A look 1, packaging know preservatives, fungicides fungicides, preservatives: is the manufacturing plant of active oxygen. The latest research found that, with the aging of the human body, skin discoloration, wrinkles and a variety of representative of adult diseases, atherosclerosis, cancer, etc. are related to reactive oxygen, a variety of reasons for the generation of reactive oxygen is to harm the human body, skin aging of the real culprits. Identification method: Where the product packaging bottle is a large opening, will be a large area in contact with the air, must contain preservatives, biocides. Therefore, if you want good skin, you must not use cosmetics containing fungicides and preservatives. 2, state to know the activity We know that the traditional cosmetics are mostly creams, and these products need to be emulsified with emulsifiers, so some of the advanced bioactive factors are not likely to be added, which is the traditional cosmetics activity is not high, can only play a role in the surface and can not achieve the anti-aging reasons. Bioactive factors are more active and can only be added to products that are in the state of gel, liquid and lotion. Therefore, if you want to completely improve the skin, do not choose creamy and no bioactive products. 3, color know pigment pigment: just change the color of cosmetics, not help to improve the skin. Regular use will cause hyperpigmentation and form pigmentation over time. Identification methods: some cosmetics are pink, some are green is not the natural color of the product ingredients, a look can be identified. This kind of cosmetics must have added pigment. Therefore, if you want good skin, you must not use colorful cosmetics. Smell 4, smell flavor flavor is only used to increase the flavor and stability of the product, the effect does not help much, the flavor and ultraviolet light and the formation of photosynthesis sensitivity reaction, resulting in skin sensitivity, allergies. Three test 5, water test oil We know that traditional cosmetics can not be separated from the oil, because the mineral oil can moisturize our skin, but the ratio of good and bad mineral oil on the skin is 1:5, it is the only benefit is to be able to temporarily moisturize our skin. And it is harmful to the skin but there are 5 points (oil has adsorption, polythermal, blocking, blocking, dependence), than it is the only 1 point of benefit, it is recommended not to use as well. Identification method: we know that the quality of oil is lighter than water, some heavy oil-containing cosmetics squeezed in a cup of water, you will find that the product will float on top of the water, which indicates that the product must contain oil. So, if you want good skin, you must not use cosmetics containing oil. 6, shaking know alcohol Alcohol’s role is to increase the stability of the product and disinfection, there is no help for the skin, but the alcohol will make the capillaries congested, and over time it will make the pores become larger and cause skin roughness. Identification method: the product with a transparent package, shaking vigorously, to be a few minutes after the discovery of a rich foam, in all likelihood contains alcohol. In addition, you can also use the method of fire, because alcohol can be flammable, some products containing alcohol will burn when they come into contact with fire. So, if you want good skin, don’t use cosmetics containing alcohol. 7, pH test paper to know the acidity and alkalinity Choose clean skin care products must use weak acidic! Why? Add Vicky: jf3380, healthy weight loss – 1 week to lose 10 pounds, January to become beautiful! Because, the skin by the sweat glands secretion of sweat and sebaceous glands secretion of oil will be on the surface of our skin by the natural emulsification of the formation of a natural protective barrier – we call the surface sebaceous membrane, this layer of the protective film is weakly acidic, if you use the product is alkaline, then the surface of the skin sebaceous membrane will be damaged, your skin will be Your skin will become dry and rough. If you use alkaline products, the surface sebaceous membrane of the skin will be damaged, and your skin will become dry and rough. So, if you want good skin, you must use weak acidic products. pH test paper is a quick way to know the acidity. Four burn 8, fire know additives such as whitening additives are mostly lead, mercury, when the lead and mercury content exceeds the standard will cause the depth of human body poisoning, on the human body’s liver and kidney function caused by a great impact. It can be seen that such additives not only can not help the skin, but also bring great harm to the human body. Identification methods: take a small amount of product in a small iron spoon for combustion, found that there is black smoke, dust, emitting a pungent odor, it must contain additives, if there is a fire in the combustion process, it must be contained in the oil, because the ignition point of the oil is very low, very easy to burn. As long as you have used cosmetics, may be more or less will be cosmetics hurt, because the traditional cosmetics contain flavors, colors, preservatives, antiseptics, alcohol and other harmful substances to the body, perhaps you have not detected, but over time, these harmful substances after a long period of time, not only will not play a cosmetic role, but also accelerate the aging of the skin.