The invention can be summarized as follows. There is provided a method for preserving the quality of a perishable product comprising the step of treating the product with one or more near-infrared lights, wherein preferably at least one near-infrared light is a near-infrared laser (or laser diode). The perishable product may be simultaneously treated with a magnetic field. The invention also pertains to an apparatus that may be used to preserve the quality of a perishable product.