I have been taking this for poor circulation. My hands turn blue/purple very quickly, I have had poor circulation my whole life. I started taking one capsule daily, then increased it to two daily. I have not seen or felt any improvement, not even slightly. As it's currently winter and as I write this review, today is very cold outside, so it's an ideal time of the year to test the effectiveness.
It was worth trying, for me personally it has made no difference.