How to judge the quality of hair?

First, measure the toughness of hair. Cut an inch-long bundle of hair before washing your hair and put it in water for 30 seconds. It can be seen that hair with poor hair quality often sinks into the water quickly.

Second, to see if the hair is smooth, comb the hair from top to bottom with a comb, hold the end of a handful of hair, rub it hard, and then see if the end is cracked or broken.

Third, you can go to the hospital to do hair trace element detection, and comprehensively and accurately analyze the oiliness of hair.