u/Beneficial_Pea_3306

Hello! I (23 F) just started IF about a month ago. I just have some really silly questions about IF.

1. Are there any other drinks besides water that can be drunk during fasting?
2. Does the fasting and eating time/window have to be the same time and ratio every day for weight loss to occur or can it fluctuate? For example, this Sunday I did a 12:12 fast. Then on Monday, Tuesday, and Wednesday I did an 18:6 fast where I fasted 9 PM to 3 PM (I do this most of the time). Today, I did a 21:3 where I fasted from 9 PM to 5 PM and ate from 5 PM to 8 PM. Will this negatively impact weight loss if every once in a while despite a majority of 18:6 fasts I increase or decrease the fasting window?
3. Will brushing teeth, flossing, and mouth wash break fast?
4. Will taking headache pills like Advil, tylenol, or motrin break fast?

Thanks!