Shampoos currently on the market
Various slogans such as suppleness, dandruff, lubrication, etc., but bought back and used, may not have the expected effect. What is the difference between expensive and cheap shampoos?

Hair differentiation
Scalp acid
The pH value of a normal scalp is between 4.5 and 6.5, which is weakly acidic; the pH value of an oily scalp can reach 3 to 4.5, which is acidic; of course, there are also hairs that are easy to dry and frizz. PH value is between 8 ~ 9;
To understand your hair quality, you must choose the corresponding shampoo. For hair that is easy to get oil, use a weak alkaline shampoo, otherwise use a weak acid shampoo.

Oily hair
Of all hair types, oily hair is probably the most annoying, and you ca n’t watch it without washing your hair for two days. Oily hair is mainly due to the strong secretion of sebaceous glands, which slowly penetrates the scalp.
Some of my friends have oily hair, but also chose a nourishing shampoo by mistake. In this way, the pores at the root of the hair will be easily blocked, the hair will become more and more oily, and severe hair loss will also occur.
Recommended use: oil-controlling, silicone-free shampoo; this type of shampoo is more alkaline and can neutralize the scalp's over-acidic environment.

Dry hair
Dry hair is easy to knot, and it is particularly prone to static electricity in winter. After washing, it will frizz without care. This type of hair is due to insufficient secretion of sebaceous glands, resulting in a lack of oil on the scalp. Coupled with frequent hot dyeing and the use of a low-quality hair dryer, the hair scales are damaged.

Friends with dry hair should never choose a weak alkaline shampoo. This will cause an acid-base imbalance in the scalp, which will cause dandruff and dry hair.
Don't think that silicone oil is harmful to us. In fact, people with dry hair are better to choose a mild shampoo containing silicone oil. With the moisture protection of silicone oil, our hair will be smoother and brighter.