Ok so normally I look at these kinda things as a placebo however the lower back pumps I get are enough to prevent me walking out the gym some days. My coach recommended I try hydramax and see if it helps so I did because nothing to loose I was skeptical but I mixed in with my pre workout and got on with training I finished my whole workout and it wasn't until I got off the treadmil right at the end that I had the dullest ache in my lower back so I was able to leave in comfort and really notice the difference it made and for that I couldn't be happier I'd recommend trying it to anyone with lower back pump issues. Great product I have cherry flavour and mixes well with pre.