Xxxxxxx Yzzzzzz I think you're absolutely right on your comment above. I read a similar statement on a web site when I was researching the stuff. Some people think that just because something is "natural" it's safe. not always, so I research before I swallow something new. The kudzu has done astounding things for me. I spent almost 12 years having 6 headaches a day, lasting an hour and 15 minutes each. I used the kudzu powder 3 times a day, buy the end of the second day, the pain level had gone from kip 9 to 10 to kip 4 or 5 and oxygen knocked out the headache in 5 minutes. now, I go whole days and nights without a headache. So, the stuff works for me. Powdered, not pills, the pills didn't work. And, I have also learned that if I don't use it faithfully 3 times a day, the headaches are right back, in full force. I'm thinking that, along with keeping blood vessels mildly dilated, it is also removing the excess nitric oxide from my blood stream, and it's got a limited half life. I used verapamil for a few years, and I don't think it really did anything for me. It was more out of desperation that I used it. When the doctor wanted to up my dose, I researched the side effects, found all the heart problems it cause and discontinued it. I'm thinking there is a lot more to what I found about CH people having much higher than normal nitric oxide levels in their bloodstreams...there's a link here, I think. Kudzu is known to reduce this. I think that is where most of it's value to us come in.