I’m exploring a radiofrequency needling procedure and wanted to understand if the treatment has a side effect of reducing fat in the face? I have a slim face and have lost fat and don’t want to have a treatment which exacerbates this further.

Find a great practitioner and you’ll be fine, seriously. Radiofrequency microneedling treatments are terrific for tightening and smoothing the skin. Yes, the ones with longer needles CAN go deep enough to give a fat-busting effect, but a good practitioner would only do that if it was needed, and after discussing and agreeing this with their patient.