Vitry Boost In&Out Beauty Eyelash & Eyebrow Duo Chest is a set that helps strengthen eyelashes and eyebrows. On the one hand, it includes the Boost serum that helps nourish eyelashes and eyebrows, helping to give them extra luminosity. The kit also includes a food supplement in gummy format that helps to improve the health of nails and hair, thanks to its biotin, zinc and vitamins E and C content.