Introduction: The low-level laser-assisted liposuction technique, also known as the Neira 4L technique, has been described as an adjuvant technique of liposculpture that involves the external application of an electric diode laser (635-nm wavelength at 10 Mw) for 6 minutes per area, allowing the passing of fat from the intracellular space (adipocyte) into the extracellular space (interstitial tissue). Therefore, it is possible that these fatty acids that are free in the extracellular space could pass into the bloodstream and increase plasma triglycerides. Methods: Blood triglyceride levels were accordingly determined in 12 healthy patients before irradiation with the Neira 4L technique, 1 hour after irradiation with the Neira 4L technique, and 30 days after surgery. Results: Study results indicated no significant increases in plasma triglycerides at any time when measurements were made. Discussion: Monitoring indicated that the Neira 4L technique does not increase blood triglycerides above normal values at 1 hour after irradiation or at 30 days after surgery.