin care product has not been used up for one or two years, and then it is blamed for the product's ineffectiveness, it is really a bit unfair to it. In fact, it has long passed the best use period, and the active ingredients should be oxidized or deteriorated. So I rummaged through my things last night, and sure enough, many of them were expired. Cleansing products: Avene's products have a very short shelf life, and the same is true for the face creams that follow.

Many products may have a shelf life of three years, but that is if they are not opened. If they are not used up within one year after opening, they will lose their activity, and their efficacy will be weakened or even ineffective. For example, some anti-oxidation and anti-aging products will only have basic moisturizing effects if they lose their activity. Scrubs, creams, sunscreens, foundations, etc. may have floating oil. The floating oil may be a manifestation of oxidation. Continued use is likely to cause allergies. The surface of water-like products such as lotions, perfumes, and gels is covered with a layer of color, which is also the effect of oxidation. The appearance of brown indicates that the ingredients contained have lost their efficacy. It is recommended to stop using them. Perfumes, gels, creams, sunscreens, lotions, etc. have a different odor than before. It may be that the preservatives have expired and are prone to breeding bacteria. Continuing to use will be worse for the skin. In severe cases, allergies may occur. It is suitable for products that have a different taste from the original taste. If the taste itself is special, it is the ingredients of the product itself, such as the magic water. The authentic taste is very strange.

In fact, skin care products can be mixed in terms of different orders and functions, but you must pay attention to certain mixed use rules to ensure correct and effective skin care. When mixing skin care products, it is best not to use skin care products with similar functions. Two skin care products with the same functions will cause skin nutrition to be excessive and not conducive to skin absorption, but you can choose skin care products with different functions and no irritation to the skin. If your skin is sensitive, it is best not to mix skin care products. Choose anti-allergic or suitable products for sensitive skin. If you have to mix products, then choose low-irritation weak acid skin care products to avoid skin allergies, redness, itching and other problems. What I am talking about here is that some freckle and anti-aging skin care products, although the main ingredients are anti-aging and freckle removal, are also very hydrating and moisturizing. This type is suitable for middle-aged and elderly women. It contains certain hormones or anti-aging ingredients. At this time, it is not suitable for young skin to mix. Young skin is likely to have overnutrition or cause premature aging.

Although long-term use of the same skin care product will not cause skin sensitivity, you will find that the effect is not as significant as before after using it for a long time. This phenomenon is particularly obvious when you use a set of skin care products from the same brand. The lotion that worked well at the beginning is not so effective after using it for a period of time. The reason is very simple. In fact, your skin has adapted to this skin care product and is already in a state of fatigue, so the skin care effect is definitely not as good as before.