Grow extra inches and power muscle blast making Grow extra inches boost your levels of testosterone is the most important issue to deal with but if you nitric oxide levels are low you are going to have a new problem with your muscle building you are not pumping adequate amounts of blood oxygen and nutrients out to your muscles here it is a good idea to combine Grow extra inches and power muscle blast to raise your nitric oxide levels well when you use power muscle blast to take care of low nitric oxide levels you will improve your blood flow and expand your veins it will make it possible to pump more nutrients out to your muscles so they can recover and grow faster so using both.