What if I have never used a retinol product before? How often do I use the Time Traveler Serum? 

This is an active product and you may experience redness or tingling. We recommend that you conduct a patch test and build up to twice daily application to maximize results.
Controlled dosage dropper makes application easy. Apply 1 dropper of serum to the face and neck post cleansing/tonic. Twist. Click. Lock.