Even those penile extenders and stretchers that claim to work over time would actually just be stretching your flaccid length, and that has absolutely no correlation to how big you get when hard, says Fisch. So don’t waste your money on a product or service that swears it can give you five more inches. “There’s no actual scientific study that they rely on."
Consider taking L-arginine. This is an amino acid that leads to increased blood flow, helping the penis get larger during an erection. A study conducted at Tel Aviv University showed that some men experienced improvements after taking the supplement for 6 weeks. It's available in natural food stores, and the recommended dose is 1 gram (0.035 oz) three times a day.[2]
Definitely yes, if you have a big or small penis is mostly defined by your genes. Sons of men with a large penis often have a large penis. Sons of men with a small penis often have a smaller penis. There are certainly exceptions, but in general genes are very dominant when it comes to erect penis size. From my own experience and research, genetics are the most dominant factor in size, environmental factors or lifestyle only have very limited to no effects.
Even technology is offering some help, let’s call it digital male enhancement, although some people may qualify it as cheating: An android app called “RetouchMe” is offering retouching services for your face and body and explicitly includes an option to virtually get a bigger dick. Sample photos only include dressed men with a big bulge in their pants, a bit silly in my opinion, but judge yourself. Use at your own risk and always remember, making promises you can’t keep on Tinder, Instagram or your favourite dating site may result in disappointed women and that’s not what real enlargement is about.
Eat watermelon. It's not an herb, but it has properties that might help increase the size and duration of erections in a similar way arginine. Watermelon contains an amino acid called citrulline, which gets converted into arginine and leads to the dilation of blood vessels.[4] The fact that watermelon contains citrulline is a relatively new finding, so no studies have been conducted to find out how well it really works or how much watermelon you'd have to eat to see the benefits. However, since watermelon is considered a superfood when it comes to men's health, you can't go wrong by eating plenty of it while it's in season.[5]

Especially strechers are aggressively marketed because manufacturing costs are only about $20 in China and they sell to consumers from $150 up to almost $500. Don’t believe it? Check chinese websites/marketplaces like Alibaba for wholesale prices. A profit margin of up to 2500% is something even many drug lords are envious of, so the companies selling extenders build shiny websites, pay medical personnel for fake testimonials or raving reviews of these useless and dangerous devices.
Are you having problems in the bedroom because of your size? You should not worry about it since there are some penile exercise to increase size, help with erectile dysfunction and increase hardness. Though there are a lot of healthy foods to consume an hour before you get into the act, there are exercises which will help you a great deal in having stronger erections.
For most men experiencing soft or incomplete erections, or just looking to improve the hardness of their erections, the solution is simple: cardiovascular health. We know that probably isn't what you want to hear, but the number one cause of erectile dysfunction is poor cardiovascular health – so much so, in fact, that there seems to be a link between ED and heart disease. What does that mean for you? Simple: lose weight, improve your diet, and improve your cardiovascular performance. If you're a smoker, quit. Lifestyle factors are still the biggest threat to your erections, so get those in check ASAP.
The average flaccid penis is between 3.5 and 5 inches long and 3.5 inches around, while the average erect penis is a little more than 5 inches in length and 4.5 inches in girth. Some men feel inadequate, even though their penis size is perfectly normal. Nearly 70% of men say they’re not happy with their size, and about half wish they could be larger. 
The vacuum pump. This is a cylinder that sucks out air. You stick your penis in and the resulting vacuum draws extra blood into it, making it erect and a little bigger. You then clamp off the penis with a tight ring -- like a tourniquet -- to keep the blood from leaking back into your body. What are the drawbacks? The effect only lasts as long as you have the ring on. Using it for more than 20 to 30 minutes can cause tissue damage. This is sometimes used as a treatment for erectile dysfunction, but has not been proven to actually increase the size of the penis.
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