I'm trying to figure out what might be causing allergy symptoms I'm having w/ e-cigs. Am just starting 100% VG with decent results in the rash department, but still running into light-headedness, sinus reaction, headachey feeling, etc. Earthpig has suggested that some flavors like cinnamon can cause reactions in some people. Does anyone have a list or know of any other specific flavors or chemicals that might be problematic for some people? Maybe we can get a list going to help people with similar problems track down what they specifically need to avoid.