RetinA can improve the appearance of stretch marks a bit if used for a long time (more than a year), but will not eliminate them. Other agents that might provide a small improvement over time are cosmeceuticals with glycolic acid, growth factors such as Regenica or TNS, and Alastin. But you will get much better results with a series of #microneedling with #PRP. You need to create new connective tissue proteins, including elastic fibers and collagen, and Microneedling with PRP will achieve this more quickly and effectively.
All the best, Dr. Clark