We recently asked skin care professionals on DERMASCOPE.com to identify which products retail the best at their spa. Here are the results according to the respondents: Moisturizers 39.1 percentCleansers 17.3 percentSerums 28.2 percentExfoliants 10.3 percentMasks 5.1 percent Share your thoughts on our most recent online survey now!Want to read more? Subscribe to one of our monthly plans to continue reading this article.