After 8 days of control data and 8 days of taking Vitamin C...it appears to have lowered my blood pressure about 5 points. 112/75 to 107/70.
Even though I had seen the research, I have to tell you I'm a little surprised. There was a drop on the first night. I did everything I could to keep everything else the same. In fact, I really used it as an excuse to eat kinda crappy. The sleep experiments did continue at the same time, but I can find no connection between any of the sleep results and the blood pressure.
I think I am going to up the dosage to 1000 mg (+90 mg from multivitamin).