The first brand is collagen produced by Kefang, which is a health care product brand produced in Japan. It has the world's top scientific research and production technology, and the health care products produced are welcomed by many consumers. The second brand is Yan Ruyu, which is a health care product brand produced in my country. The collagen products produced by it can eliminate toxins and waste deposited in the body after taking them. The third brand is collagen produced by GNC, which is a very famous health care product brand in the world and has branches all over the world.