I am having lots of trouble with stomach aches and diarrhea while fasting. I normally do 16:8 or 20:4 and the stomach problems seem to be getting worse the more I fast. My fasting window starts at 7pm at night, so skip breakfast and sometimes lunch. Anybody have any tips? I may need to stop fasting as I am really tired of being sick. Thanks for your help
Some other info in case relevant:
Keto since Oct 2016, down 62 lbs, still ~60 to go.
IF since Dec 2016
No diabetes/pre-diabetes but I suspect insulin resistance due to chronic obesity
Vyvanse (ADHD med) in AM + Zoloft (I worry the meds on an empty stomach could be part of issue)
Run 3x per week while fasted, resistance training 2x week