Preservatives is famous materials associating with developments of economy and technologies. In the trend of organic maintenance and environmental beauty, many skin care brands began to not add preservatives in their products.
What kind of functions do preservative have? The preservatives is not only has the function of
Antiseptic but also contains ingredients of antibacterial antiseptic. Skin care products contain many nutrients, in order not to produce bacteria and cause deterioration of corruption, astaxanthin it often adds preservatives in skin care products to inhibit bacterial growth and production and avoid the phenomenon of cosmetic deterioration and maintain produce freshness and holding effect.
Preservatives in a wide range, divided into chemical preservatives, security and non-toxic organic preservatives. Most commonly seen is the most commonly discussed are the chemical preservatives benzoic acid esters (Parabens), the current British scientists do for breast cancer cells in vivo study, benzoic acid found in the cell residues, suspected to be carcinogenic phenomenon of acid, but This is only a statistical result, is not used to compare normal tissue, so it does not completely determine the benzoic acid esters according to the medical cause cancer. Therefore, dermatologists, the preservative is more likely to cause skin allergy cases only. In fact, a good anti-bacterial acid, irritating low, low price, it is widely used as preservatives in skin care products, but many cosmetics in order to avoid acid esters (Parabens) benzoic acid derivatives to join topic In fact, this still is not good for the skin.
In addition, some chemical species are safe non-toxic preservatives, such as: three pears acid, three pears potassium, there are kinds of preservatives with not toxic. They do not harm the human body; vitamin E is preservative effect of many ingredients as the brand, because the vitamin E itself is anti-oxidants, skin care products to maintain it so easily oxidized, is also often used as a preservative. Many brands to add organic plant extracts as natural preservatives, such as: tea tree oil type, with anti-inflammatory anti-bacterial effect, inhibiting bacterial growth, will not cause harm to humans, but also often see the market's natural preservative.
Perishable products due to general maintenance, it is difficult to achieve completely free of preservatives, so in order to avoid stimulating the skin, the choice of merchandise, recommended allergy products selection without adding preservatives or natural preservatives products, general skin choose chemical of non-toxic, organic and safe use of preservatives in skin care products.
In a preservative-free product, the most important point is that the product itself is sterile. Not only the contents do not add preservatives, all products to be sterile manufacturing process, solvent, biotin bottle packaging must also be disinfected after completion of delivery must be low, or the production into ampoules Kaifeng once used up. There are many brands will be essential ingredients made into a mask, single-use features, you can avoid the deterioration caused by exposure to air the issue, and strict sterilization in the process, we can not add preservatives.
Is every kind of preservative bad? No, the Department of Health currently says that no toxic chemical preservatives can be added into comes tics. For example, 0.1% or 1% Parabens components is allowed. so within the active ingredient in skin care products are recognized, too much or cause harm to humans, but some people still will be allergic to preservatives.
Some skin care products in a variety of preservatives are added, under the provisions of the concentration, chemical preservatives added in different proportions, security and non-toxic organic preservatives preservatives, scattered single preservative toxicity, reduce the harm to human body.
Preservative-free skin care products what would replace corrosion? Usually we use safe preservative like sorbic or potassium sorbic to replace, or use vitamin E and tea tree oil and other natural plant ingredients. They are essential oils with a bactericidal effect.
Properties of the ingredients replacing the anti-corrosion: sorbic, it is a relatively safe ingredient for preservative. Tea Tree Oil: itself has an antibacterial effect and can reduce the bacteria nourish to replace some of the anti-corrosion and sterilization functions. Vitamin E is one kind of natural anti-oxidants which can prevent the cosmetics from oxidation.
  Source: http://www.cosprm.com