Not sure if there's a benefit to a twice-a-day routine, but I'm one of those consumers who really follows product directions closely -- and it does specify on the packaging that it should only be used at night. Maybe it's due to its exfoliation, and that you might need additional protection during the day. As for me, I think it's a miracle product, and I'm seeing great results with once-a-day application. If you really want to be sure, I would contact Perricone directly.
answered 3 months, 2 weeks ago
Most of the time I use it once a day. The jar has lasted three months so far. I don't notice much difference twice a day. So you can use it once. I would suggest once most of the time and then maybe twice a week, use it in the morning too. Be sure and use a moistureizer over it after it absorbs.