There's been a lot of talk about the male-enhancement product on the market named "Pro Agra". When looking for reliable information on such things, one needs to be careful where one gets his information. Yes, websites can be reliable. So can Wikipedia. But not always. Let's try and objectively take a look at Pro Agra, and attempt to relay scientific "facts" on how Pro Agra works.
To better understand HOW a product such as Pro Agra works - and in this case, Pro Agra itself - we are urged to first talk about what it is setting out to DO. So let's do just that.
Buy Pro Agra sets out to HELP men achieve an erection for sexual intercourse - men who otherwise would not be able to do so. The word "help" is in capital letters for a reason: after researching many products, one thing missing from most of them is that four-letter word. Many of the sales pitching leave it out, implying that a man will get an erection simply by taking their pills. Pro Agra seems to be upfront about their claims in this area, acknowledging that their formula is not going to do everything for him. The sexual excitement part is up to the man himself. His mind must be into it, and he must already - theoretically - be physically CAPABLE of gaining an erection (to use an extreme example: is not going to work if blood flow to the penis is impossible due to accident, surgery, or physical deformity, mental incapacity, etc.).
The active ingredient in Buy Pro Agra is Sildenafil Citrate, which is known to increase blood flow in the body. From there, we take that logic and apply it to body parts: a man's penis is basically just an extremity that has certain uses. As men get older and blood flow just "isn't what it used to be", erectile problems develop. Your extremities are the last places that get the rich nourishment of good blood.
If you believe you are going to experience sexual arousal, that is the time to take Pro Agra. About one hour before sex is the ideal time. It can start working in half an hour and last up to four hours. Of course, diet can play a large part in its effectiveness, so consult your doctor with a meal plan that is right for YOU.