Can beiyou be used for a long time?

You can't. According to official website's information, Beiyou Yanzhen belongs to pharmaceutical products, which can't be used for a long time and will produce drug resistance. Zhejiang Beiyou Biotechnology Co., Ltd. is committed to adopting the frontier achievements of skin biology, and with the technical support of the National Research Center of Genetic Medical Engineering and Tenobo Institute of Life Sciences in Japan, selecting active ingredients and reasonably mixing them to effectively improve skin problems.