Expert Eyes provides a complete solution to the lack of density and length in eyelashes and eyebrows. With its fortifying, densifying and growth-stimulating actions, this double serum delivers visible results on eyelash length after 14 days, and on eyebrow density after 28 days of twice-daily use. Eyelashes and eyebrows are weakened by a variety of factors: unsuitable cosmetic rituals, hormonal imbalances, aging, stress, nutritional deficiencies and environmental stressors. These factors can disrupt the hair growth cycle, in particular by shortening the growth phase (anagen) and prolonging the resting phase (telogen), reducing the density and length of eyelashes and eyebrows.