Yes, Strialite is safe to use and effective on all skin types. Results may vary. Will it work on old stretch marks? ... Improvement in appearance will be greater with stretch marks that are darker or brighter than with those that are lighter or more faded, however older stretch marks may still see improvement.

Does laser stretch mark removal work on old stretch marks?

So, can lasers really erase stretch marks? The answer is no. Since stretch marks represent a permanent change in the dermis (the deeper layer of skin beneath the surface layer known as the epidermis), there is no amount of resurfacing that can erase them.

How can I permanently remove old stretch marks?