The additional benefit of increasing blood flow to the penis is to cause erections that are harder and longer lasting. Again this is directly related to blood flow, primal grow pro allows the blood to flow to your penis more easily providing for better erections. The primary reason that men start to have trouble getting erections as they get older is that the arteries harden and get clogged and the blood doesn't flow as freely as it used to. A good supplement like primal grow pro can help to solve this problem and increase blood flow.
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