Stevia creates an insulin response which is the opposite of what your trying to achieve with fasting also your symptoms sound more like dehydration to me definitely supplement your water intake with electrolytes
Experimented a bit more with this. The electrolytes don’t really work with me because they give me diarrhoea. I tried also low sodium salt, works in terms of making me feel better, but when I had too much also had diarrhoea.
I think part of the issue could be dehydration. However I think even a little bit of salt seemed to make me feel better and lowered my heart rate. Just a very small amount under my tongue. Going to experiment some more the next time I’m fasting.
It’s just amazing to see the dramatic difference in my resting heart rate in a short period of time going from 80bpm to 60bpm after a bit of salt the next time I tried this!