Chiropractic, the art and science of spinal medicine, is the largest alternative (natural) health care system in the world. When a normal spine does not release its stress, that is when chiropractic becomes the answer.. Chiropractic,the art and science of spinal medicine,is the largest alternative(natural) health care system in the world. When a normal spine does not release its stress,that is when chiropractic becomes the answer.