SkinMedica HA5® Rejuvenating Hydrator 2 Oz.HA5 Rejuvenating Hydrator 2 Oz. Provides immediate smoothing in the appearance of fine lines and wrinkles, and supports the skin's natural ability to retain moisture resulting in radiant, rejuvenated tone and texture. Appropriate for all skin types. Key Benefits of HA5 HA5 delivers both immediate and long term benefits Instantly smoothes the appearance of fine lines and wrinkles Immediate hydration Improves the appearance of skin texture and roughness