Yes, sometimes in rare cases some side effects can occur, due to varying sensitivities to ingredients, as with any products. However, in our safety tests following proper usage, no side effects have been reported. Xlash customer service closely monitors all reported reactions from customers, receiving approximately 1 complaint per 2,000 users, indicating a very low incidence of issues.
Like all of our products, Xlash/Xbrow formulas comply with EU cosmetic legislation and safety regulations.