The dry fall and winter season is coming, are you ready to moisturize your skin? Among them, facial mask is one of the essential skin care products. Many people in order to save costs or believe in online recipes, in the home to follow the “unique recipe”, DIY masks. However, is such behavior really desirable? Indeed, life has a lot of material are beauty products, these things are natural and environmentally friendly, do not contain any added ingredients, DIY masks used to hydrate and moisturize, with a good can have a certain beauty effect, economic and convenient materials. For example, the most common cucumber mask can achieve the effect of moisturizing, its extracts have antioxidant and whitening effect, but also to a certain extent on the inflammation of the inhibition of the effect, is a good choice in homemade masks. But we should also note that DIY masks are not absolutely safe. Hygiene can not be guaranteed In the masks we buy, more or less will contain preservatives, the presence of which makes the mask in the preservation and use of the process can prevent the growth of microorganisms. If your skin barrier is intact and you use it correctly, it will not burden your skin. Most homemade masks are made from one or more natural substances, which guarantees the purity of the ingredients, but it is often easy to ignore the word “hygiene”. It is important to realize that any substance that contains water and nutrients is a good environment for bacteria to thrive. Therefore, vegetables and fruits are often at risk of bacterial growth. Whether it is the cleaning of your own hands, the sterilization of fruits and vegetables in the ingredients, or the choice of containers in the process of making masks, all are closely related to the safety and hygiene of homemade masks. Some people may be greedy for the convenience of making too much at a time and store it for further use, but also do not know how much bacterial growth. Unknown ingredients are easy to allergy Although homemade masks are mostly our usual food or drink, but we can not rule out the phenomenon of skin allergies. Some people may like to use expired yogurt to do masks, that one can prevent waste, two can moisturize the face skin. But in fact, in the expired yogurt contains a large number of functionally weakened lactic acid bacteria. Although it has been weakened as a function of digestive food, may still become skin allergens, once allergic, light localized red rash, itching, heavy so that people “face”, resulting in poorer and poorer skin condition. Some fruits and vegetables contain photosensitive substances, these substances are absorbed by the skin and then by the light, but also produce photoallergic reaction, resulting in localized redness, itching, such as fresh aloe vera meat, fresh mango meat. Lemon peel in the lemon essential oil exfoliation, brighten skin color is effective, but its photosensitivity is also stronger, so you can not directly use the peel in the essential oils applied to the skin, the clinic has also seen commonly used tomatoes, cucumbers, etc. caused by solar dermatitis. Can be absorbed to be examined How to choose the right material to ensure that the nutrients can really be absorbed by the skin? Even if the material used is very rich in nutrients, do not expect too much from some homemade masks, such as many fruit masks. Although they contain vitamins and other nutrients, very few of them can be absorbed by the skin. Because, vitamins can be divided into two categories: fat-soluble vitamins and water-soluble vitamins, fat-soluble vitamins including vitamins A, D, E, K, water-soluble vitamins including vitamins such as vitamins C and B. There is a layer of sebaceous membrane on the outside of the skin invisible to the naked eye, and for the topical vitamins, the skin can basically absorb the fat-soluble ones. And for water-soluble vitamins, because it has an instability to light and heat, so in most cases, added to the skin care products in the water-soluble vitamins need to be modified, such as vitamin C using its derivatives, on the one hand, can maintain the stability, on the other hand, is also conducive to the absorption of the skin. There are also rumors of pearl powder whitening. In fact, the main component of the pearl for the calcium carbonate, it is difficult to be directly absorbed by the skin “absorption”; and lemon fruit containing fruit acids and other acids, if the concentration is too high, it will also stimulate the skin, and even destroy the normal skin barrier, for sensitive skin more harm than good. In addition, DIY masks are also masks, and the use of purchased masks, also need to pay attention to the frequency of the use of time. In short, the use of DIY masks depends on their own situation, if you can not grasp, or go to the regular channels to buy regular masks to rest assured, if you always take their own face as a “field of experimentation” is also not desirable. In addition, the purchase of facial masks and other cosmetics should be recognized formal channels, to avoid the purchase of unscrupulous traders. Many unscrupulous vendors in order to make the consumer’s skin in the short term after the use of masks to obtain significant results, will not hesitate to add a large number of hormones or even fluorescents, so that consumers rely on the mask products.