This tea does exactly what the description and scientific papers say. It began to help my non-allergic rhinitis (merely a way of saying that the doctor doesn’t have a good test for what is causing the reaction) within a week of receiving it. It probably does work a bit better with ginger, but not enough of one for me to worry about carrying ginger with me everywhere. However I have some ginger extract and will try that, as that was what was used in the study. I drink the tea at around noon and have had no problem falling asleep (due to the caffeine). In fact it has been the opposite — my sleep has been improved. The one thing I don’t care for is the taste. It isn’t bitter, but really doesn’t taste like much of anything — a good reason for adding ginger.