1, the role of preservatives
Preservatives mainly contain antibacterial ingredients besides antisepsis, and skin care products contain many nutrients. In order to prevent these nutrients from producing bacteria and lead to the deterioration of skin care products, preservatives are added to skin care products to inhibit the growth and production of bacteria, avoid the deterioration of cosmetics, and maintain freshness and durability.
2. What preservatives are contained in skin care products? what do you think?
There are many kinds of preservatives, including chemical preservatives, safe and nontoxic preservatives and organic preservatives. The most common chemical preservative is paraben, and there is no complete medical basis to determine that benzoate will cause cancer.
Because general skin care products are easy to deteriorate, it is difficult to completely contain preservatives. Therefore, in order to avoid * * * skin, people with allergies are advised to choose products without preservatives or natural preservatives when choosing products. Generally, skin care products containing chemical non-toxic, organic and safe preservatives can be selected.
3, the definition of sterility
The most important thing about preservative-free products is that the products themselves are sterile. All products need to be produced by aseptic process, and the solvent and bottle packaging must also be disinfected. After completion, it must be transported at low temperature or made into ampoules for one-time use.
There are many brands that make the essential ingredients into masks, which can avoid the problem of air contact deterioration due to single use, and strictly sterilize in the process, so there is no need to add preservatives.
4. Ways to avoid deterioration of skin care products
If you want to reduce the deterioration of skin care products, you should be careful in the use process, dip the cream with a small scraper every time, clean it after use, and avoid digging it by hand.
It is best to use skin care products after changing seasons, and then use them after changing seasons. It should be well preserved. If it is not stored properly, the product will easily deteriorate and cause problems to the skin.
5. Is every preservative bad? Or is it a question of proportion?
Not necessarily. Preservatives can be divided into chemical preservatives and non-toxic preservatives. At present, the Department of Health stipulates that 0. 1% or 1% benzoate can be added to skin care products, so skin care products with active ingredients are recognized. Too much will still do harm to the human body, but some people may still be allergic to preservatives.
Some skin care products will add a variety of antiseptic ingredients. At the specified concentration, different proportions of chemical preservatives, safe and nontoxic preservatives and organic preservatives will be added to disperse the toxicity of a single preservative and reduce the harm to human body.
6. Is the content of preservatives related to the shelf life of skin care products? Is it longer and longer?
Preservatives are mainly used to prevent products from rancidity. If you choose a preservative-free product, you must use it as soon as possible. However, it is recommended that sensitive skin try to choose products without preservatives. Assuming good habits, it won't go bad if you don't choose a large quantity of products. Doctors also advise people not to choose products containing parabens as far as possible to reduce the chance of skin allergies.