Collagen injections can be defined as stimulants, such as collagen, but it led to an increase of collagen in the body. It is a temporary increase of collagen in the body, the injection of collagen is implanted in a given area of the skin is wrinkled and saggy.

The skin where the collagen is administered by injection to plump and firm for a few months. But this form of therapy as a boost collagen has the following disadvantages --
Therapy is the most expensive compared to other alternatives.
Collagen injections are painful.
The injected collagen in the skin to remain for a few months, it is absorbed by the body and the skin is depressed as before. So, collagen injections should be given again and again.

Collagen injections are not working. Take it from me. They are at best a temporary solution. Once you have shot, your skin looks good. But the effect lasts only a few months. For that you need another shot. And this goes on and on. It costs you a lot of money. So if you're looking for a safe and effective method of increasing production of collagen, it is not.

The increase of collagen in creams and lotions are not working.The reason is simple. Your skin is unable to make collagen, elastin, or an external source. These proteins have a very complex structure and can not penetrate the layers of the skin. So no matter how religious you lotions and creams on your face, you will not improve your skin.