How long can a lipstick last?

Many women have various kinds of lipsticks at home, and some lipsticks are even "neglected" in the corner and "collect dust" all year round. Little do people know that lipsticks have a certain shelf life, which is generally three years. After this period, the lipstick will deteriorate and cannot be used. In addition, it is best to use up lipstick within one year after opening. Because using lipstick that has been opened for more than one year or longer will cause harm to the human body!

1. How long is the shelf life of lipstick after opening

The shelf life of lipstick is usually 3 years, but some boxed lipsticks have a shorter shelf life because of their large area of ​​contact with air. Generally speaking, the product packaging will indicate the shelf life after opening. If it is 18M, it means the shelf life is 18 months, and 24M means the shelf life is 24 months.

2. How long should I wait to use up the lipstick after opening it?

Today's lipsticks and lip glosses are not only highly pigmented but also very moisturizing. They are gradually surpassing lipsticks to become girls' favorite lip makeup products. However, this type of product has a thick texture and contains fragrance ingredients. In order to avoid the thick liquid from going bad, it is recommended to use it up within one year after starting to use it!

3. The harm of not using up lipstick in time after opening

The oil and wax in lipstick have strong adsorption properties, which can absorb harmful substances such as dust, viruses, bacteria in the air onto the lip mucosa, and enter the body with saliva when eating, drinking, or even talking. Although all lipsticks sold on the market must undergo safety tests in advance, there is still a risk of allergic reactions to users due to different colors and formulas, as well as differences in individual physical constitutions. Lip allergy caused by lipstick has become a very common problem. About 10% of women will experience chapped lips, burning, swelling, itching, epidermal peeling, slight pain, etc. after using lipstick.

4. How to store lipstick after opening

Moisture-proof: A humid environment is a taboo for storing cosmetics, and lipstick is no exception. In order to ensure that the effective ingredients of lipstick are not destroyed, the place where the lipstick is placed should be ventilated every day, and remember to tighten the cap after use.

High temperature protection: Strong ultraviolet rays can easily cause the oils and fragrances in lipstick to oxidize, destroy the pigments, and cause some ingredients to lose their vitality. Some lipsticks will deform or even melt under sunlight. Therefore, keep your lipstick out of direct sunlight.

Anti-pollution: When taking cosmetics, it is easy to contaminate them. Don't put lipstick and other makeup products together, it's best to keep them separately.

Isolate from air: Every time you use lipstick, most girls just put it into their bags after applying it. This will increase the contact between the lipstick and the air and accelerate the oxidation and deterioration of the lipstick. Therefore, it is best to cover the lipstick tightly to isolate it from air.