I drink warm lemon water every morning in empty stomach. lately, I've started to sprinkle little cinnamon powder on it. I have never tested my BS after drinking cinnamon-lemon water. However, couple of days after I've started the cninnamon, on the way to work (no breakfast), I was feeling nauseated and light headed. Instantly, I ate some food from my lunch box and felt better after few mins. I think my BS was too low.