When will they "work" & how often to use?
Pay attention to your body’s response. There is no perfect solution or blend of oils that works for everyone. Everyone has a different body chemistry, so what works for one person may not work for another. Experiment with different combinations until you find what works for you. You will usually pick up signs (physical or emotional responses) of how you are responding to the oil within 20-30 minutes. From there, you can decide if that would be an ideal oil to continue working with, or if you should consider trying another oil.
Research supports re-applying an essential oil 20-30 minutes when you are not feeling well. The body’s immunity is already under distress and it is necessary to introduce resources in that interval frame to keep it well supported.
On an average day, 3-4 applications in a day are sufficient to support a healthy system. Each application will still serve to increase the body’s electromagnetic frequency and keep it in check at a healthy range.