Why is Retin A supposed to be applied to the skin 30 minutes after the face has been washed?

 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 w...

Tretinoin cream (Retin-A or Renova) is highly recommended by dermatologists for many patients due to its positive effect on wrinkles, sun damage, and acne. It comes in multiple strengths depending on brand. Renova comes in 0.02% and tretinoin cream comes in 0.025%, 0.05%, and 0.1%. To...

Retin-A stimulates collagen production. Micro needling is supposed to do the same, though the evidence is not strong. Using the 2 together should only increase the effectiveness. However, there is no evidence yet that this happens. The best way to use Retin-A is to put it on directly after ...