Previously, I had this effect sometimes, but also sometimes got mind-fog or increased heartrate or no effect at all. But now, every 1-2 cups of kefir I drink make me feel great, and after onset (15-45 minutes after drinking it), the effect continues for many hours. I know a lot about the probiotic and anti-inflammatory effects of kefir. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.