It is a health system that is beyond the scope of conventional science.

Alternative medicine is a health system beyond the scope of conventional science. They use methods that are not FDA tested or approved on occasion, and some of their methods are not condoned by traditional doctors.

The answer is Alternative health system

Alternative health system still hasn't been backed by legitimate research regarding it's effectivity.

Even though sometimes alternative health system might works, most of the cases it's really dangerous to try to follow this type of health system.