Because human skin is weakly acidic and baking soda powder is weakly alkaline, it is not advisable to use it directly on the skin in large quantities. Otherwise, the skin will be dry, tight and even red and swollen, especially the facial skin, which is exposed all day and is already very fragile, and it is even worse to stimulate it.
At the same time, it is precisely because baking soda powder is weakly alkaline that people's skin is prone to oil because of uneven acid and alkali. At this time, using a small amount of baking soda powder to wash your face can neutralize the acidic substances on the skin surface, and the carbon dioxide released after water dissolution can penetrate through pores and cuticle of skin, promote blood circulation of skin, and make cells metabolize vigorously.
In order to get a good effect of washing face with baking soda powder, it is also necessary to pay attention to the ratio of baking soda powder to water: 1∶5000, that is, 5000 ml of water is used to dissolve 1 g baking soda. After washing your face with this formula, you can dilate capillaries and make your skin shiny, ruddy and elastic. Excessive use will harm the skin!