Shanglaite's biotherapy device for skin whitening purpose is designed to target the biological mechanisms underlying skin pigmentation. The primary cause of skin darkening is the overproduction of melanin by melanocytes, the pigment - producing cells in the skin. The biotherapy device employs multiple strategies to address this issue. One approach is through light - based therapy. Specifically, it may use certain wavelengths of light, such as blue or green light, which have been shown to inhibit the activity of tyrosinase, the key enzyme involved in melanin synthesis. By reducing tyrosinase activity, the production of melanin is decreased, leading to a lighter skin tone over time. In addition to light therapy, some devices may incorporate the delivery of bioactive agents. These agents can include ingredients like arbutin, vitamin C, and licorice extract, all of which are known for their skin - whitening properties. The device can use methods such as iontophoresis or ultrasonic penetration to enhance the absorption of these agents into the skin. Iontophoresis uses electrical currents to drive the negatively or positively charged bioactive molecules through the skin, while ultrasonic waves create tiny channels in the skin, allowing for better penetration of the agents. Moreover, the biotherapy device may also promote skin cell turnover. By stimulating the exfoliation of the outermost layer of skin cells, it helps remove the pigment - laden cells more quickly, revealing fresher, lighter - colored skin underneath. This is often achieved through gentle mechanical exfoliation or the use of mild chemical exfoliants in combination with the device's other functions. Overall, Shanglaite's biotherapy device offers a comprehensive and scientific approach to skin whitening, helping users achieve a more even - toned and lighter complexion.