I am on day 10 of a water fast. Not sure how long I will go, possibly 21 days. I did a 21 day WF last year for BP reasons too. I can say my BP did go down and overall this year it has remained lower than prefasting. I am doing this again due to recent leg injury and surgery. Wow, I can't believe how toxic my body is due to all the meds. Each day is better and I guess I am looking for the day my body tells me it is cleansed and to stop fasting. It kind of makes this easier b/c I don't have a time table, just trying to heal. I do recall feeling tons of energy on day 14 last time.