Foliactive The personnel operating the IPL machine will put some gel on the skin of the area treated to keep the heat from hurting you and to help the absorption of light better. I like Provillus because it also contains Minoxidil, the main ingredient in Rogaine. You can even carry it in your cosmetic bag anywhere you go. In that case, make sure that zinc is one of the active ingredients since it has a simulating and purifying effect and also kills bacteria and fungi very quickly. https://klereumcol.com/foliactive/