Nasolabial folds are the result of aging. The bone mass in the face is lost as we age, which results in fat cells dropping down. Nasolabial folds need thick fillers to get excellent results. At Cosmetic Skin Doctors Clinic in Melbourne, a nasolabial filler (1 ml) starts at $325. Depending on the quantity of filler required in your case and the number of sessions you'll be undergoing, the cost of treatment for nasolabial folds will vary.