what your looking for is a product that clinicaly has been proven to restore the peptides that link the collagen cells in the dermal layer of the skin. As we age, they get mixed up and instead of holding hands with the correct collagen cell next to it, they get mixed up and cross-link to other cells no where near them and hold hands with other collagen cells. When this happens, collagen cells are not able to continue to grow, stay firm, and replenish themselves.
So any product you buy you want to ensure that it unlinks these cross-linked handholding peptides, makes them hold hands with the right collagen cells, tells them to keep firm and start making new collagen cells.
In one of my other posts I've stated every product works for someone, and not all products work for everyone. If you're going to try one, try it for at least 8-12 weeks to give it a full benefit of use. If you don't see the result you want, than find a new one to try. Choose on content of product and price range you can afford ad whether you want all natural or a clinical developed product.