Oh, I have to use the 90 minutes because of my gastric surgery. Although it failed to produce weight loss (I lost 20 after the surgery due to being so sick from trying to eat, but I bounced right back to the stubborn 250 pounds after I recovered from the surgery).

The other plan Fung uses is on top of the daily 16/8, there are 3 OMAD days. The next level plan is on top of daily 16/8, no meals 3 days per week. Those are the basic templates. Any mix of days. The 3 days can be consecutive, or perhaps M, W, F, or work it around your social schedule, etc.