Results vary depending on your age, the area treated, your skin condition, and the number of vials used in a treatment session. In most instances, multiple sessions, usually 2-3 sessions at 4-6 weekly intervals are required for optimal correction. In general, the rule of thumb is one vial of Biostimulator injection per decade of life. So, if you’re in your 30’s, you will most likely need 3 vials; however, there are exceptions to this rule depending upon the amount of volume loss. Individual responses vary, so the exact number of treatments sessions required cannot be predicted with complete accuracy. After the initial 2-3 treatment sessions, typically, patients will need one maintenance session a year to maintain results.