Pentaxyl -
reduces the appearance of stretch marks and scars becuase it has Matrixyl, a peptide that stimulates the fibroblasts to produce more collagen while it strengthens the dermal matrix, restoring skin to a youthful appearance. It is based on wound healing process and tricks the skin to produce its own collagen.
It also has Argireline® which is the brand name for Acetyl Hexapeptide-3. It is considered by experts to be the best needle-free alternative to botox. Argireline® has been shown to reduce wrinkle depth, specially around the forehead and eyes. This was proven in a study published in the International Journal of Cosmetic Science in 2002. In this report, it was demonstrated that a cream containing 10% Acetyl Hexapeptide-3 used by healthy women volunteers reduced wrinkle depth up to 30 percent after 30 days of treatment. Theoretically, this peptide may mimic the effects of botox injections.
Pentaxyl is not cheap but has proven results for diminishing scars and strech marks and you get 120 ml in the tube, it will last for months.