There are no known adverse effects of low-level laser therapy. Because it’s a non-invasive procedure, Emerald Laser requires no preparation and no recovery time — you should be able to resume your day immediately following a session. Some patients have reported a sense of deep relaxation, which may cause drowsiness. Emerald Laser also avoids any long-term side effects by ensuring that fat cells are never destroyed. Fat cells have vital functions, such as supporting metabolism and the body’s immune system. Because of this, cold laser therapy for weight loss chooses to eliminate fat without destroying cells.