I bought this and have taken about 5 of the capsultes and the good news is that I got no stomach ache. The bad news: it never raised my NO levels a bit as far as I can tell. I have taken two separate readings and I am DELETED with the Berkeley strips both times. Seems to do nothing.
I'm not surprised at all. I figured out that the paper is off by one decimal place. So the actual amount is 25.1mg per capsule. It would take 10-20 capsules before you could probably get any reading at all. Keep in mind there won't be any interaction from chewing so perhaps the NO levels would be lower than with food of the same amount. I'd like to try 20 capsules (since it is just food after all) but I'm sure my stomach would not allow it.
*Cured my intermittent ED which started at ~35 years old by adding in nitrate-containing foods DAILY (arugula, beets, romaine, spinach) and drinking occasional POM juice. Interestingly, I have seen no changes in cholesterol/LDL/HDL or any other typical blood parameters.