Hello, I'm glad to answer this question for you. Collagen abundance is the method that most people will choose, because it has no side effects and is safe, and collagen itself is what the human body needs, which is good for the skin and can also reduce forehead wrinkles. The price is not expensive, generally around 5000-8000, mainly depending on the materials you choose and the hospital. I hope my answer is helpful to you. Thank you.