Update to my post last weekend... I tried the extract again on last Sunday and this time it caused dizziness. I am wondering if it didn't dramatically drop my blood pressure since it is said to be a remedy for hypertension. I have low blood pressure to begin with, so I don't think this is a good one for me. I haven't tried it again. However, my husband loves it. He was working on a project last weekend and only got 4 hours of sleep. He had some of the extract mixed in seltzer on Sunday and was energized all day, despite a lack of sleep. He is treating it like a special energizer bunny tonic, only drinking it when needed!