What is Laser Therapy? Unlike surgical lasers that use heat to cut through tissue, "cold" laser uses infared light energy to stimulate cellular healing, which also helps to alleviate pain and inflammation. It has a photochemical effect similar to photosynthesis in plants, utilizing mitochondria to enhance ATP production in cells. This drug-free, side-effect free treatment can be used as an adjunct to your pet's prescribed treatment plan. Class IV Tissue Laser Therapy Uses a