How many days should I wash my hair?

(Baonghean.vn) - Surely the question "how many days do you wash your hair?" will have many different answers. There are people who wash their hair twice a week and still feel their hair is strong and clean; meanwhile, there are people who wash their hair every day but still feel their scalp is oily. How will science answer this question?

Why is your hair greasy?

First, we need to understand the causes of oily hair and scalp. The reason your hair gets oily is similar to the reason your face gets oily, which is when the glands inside the skin secrete an oily substance called sebum. Sebum acts as a moisturizer for the hair, preventing it from drying out.

Hair structure and sebaceous gland function.

The glands that produce sebum (called sebaceous glands) are located just below the hair roots, in the dermis (under the skin). Sebum travels through the hair follicles, running along the hair roots through your scalp.

However, it is important to note that each of us produces a different amount of sebum.

According to dermatologist Paradi Mirmirani of the leading American medical service company, hormones will secrete more sebum during puberty. That is the reason why our hair becomes greasier and acne appears during the puberty years.

How often should I wash my hair?

Because each person's sebum level is different, the question of how many days to wash your hair will not have a specific number for everyone.

Washing your hair properly will help you have healthy hair.

However, after synthesizing research from scientists, here are some tips for you about washing your hair:

+ According to the director of the Boston Medical Center hair clinic - Lynne Goldberg, when you wash your hair too much, it will dry out your scalp and stimulate the sebaceous glands to work more, leading to greasy hair, so you should not wash your hair too much.

+ According to research from Columbia University Medical School, if your scalp and hair are normal (not too oily and not too dry), you should only wash them once or twice a week. If your scalp is too oily, you need to wash them more often.

+ Depending on the length and texture of your hair, the amount of sebum secreted will also be different. Curly hair will secrete sebum more slowly, so if you have curly hair, you should only wash it once a week. Meanwhile, people with long, beautiful hair need to wash it more than twice a week.

+ If you frequently change your hairstyle, dye it or do similar things, your hair will be more vulnerable, so you should wash it less often.

+ The final answer is that you should wash your hair every three days or more. It may sound absurd, but try it for two weeks and you will see that your hair is healthier, not dry and greasy. In addition, for women, the optimal time to wash your hair should be about an hour.

Quan Le

(According to Business Insider)