# Where do the frequencies come from?

The original frequencies came from a very simple list on an old machine that was discovered back in the early 1990s. Since then, 8000 practitioners over 35 years have experimented with those frequencies in a clinical environment.

It uses frequency pairs and those frequency pairs you can think of as ingredients and the protocols as recipes. So, where the protocols come from was trial and error from all those different doctors, chiropractors, physical therapists, etc. just experimenting with real patients trying to find the right combinations of frequencies that gave the best results.

Those are the protocols that Resona Health uses in all its products.