A man named Royal Rife invented a frequency healing machine in the early 1900s. He was sent 16 uncurable patients. Each patient was made well with no side effects and Rife was lauded as a miracle healer until ... he decided to give away his technology at cost and to not partner up with the then head of Sloan Kettering. Within a month or so Rife's lab exploded, he was ridiculed and reviled and the gov't collected his 14 machines and took them away.
Rife disappeared. He reappeared in the late 60s - early 70s with liver disease from years of drinking, was hospitalized, and died in hospital from a mysterious overdose of vallium while in hospital. Go figure.
If you are going to research, fusilier, go to the origins of work.
There will not ever be a way to quantify the value of excellent nutrition. You will find that you are unable to patent the synergistic effect of eating dandelion leaves along with watercress and beets served with a vinegarette of grapes, walnuts and herbs. At the same time, the immediate good effect of eating said salad on a patient is spectacular. There are those who say that 98% of disease is nutritional (lack of nutrition) in origin. Some of them are professor emeritis. Basically, there is no profit unless there is a synthethic something or other which can be patented.
Consider that when you venture to hear an orchestra, a quieted flute can make or break the piece and its effect on you. There is, however, no scientific way to quantify or prove that the sound of timpany will improve a listening experience. How do you scientifically explain that you'd rather hear a live orchestra with a noted conductor than step into an elevator and listen to canned pitch?
As Hamlet spake: "There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy."