How harmful is hair coloring

1. The most common adverse reaction to the harmful effects of hair coloring is an allergic skin reaction. Some people may not have an allergic reaction at the beginning of hair coloring, but after several times of hair coloring, an allergic reaction may occur, and the longer you use it, the higher the chance of allergy.

2, too much hair coloring can lead to hair loss. The stimulation to the scalp stimulation will cause inflammation of the scalp and hair follicles, over time will lead to hair follicle atrophy, the harm is increasing, the hair from thick to thin, and finally fall out.

3, hair coloring can lead to changes in people's hair quality, the process of hair coloring will affect the water imbalance in the hair, and cause a lot of protein denaturation and reduction. This leads to brittle hair. Dyeing hair is also a major hazard in that it can make the hair fiber break, and then lose the natural beauty of softness, toughness and luster, and the more times you dye your hair, the more serious the damage is.

4, hair dye in the harm is the biggest, its toxic substances will damage the liver and kidney function, mostly in metal hair dye, and some synthetic organic hair dye, such as containing lead acetate, silver nitrate hair dye containing benzene, naphthalene, phenols and so on.