A new trend on the Internet is not to wash your hair for at least 30 days.

A strange new trend on TikTok is “hair training” - not washing your hair for at least 30 days. Participants call it "hair training," claiming that gradually increasing the time between washes will improve the scalp and hair, making it healthier.

Content with a hashtag #hairtraining already over 164 million views. Mostly, users publish videos where they show their hair, which without washing has become thicker, shinier and less greasy.

@kaitmoritz I went 18 days without washing my hair! My secrets to hair training are brushing and oiling your hair daily, Redken dry shampoo, and crimping your hair so it looks less oily. #GetCrackin#hairtraining#hairwashday#hairtrainingtips#hairtraining101#hairwashingroutine#hairwashing#hairwashroutine#hairtok♬ original sound — Kait

Of course, the trend is not based on any research or scientific data. There is only one argument in favor of such training: excessive washing of hair with various chemicals in shampoo can contribute to drying out of the hair and epidermis. Accordingly, there is a disruption in the nutrition of the hair follicles, and this leads to dryness, fragility and

But excessive washing means more than once a day, not more than once a month. One of the recent research, published in the journal Skin Appendage Disorders, found that washing your hair five to six times a week resulted in the greatest overall satisfaction with your hair and scalp.

However, you need to understand that the optimal frequency of washing your hair may differ depending on the oiliness of your hair. If they are excessively dry, it may be worth reducing the frequency of washing a little. And if your scalp itches frequently or you notice dandruff, you can try washing your hair more often or using a different type of shampoo, focused on the identified problems.