Safety may be established through historical or empirical evidence. Formal double blind studies to prove safety and effectiveness are the only recognized research method. Effectiveness needs to be proven because a therapy must work consistently for a particular condition. Safety levels must be established as therapies used are often toxic to the body and can do harm. Studies also help to determine side-effects.
Practitioners acquire education or training in one or more natural health approaches.
Practitioners must qualify as a medical doctor. The doctor is the authority on what is needed to restore health and may specialize in a particular area of the body or in a particular disease. To recognize the role we play in creating health or creating disease. To seek out practitioners and therapies that help. Individuals are expected to follow the doctor's advice.