When to know I can quit the elemental diet.

Hello, I was curious to those who have had success with the elemental diet. I’m currently on day 15, I don’t really plan on doing the full 21 days as I know most people do 14 days. My hydrogen levels were 40ppm when I originally tested. I’ve still been having normal amount of bowel movements daily (4-6+). I was going to start a transitional diet tomorrow to start working into a low fodmap diet for the next month along with digestive enzymes and iberogast. But I just don’t know it it’s too soon or not, or if there’s any way I should know. TIA