Hi and thank you for your question! Laser is only effective on hair follicles that are actively growing and at any given time, usually not more than 10-20% of hair follicles are in this phase. Hence, for best results we recommend around 6 sessions of laser treatment for most areas. If you had just 1 session of laser, the vast majority of the hair follicles in your beard are most likely unaffected and you should expect near full regrowth after a few months. I hope it helps and good luck!
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