It should last at least 60 days, for me it lasts longer. You apply this every night. If you use other Perricone products, you apply after cold plasma - if you use just a moisturizer, you would use prior to a moisturizer. This can be incorporated with other products - just remember the rule of thumb to apply products thinnest to thickest. This is a treatment not a moisturizer, so you definately need moisturizer on top. Hope this helps!
answered 2 years, 7 months ago