I’ve completed 2 3 day water fasts and have lost some weight doing it.
My new goal is to complete a 7 day water fast while biking every day for atleast 2 hours a day, which is what I’m currently doing but I am still eating around ~500 calories a day.
I purchased MCT oil and I’ve heard it will not break the fast, so could I consume a serving of MCT oil before I ride my bike and still be fasting and in ketosis? The reason for the MCT oil is that biking is pretty hard and I wouldn’t like to pass out while riding the bike 
Current weight is 163 but I do lose weight pretty fast while fasting.
My goal is 150, I don’t mind being hungry I just dont want to pass out while riding my bike and actually get to 150, which is where I look the best.
- do you max out your workouts or runs while fasting? I read somewhere that at a certain point your body can’t keep up with the intensity and will start breaking down muscle, but I really haven’t done any research on that and I don’t remember if the source was credible.