Well, it does raise BP, and I am on BP medication and I only use them sparingly and I chart my BP and am fairly fit. They also have 2 mg, so get a Walmart BP tester -$40 or so. They have a wrist one, which I tried and found it a battery eater as it powers a small air pump that is the main power drain = eats a set a week and the NiMh have too low a voltage as well as need recharging after 2-3 days.