bonjout Beauty Le Balm solid serum gives skin a healthy glow. The unscented formula is a skin savior, packaged as a refill for the environmentally conscious. Dr. Natacha Bonjout formulated the serum to deliver a dose of concentrated moisture. This solid serum revitalizes the complexion, leaving it feeling soft and supple. It melts into the skin, providing a protective barrier against environmental stressors.