Can I wash my hair with soap?

Soap is a must-have tool for many people when taking a bath. Generally, soap has a certain fragrance and also has a disinfecting function, so it is popular with many people. But some people say, can soap be used to wash hair? Let’s talk about it below.

In fact, if you don’t have shampoo at home, you can use these soaps to wash your hair.

Some people have super oily hair, so it is very troublesome to wash their hair every day, especially for some people, it is very troublesome to wash their hair in winter.

When soap molecules meet oil molecules, the hydrophilic groups of the soap dissolve in water, while the lipophilic groups dissolve in oil. Because soap molecules have both hydrophilic and lipophilic properties, they can connect oil and water that were originally immiscible.

The principle of soap cleaning is that the oil in the soap has an affinity with the oil in the dirt on the head. The alkali in the soap can increase the acidity and alkalinity of the dirt on the head, accelerate the decomposition and dilution of the dirt on the head by water, and separate the dirt from the hair shaft and dissolve in the soap solution.

However, the normal human scalp is slightly acidic. Using alkaline soap can cause severe degreasing of the scalp, disrupt the acid-base balance of the scalp, damage the epidermis, and change the hair structure, creating conditions for the growth and reproduction of pathogenic microorganisms.

At the same time, alkaline soap can stimulate the keratinization of scalp epithelial cells, causing dry scalp and increased dandruff, shortening the normal lifespan of hair and accelerating hair loss. In addition, since soap products are oil/water emulsifiers, they easily form insoluble calcium and magnesium compounds in hard water, so a layer of sediment often remains on the hair after shampooing, making the hair lose its luster.