For a better understanding of erectile dysfunction, it is importnant to understand the physiology of the penis and how erection occurs. The human penis is divided into 3 cavities, two corpora cavernosa which are the erectile tissues and one corpus spongium. The secretion of nitric oxide (NO) triggers sexual arousal when blood vessels dilate and blood fills the penis. This lasts until arousal is diminished or after orgasm has been achieved. Penile erection is controlled by the nervous system. On stimulation, the nervous system causes vasodilatation and relaxation of the cavernosal (penis) smooth muscle, which ultimately leads to penile erection. Nitric oxide is released from nerve endings by activating guanylate cyclase and resulting into cGMP which is the secondary messenger that causes smooth muscles relaxation leads to venous engorgement and penile tumescence. The release of Nitric Oxide is very vital to sexual arousal. The herbs and natural vitamins contained in Provigrax herbal Viagra greatly improve the secretion of Nitric Oxide into the blood stream. Causes Of Erectile Dysfunction: The real factors that can lead to erectile dysfunction are diversified. Factors such as stress, anxiety and fear may play a vital role but recent researches have delved more into the real causes. Most experts now believe that the major cause of impotence is physical. Simply stated, anything that interferes with blood flow to the sexual organs interferes with sexual function. Provigrax herbal Viagra causes increased flow of blood to the genitals. This makes it a very potent herbal remedy for erectile dysfunction.

Physical causes of erectile dysfunction:
• Excess use of alcohol, tobacco (nicotine) and drug abuse
• Fatigue, anxiety, and stress that might be a result of overworking
• Damage to the brain or the spinal-cord
• Low testosterone levels i.e. Hypogonadism
• Parkinson's disease
• Exposure of the testicles to radiation
• Heart stroke/s
• Certain types of prostate or bladder surgery
• Hyperglycemia (high blood sugar) or diabetes
• Hypertension (high blood pressure)
• Obesity and high cholesterol level in the blood

Feelings that can lead to erectile dysfunction
• Nervousness about sex. This usually occurs as a result of bad experience or previous episode of impotence.
• Stress caused by work overload or family problems
• Problems associated with poor relationship with sex partner
• Depression
• Consciousness and negative feelings

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Effects Of Testosterone On Sex Drive
It is a normal phenomenon for men to suffer from low sex drive, poor sexual stamina and the absence of sexual interest as he gets older. This is so because most of the testosterone gets bound by sex hormone building globulin. Only 2% of testosterone are left free which are responsible for providing the body with energy and sex drive. The normal level of free testosterone is 800. When the number is less, erectile dysfunction might occur.

Provigrax increases the level of testosterone, therefore it is natural solution to male impotence.
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Epimedium
Epimedium Or Horny Goat Weed has established itself for centuries in Chinese traditional medicine as a natural source of components that restore sexual functions which include improvement of erection, reducing fatigue and depression. In modern times, it is becomming more and more popular. Most effective herbal remedies for erectile dysfunction contain this extraordinary herb. Epimedium commonly known as Horny Goat Weed is one of the most important ingredients of Provigrax Herbal Viagra.

Refered to as one of the most valuable herbal tonic, epimedium supports healthy sexual activity, helps to enhance libido and erectile function. It works by freeing up testosterones which are responsible for sex drive and endurance. It improves kidney functions and reduces the risk of impotence, frequent urination and lower back pain.

Clinical researches prove that epimedium increase sexual activity, enhance sperm production and have a moderate androgen like influence on the testes, prostate gland and genital muscles thus influencing desire and interest for sexual activity.

Researches also show that Epimedium can inhibit an enzyme called acetylcholinesterase (AChE). By inhibiting AChE, Epimedium supports higher levels of the key cholinergic neurotransmitters associated with sexual arousal.

Trials carried out on the usage of Horny Goat Weed prove that it increases the levels of noradrenalin, adrenaline, serotonin and dopamine, thus encouraging release of LH which in turn stimulates testes to produce more testosterone. It as well stimulates the sensory nerves in the genital region. Replenishes overall body energy, endurance and sexual stamina.

MACA (Lepidium meyenii)
Maca is an all-natural herbal wonder from Peru. It has a legendary history for its use to increase sexual ability, pleasure, endurance, mental clarity and most important as a powerful aphrodisiac.

Reports have it that Maca was at the time of the Spanish Conquistadores even used as currency for its many properties as a source of many natural nutrients that the human body needs.

Maca contains 50 naturally occurring phyto-chemicals including vital hormonal precursors and sterols proven to assist the human body. It is also an adaptogen and creates homeostasis in the body, regulates levels of hormones and enzymes. Also supports enhanced libido, improved potency, fertility and increased DHEA & testosterone levels. It helps overcome depression and alleviate stress. This function makes Maca as an herbal remedy against infertility because of its ability to increase sperm volume, count and virility.

Maca is a wonderful source of natural vital health nutrients. The presence of so many amino acids, vitamins, and minerals in their natural states may increase the assimilation, uptake and utilization of them in the body. That’s why Maca is a powerful adaptogen immunostimulant that helps to balance our body's systems, stabilize blood pressure, boost immunity and harmonize the body's overall vitality.

Primary uses of Maca
1. Aid in fertility and as aphrodisiac
2. Energize and revitalize physical and mental strength

Doctor's Comments on Maca
Gary F. Gordon, M.D., former President of the American College for Advance Medicine, now founder and president of the International College of Advanced Longetivity Medicine, located in Chicago, Illinois, who carried series of researches on Maca can be regarded as an authority on its importance on our daily health as well as on its role as a sexual enhancement supplement.

"We all hear rumors about various products like Maca," he says. "But using this Peruvian root myself, I personally experienced a significant improvement in erectile tissue response.”

Dr. Gordon further explains that Maca works by normalizing our steroid hormones like testosterone, progesterone, and estrogen. Therefore it has the facility to forestall the hormonal changes of aging. It acts on men to restore them to a healthy functional status in which they experience a more active libido and at the same time relaxes the penile muscles thereby allowing more blood flow into the penile muscle tissue causing a hard erection.

Due to its many useful properties not only for sexual enhancement, Maca has become extremely popular and can be found in almost every pharmacy either in the natural form (tuberous), in powder or in form of pills.

Doctors around the world prescribe the use of Maca for a number of body revitalizing purposes.

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