From the looks of your photo, I take it you are referring to the folds around your mouth area known as the nasolabial folds. For these, soft tissue fillers work very well. If you are very bothered by them it is reasonable to have a little filler such as Juvederm or Restylane used. I would not use something like Radiesse at this point. Since this is a new procedure for you, it is best to have something placed that is not as long lasting or bulky as Radiesse.
Another good example would be maybe prevelle silk, because it has lidocaine pre-mixed and only lasts 4 months. It is generally more affodable too. I think it is best to get your feet wet something like this since this would be a new experience. Also, from the photo, your folds appear to be more moderate. When we think of frown lines, we typically refer to the lines between your brows and forehead when we frown. For this, Botox is necessary.
I actually do recommend that women in their late 20's to early 30's get Botox as a preventative measure even if they are not yet borrowed by the few wrinkles they may already have. If you are unable to move those muscles to frown, you are unable to deepen you wrinkles and form new ones. Of course, everyone is different and one person may have deeper lines and wrinkles at age 27 than another person has at age 32.
Hope this helps!