Thank you for your question!
You can do more than 4 BFST treatments per day, however there is no real benefit from doing them back to back. The effects of the electromagnetic energy stays in the body for up to 4 hours after treatment. That being said, extra treatments will not cause any harm.
The more you use your BFST, the more benefit you are going to get. If you give yourself 2 treatments per day, that's much better than 1. 3 are better than 2, 4 are better than 3. The effect is cumulative, especially if you spread them out over the day. If you get closer than 2 hours between treatments the additional benefit becomes less.
The owner of the company, Scott, often compares BFST treatments to taking antibiotics for infection or Tylenol for migraines. When you need antibiotics, you don't down the whole bottle at once. You need to take them regularly for a prolonged period to get the best effect. If you take one today and one 3 days later, you're not going to get great results either.
Ideally, if you give yourself a BFST treatment every 4 hours (6 times per day) for 10 days you'll get the most benefit you can possibly get. This isn't very practical though so whatever the customer can fit into their lives the better.
Desiree