How Do Penis Pills Work?
To understand the working principle behind penis pills, it's important to know what really happens inside the penis when you have an erection. Your penis is made up of tubular structures and spongy tissue called Corpora Cavernosa and Corpus Spongisum. When you get an erection, this area expands and fills with blood, causing it to lengthen and stiffen. The engorged erectile tissue presses against the veins that carry blood away from the penis. More blood enters than leaves the penis until an equilibrium is reached where an equal volume of blood flows into the dilated arteries and out of the constricted veins: a constant erectile size is achieved. In plain English, erections are all about blood-flow, and penis pills are designed to increase the blood-flow to the penis. While this may result in harder and bigger erections, it won't necessarily enlarge the penis substantially and long-term, especially the size of the flaccid penis. Therefore these supplements should better be called erection pills, although the term penis enlarge pills is more popular. But if you are interested in long-term penis enlargement, your best bet is anyway to combine these pills with penis exercises or the use of a penis extender.

Main Ingredients Of Penis Pills
Some of the so-called penis pills you can buy online are basically just pepped up vitamin pills and will do you little good, others may even contain potentially harmful substances. When buying penis pills on the Internet, better look for a trustworthy source and read the list of ingredients carefully. As pointed out above, the main ingredients of these pills aim to increase the blood-flow to the penis, but the better ones on the market are also designed to improve ejaculatory levels, semen count, and more. A good example are the ingredients of Pro Solution Penis Pills:

• L-arginine
  L-arginine is an amino acid that stimulates growth hormone release and improves the immune system. It is reported to increase ejaculatory volume levels and fertility when taken on a regular basis.
• Dodder seed
  Primary function of this seed is strengthen the uro-genital functions. Traditionally Dodder seed has been used to treat impotence, premature ejaculation, frequent urination and sexual disinterest in males.
• Gingko
  The Ginkgo Biloba leaf extract develops blood circulation and increases the supply of oxygen to the whole body. In men, it increases the arterial inflow to the erectile tissues of the penis.
• Herba Epimedii
  This herb stimulates the supra renal glands for increased hormonal secretions. Herba Epimedii increases sperm count and semen density. It also develops the circulatory system’s blood vessels, while allowing hormone-enriched blood to penetrate sensitive penis tissues.
• Hawthorn
  Hawthorn serves as a tonic for the heart and circulatory system. It has restorative and stimulating properties. It is a renowned remedy for essential hypertension and often used to reduce stress and anxiety.
• Ginseng
  Panax Ginseng is probably the best known medicinal plant in China. It is used for its mental and physical revitalizing effect on the whole body. Ginseng universally fights weakness and gives more energy. It develops the endocrine gland function and has a good effect on the sex glands.
• Catuaba
  Catuaba, a Brazilian herbal medicine is considered a central nervous system tonic with aphrodisiac properties and the bark is used for sexual impotency, agitation, nervousness, neurasthenia, poor memory or forgetfulness, and sexual weakness.
• Muira Pauma
  Muira puama is one of the finest herbs to use for erectile dysfunction. This shrub came from Brazil and has long been used as a effective aphrodisiac and nerve stimulant in South American folk medicine. Its safety and effectiveness in improving libido and sexual function in patients has validated from clinical study.
• Zinc Gluconate
  This supplement is important for the male reproductive system. Zinc is essential for a healthy prostate function. Testosterone, the most essential anabolic our bodies naturally produces, is recognized to be closely interrelated with zinc.