Natural Health Practitioners are a higher paraprofessional branch of naturopathic medicine, requiring more training than Natural Health Counselors, but less than Naturopaths. They also usually specialize in certain areas of natural health practice. Some may specialize in various massage techniques, and some may specialize in nutrition as well as massage therapy, aromatherapy, or any other branch of naturopathic medicine. Sometimes naturopaths may be called Natural Health Practitioners, but there are slight differences in the level of proficiency. They cannot call themselves physicians, as not all of them are licensed MDs or DOs.