For those of you who have been using Obagi and/or Tretinoin (Retin-A), you may have noticed that you are much more sensitive to the sun now that the summer months are upon us. Tretinoin is made from vitamin A. ...
For those of you who have been using Obagi and/or Tretinoin (Retin-A), you may have noticed that you are much more sensitive to the sun now that the summer months are upon us. Tretinoin is made from vitamin A. ...