Nanjing Tongrentang is not a scam, it is true, and the effect varies from person to person. The formula of one-step black washing is mild, and the main components are plant extracts such as Polygonum Multiflori Radix and Angelica sinensis, which can effectively dye hair, with fresh taste, no irritation, uniform coloring and long duration, and can effectively cover the problem of white hair.

Nanjing Tongrentang may have these hazards if it is used for a long time:

1. One-wash black is a kind of hair dye, which contains carcinogen-p-phenylenediamine, which is very bad for your health. But also contains a variety of chemicals, and the detoxification of the body is mainly done through the liver and kidney. Long-term use of black washing will affect the health of liver and kidney.

2, often washed with black, it will damage the scalp, which will seriously lead to hair loss. It may also cause physical allergic problems, such as scalp redness, facial rash and other abnormalities.