The shelf life of general skin care products refers to the "shelf life of products before opening". After opening the bottle, use it according to the shelf life after opening the bottle. If a skin care product has not been used up for a year or two, it is really unfair to accuse the product of being ineffective. In fact, people have already passed the best use period. How can the active ingredient be effective when it is oxidized and deteriorated? Generally, a small can icon with numbers on it can be found on the back of skin care bottles in Europe and America. If you can't find this small mark on the bottle, it may be that the product origin has not promoted the Kaifeng shelf life labeling system, but in any case, it is not a bad thing to use it as soon as possible. In addition, the certification mark, bar code and batch number mark on the bottle can not be ignored. They represent that the products follow strict standards from production to factory, and at the same time, you can know the origin and production date of the products.
Question 2: How to understand the labels of all the ingredients in the ingredient list of skin care products? The higher the content, I don't know what you want to understand. So I will reply here for the time being.
Question 3: What do you think of the ingredient list of cosmetics? 1, a substance with the same structure as skin.
Glycerol, hyaluronic acid, sodium hyaluronate, PCA sodium, collagen, amino acids, cholesterol, glucose, fructose, liver sugar, phospholipids, glucosamine, etc.
If moisturizing products contain these ingredients, it can strengthen the normal function of skin, improve skin quality and eliminate dry skin after continuous use.
2, whitening ingredients
Hydroquinone: A powerful melanin production inhibitor, which can improve or even eliminate chloasma. Different concentrations of hydroquinone can be used to brighten skin tone. However, hydroquinone is an unstable component, which will be oxidized and discolored when exposed to air and sunlight, so be sure to pack the product in an opaque narrow-necked bottle when buying.
Arbutin: Its structure is similar to hydroquinone. Shiseido holds its patent, so other unauthorized companies use plant extracts containing arbutin to avoid patent problems, but the effect is unknown.
Vitamin A acid (all-trans retinoic acid): It can effectively improve pigmentation, especially when used with hydroquinone, especially when used with sunscreen products and hydroquinone.
Fruit acid and salicylic acid
Kojic acid: Because of the instability of kojic acid, many cosmetics are replaced by kojic acid dipalmitate, but no research has found that it has the same effect as kojic acid, and some studies have found that kojic acid may cause cancer.
vitamin C
That's all I know. Please refer to it yourself.
Question 4: How to simply understand the ingredient list of skin care products? First of all, you should make it clear that the higher the content, the higher the front.
Look for preservatives, alcohol, essence and other ingredients that threaten the skin before inspection, and then throw them away.
See if the ingredients that can work, such as sodium hyaluronate with moisturizing effect and soothing plant extracts, are in the front, and the front can be given priority.
That's how I see it myself, and my understanding of ingredients will gradually accumulate.
Question 5: How to understand the ingredient list in skin care products? The composition list is full of chemical terms. With a certain chemical basis, a single ingredient can't reflect the real effect of the whole product, because all the ingredients are coordinated with each other.
Question 6: What do you think of the analysis of cosmetic ingredient list? Nowadays, cosmetics have clearly marked ingredients. This list is very helpful for you to choose cosmetics. Don't blindly hoard goods. Especially for students with allergies, some ingredients that should be paid attention to are clearly written. Now sisters can take out their daily cosmetics for comparison. But I have been allergic to rice since I was a child.
1. Flavor and aroma components to be avoided
□ perfume □ perfume □ smoked cigarette □ perfume.
□ balsam Peru balsam (mainly used for cosmetic products)
Flavors and fragrances have become the main source of skin allergies caused by more and more cosmetics.
2. Artificial preservatives should be avoided.
□ 1, 2- dibromo 2,4- di-n-butane □4- hydroxybenzoic acid.
□ Butyl nipagin □ Cetylpyridine chloride □
□ Chlorhexidine □ Clomizole □ Clinbazole □ dehydroacetic acid
□ chlorobenzene methanol benzyl alcohol □ digluconate digluconate
□ Diazoalkyl Urea □ DMDM hydantoin
□ Ethyl p-hydroxybenzoate □ Cetyl p-hydroxybenzoate □ Formaldehyde
□ Hexamine dithiosulfate □ Imidazolyl urea Imidazolyl urea
□ Methyl chloroisothiazolinone
□ Methyl dibromopentanedinitrile
□ methyl isothiazolinone □ methyl p-hydroxybenzoate
□ Tetradecyl trimethyl ammonium bromide □ Tetradecyl ammonium bromide □PHB- ester
□ phenoxyethanol phenoxyethanol □ potassium sorbate □ potassium sorbate
□ Propyl hydroxybenzoate □ Sodium benzoate
□ sodium dehydroacetate sodium dehydroacetate □ Triclosan
pyrithionc zinc, zpt
The above ingredients have become the main cause of skin allergy caused by more and more cosmetics.
3. Mineral oil components to be avoided
□ petrolatum (vaseline) petrolatum □ paraffin-liquid paraffin
□ Paraffin um- Submerged Paraffin Microcrystalline Wax
□ microcrystalline wax microcrystalline wax □ mineral oil
□ Natural ceresin ceresin □ Pure ceresin
□ c11-kloc-0/2 or c13-1112 or c13-.
Mineral oil is a by-product of petroleum, and the components of these petroleum by-products are cheap cosmetic additives, and good quality cosmetics should not contain these components; These ingredients have the function of sealing the skin, and long-term use will make the skin dry; Because these ingredients will form a plastic-like film on the skin surface, so that the skin can not absorb the nutrients in cosmetics.
A relative said something about vaseline moisturizing just now. My understanding is that cheap domestic products will inevitably use the same cheap raw materials. Of course, some big brands also use the same raw materials, but the price is not as low as raw materials. Examples only refer to those whose ingredients are moisturizing products ...
Question 7: Regarding how to inquire about the ingredients of skin care products, there is a complete ingredient list in official website's product details. If you copy these components, you can check the functions of each component on the cosdna website and so on.
Question 8: Will the country check the ingredient list of skin care products? China . Not really, unless it's a foreign brand. Supervision will be stricter.
Question 9: How to learn to understand the ingredient list of cosmetics and skin care products? 1 Skin care products and health care products are mixed with the naked eye. It doesn't work. 2. It depends on skin care products, skin care products. Seriously study homemade skin care products. If you use skin care products both inside and outside your skin, you should pay attention to internal cultivation. 3. Eat more foods rich in antioxidants such as dark vegetables, fight free radicals in the body to protect the skin, and make the skin fuller and more elastic. Foods rich in vitamin A, such as liver, can help the skin to form new cells, make the skin softer and prevent chapping. 5. Foods rich in vitamin E, such as compactness, have a moisturizing effect on the skin. Foods rich in vitamin e 6 such as wrinkles, pale skin and acne, and foods rich in vitamin B such as coarse grains are helpful to promote skin metabolism and keep skin moist and smooth. 7. Foods rich in zinc, such as seafood, can promote skin health and promote wound healing. Red meat, iron hemoglobin and other iron-rich foods play an important role. Dark circles and eyes all indicate that the body is short of iron. 9. Experience the whitening and rejuvenation of soybean milk yourself or sell pure soybean milk as early as possible. Last night, the bean curd residue was ground three times, and there was almost no nutrition. ) attention, men want to drink. Men should definitely drink intermittently. Stop drinking seven times and recycle seven times. If you take it again, you should cut it every seven times. Eat any food continuously.