Love your hair at any age with NEW YouthLock - JOICO's truly transformative collection that recaptures youthful bounce, shine, and manageability; while locking in strong, lustrous hair. Formulated with collagen, YouthLock is a breath of fresh (h)air for mature, tired tresses! The future of beauty? YouthLock Conditioner. This solution is designed for mature hair that's dry, brittle, and falling short. Delivering body, bounce, shine, and softness, this moisturizing caretaker reinvents hair with a lustrous new outlook.