A noninvasive method of slimming a patients body by applying laser energy having a wavelength shorter than 632 nm externally through the skin of the patient. One or more areas of a patients body, preferably the more fatty regions, such as the abdominal, buttock, lower back, thigh, bust or arm regions, is measured. Objective measurements are made of body criteria, including external dimension, percentage body fat, fat mass, or body mass. Sufficient laser energy, preferably in a range of 0.03-0.1 J/cm2, is applied to one or more of those areas to cause a reduction in the measurement in the lasered areas, as well as overall body slimming. The preferred embodiments use laser light at about 532 nm, 440 nm, or 405 nm. Preferably 18 mW or 25 mW laser diodes are used to apply laser energy at 0.03-0.1 J/cm2 for 15 minutes, every other day for 1-4 weeks, depending on the amount of slimming desired.
