Yes, Botox can absolutely be used for jawline contouring or face slimming.
CAN BOTOX BE USED FOR FACE SLIMMING & JAW CONTOURING?
Masseter Botox: Can Botox Be Used for Face Slimming?
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Jaw reduction using Botox
Non-Surgical Face Slimming - V LINE AESTHETICS
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Botox for masseter muscles in London for face slimming and teeth
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Masseter Botox, Face Slimming
Jaw Reduction & Calf Slimming with Fillers: Botox, Dysport, Xeomin
Masseter Botox: Everything You Need to Know About the Treatment in
Botox to the jawline – what you need to know