Cils Booster Lash Revitalizing Serum restores health to damaged lashes with amino acids to strengthen and condition. This nurturing serum fortifies over-processed eyelashes from root to tip and also ensures fewer are lost during makeup removal. The lightweight formula is especially beneficial for lashes weakened by curlers, makeup, extensions, and false eyelashes. Revitalize lashes twice daily by first applying the serum horizontally as if it were a liquid eyeliner, and then apply it like a mascara, coating the length.