Collagen Care

I would like to know the effects of collagen care and the benefits of using natural procedures involving collagen. It is known to aim for skin regeneration by naturally replenishing collagen in the skin. I would like to know what such procedures are available and if you can recommend any. Please also tell me who collagen care is recommended for, and which age and gender are better suited for it. I would like to know how often I should receive treatments, and if there are any side effects from frequent treatments. Although it is a very natural treatment, I am concerned that continuous treatments might put a strain on the skin. What are the characteristics of collagen care? Due to these characteristics, is it naturally possible to continue receiving treatments periodically? If so, please tell me about the other advantages as well.