Nourishing and Natural Ingredients EssyNaturals formula is non-irritating, gentle and safe for all skin types. It is a nourishing serum that will help frail lashes and brows to grow stronger and healthier with daily use. Advanced Formula for Longer and Thicker Lashes. EssyNaturals Eyelash Growth Serum & Eyelash Enhancer was specially created to strengthen, magnify, prime and lengthen your natural lashes and brows.