why do people hate preservatives so much?
First, this name makes people feel uncomfortable. If you change the name to antibacterial, It’s easy for everyone to accept it. Maybe everyone is still very welcome to add such ingredients.
The second is that individual media reports on a very small number of problems have caused consumers to lose confidence in these qualified preservatives.
The role of preservatives
The raw materials of cosmetics are mostly oils or nutrients, which are extremely susceptible to microbial infection and spoilage, resulting in a decline in product quality. The production of cosmetics must have a certain preservative method to increase shelf time and use time after opening . Most of the preservatives used in cosmetics on the market and their dosages are in line with national standards.
Conventional preservative categories
1. Formaldehyde and formaldehyde emitters
At the very beginning of the skin care industry, some manufacturers did add formaldehyde to their products to prevent the excessive growth of bacteria. Later, because this practice caused a lot of irritation and dermatitis, chemists began to think of ways to replace the formaldehyde body with something that can release formaldehyde very slowly, so that the bacteria can be inhibited without a large amount of formaldehyde and the human body. contact. Typical preservatives of this type are DMDM hydantoin, imidazolidinyl urea, and bis(hydroxymethyl) imidazolidinyl urea-all in all, the ones with the word “urea” are inseparable.
2. Paraben esters
So far, the association between these preservatives and breast cancer has never been confirmed by large-scale experiments. The cases of contact dermatitis caused by these products are the least. In fact, in terms of short-term toxicity, parabens are the safest known preservatives. There are 4 kinds of parabens, one for each of methyl ethyl propyl butyl, and “butyl paraben”
3. isothiazolinones versus isothiazolinone preservatives
Research on these products shows that this type of preservative is the most preservative of all A type of contact dermatitis that can easily lead to. Such preservatives are mainly methyl isothiazolinone and methyl chloroisothiazolinone. If you are determined to buy products containing this kind of preservatives (some of Estee Lauder’s formulas contain them), then it is recommended that you try a sample first.
4. iodopropynol butyl carbamate
This is the only preservative of which seems to be relatively mild at present, and there are also cases of allergies. The irritation to the mucous membrane is relatively large, and it cannot be used on the lips.