Up until now I usually did 17:7, from 6.30pm to 11.30am, but I found that I snack a lot in the afternoon. Can I just add a short fast between lunch an dinner, so I’m less tempted to snack? That would probably bring up my fasting time to 22 hours, but not really, right? There’s no harm in adding another fast, is there?
You don’t have to continuously eat during your eating window, so yes, you can “fast” between lunch and dinner. I rarely eat anything between lunch and dinner, it just gets to be too much of a habit (the snacking).
I don’t count those as part of my fasting hours, though.