Juvederm will not affect surface hydration of the lips. If your lips are dry, I suggest increasing your water intake and moisturizing the lips regularly. Your dermatologist may be able to advise you the best way to get chapped lips under control during your Juvederm consultation.
These HA fillers are hydrophilic but this effect is within the soft tissue matrix of the lips, not on the surface mucosa.BestDr Karamanoukian