Pretty much right away. Most people do not notice the effect for about 4-5 days though. When I am recommending this product, I usually warn the patient that if they have a social event scheduled within the week, they should be aware of this timeline.
How Much Time Does It Take for Retin-A to Be Fully Absorbed?
Doctor Answers 1
Have a question? Ask a doctor
These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.