Does nitro xpansion and male formula xl really increase the size of your penis?

Not Medical Advice: Makers of NitroXpansion do not make claims of a permanent penis size increase. L-Arginine has been added to the supplement because it has been shown to increase blood flow to the penis during an erection. There are no published clinical studies of NitroXpansion. Even though L-Arginine is an FDA approved nonessential amino acid, there is not enough published research to back up claims that it can safely be used in supplement form to treat erectile dysfunction.

Even though MaleFormulaXL claims to permanently increase penis size, there are no clinical studies to prove it really works. The manufacturer also doesn't list the supplement's ingredients on its website making it impossible to guess what benefits the product may actually have. We were also unable to locate any medical profession or consumer reviews of the product online even though MaleFormulaXL has supposedly been on the market for 5 years and recommended by thousands of doctors.

In erectile dysfunction news, a recent ruling by the Federal Trade Commission (FTC) states that manufacturers of POM Wonderful pomegranate juices and supplements can no longer claim that the products effectively treat erectile dysfunction. A study by the FTC "did not show POM was any more effective than a placebo."

Updated on Wednesday, January 23 2013 at 12:34PM EST