Is It Unhealthy to Use Proactiv Acne Solution If It Is Expired?

If the product was stored in a less than ideal temperature, do not use it. If it contains vitamin C or is sunscreen, the product will not be as effective. If the product is dispensed not through a pump, but by the use of your fingers, bacteria may have collected, in which case toss it out. Skinacea.com explains that ultimately, check to see if the product looks suspicious, read the packaging labels, or contact your dermatologist for more information.