Stamina Review

Caution... You May Be Shocked At What We Found In Our Review of Stamina RX and Zenerx

There are several herbal ED cures on the market that contain ingredients that have been shown to work like Viagra and have long term positive effects on all aspects of a mans sexual health.

The positive benefits that natural herbal supplements provide by increasing erection, ability, size and fullness, as well as treating impotence are many. They include bigger stronger erections, greater sexual performance, increased libido and better overall health.

There are many male enhancement/impotence products on the market but the buyer should beware of formulations that use a potentially hazardous ingredients and manufacturers that do not honor product guarantees. (see review criteria for details)

In this review, we examined 2 of the most popular herbal male enhancement/impotence products. Stamina RX and Zenerx.

Stamina RX: Not Recommended - Primary Reason - FDA consumer warning against use, contains drugs not on the label, and consumer fraud criminal action.

We only included ingredients in our review where we found multiple scientific studies vs. anecdotal evidence that support it's positive effect on the various functions that are important to produce a strong full erection, increase libido and treat impotence issues. This is not to say that other herbs are not effect, only that we have scientific research backing the ones listed.

The anti-stress and adjuvant effects have been evaluated in a number of India studies. Shilajit is found to provide an anti-oxidant defense against several reactive oxygen types. Processed Shilajit provided complete protection to methacrylate against hydroxyl radical induced polymerization and acted as a reversible nitric oxide-captodative agent. These findings are consistent with the therapeutic uses of Shilajit as an Ayurvedic (rejuvenator) against oxidative stress and geriatric complaints of erectile dysfunction.

Horny goat weed has been used for for over 2000 years as an sexual and reproductive tonic. It's acts in multiple ways to increase erection ability, size, and fullness.

Horny goat weed contains a prominent flavonoid called icariin. Icariin is a cGMP-specific PDE5 inhibitor like Viagra, Cialis and Levitra. This was demonstrated in a 1984 University of Peking study.

Also it functions like an adaptogen by increasing levels of epinephrine, norepinephrine, serotonin, and dopamine when they are low - promoting energy, but reduces cortisol levels when they are elevated (an anti-stress effect). High stress conditions, increase cortisol levels causing fatigue and depressing sex drive.

Finally, horny goat weed can restore low levels of both testosterone and thyroid hormone back to normal - improving sex drive.

This South American herb has been used for centuries to treat a weak libido and erectile dysfunction. Two recent French studies supported it's effect treating impotence.

In one study, men treated with muira puama extract 62% reported that it had a dynamic effect on their libido and 51% with erectile dysfunction said that it was beneficial.

In a second study, muira puama extract was given to 100 men with sexual asthenia. 85% of the men reported an increase in libido and 90% reported an increased ability to maintain an erection.

Yes, Good old garlic. In two different 1998 studies one from the National University of Mexico and another from the Institute of Pharmacology, Toxicology and Pharmacy, Munich, Germany show garlic to "activate nitric oxide synthase" or enhance the nervous systems ability to react to nitric oxide.

Also there are multiple studies compiled at the Sloan-Kettering Cancer Institute which demonstrate Garlic’s assistance in both preventing and having curative effects on several medical conditions which are often the cause of ED. These include high blood pressure, heart disease, hypertension and atherosclerosis.

Mucuna Pruriens works as a prolactin inhibitor, a growth hormone stimulant and to increase testosterone.

A U.S. patent was filed in 2002 on the use of mucuna pruriens to stimulate the release of growth hormone in humans. The high levels of l-dopa in the mucuna seed are converted to dopamine which stimulates the release of growth hormone by the pituitary gland. L-dopa and dopamine are effective prolactin inhibitors

Increased levels of prolactin are considered responsible for 70% of erection failure in males. In one study, oral intake of the seeds in 56 human males was able to improve erection, duration of coitus, and post-coital satisfaction after only four weeks of treatment. It also has alsopromots spermatogenic effects in men, improving sperm count and motility.

Tribulus is a natural testosterone enhancer. It is also said to be an excellent circulatory system tonic and can help build muscles and strength.

Clinical studies on the sexual activity-enhancing effect of tribulus have shown the herb to contain protodioscin, a saponin constituent, improving libido in men with impotence due to various causes; libido in women with menopausal symptoms; and sperm motility in infertile and subfertile men.

In another study involving 59 men, ages 22-67, suffering from a range of sexual dysfunctions. An increase of sexual desire and fantasies, as well as sexual self-confidence, were reported in almost all of the patients. The subjective experience of pleasure, joy and satisfaction was reported in 80% of the men; erection improved in over 75% of the men; and the duration of intercourse before ejaculation was prolonged in 25% of the men.

Here is what the Sloan-Kettering Cancer Center had to say in their Ashwagandha Clinical Summary.

"It (Ashwagandha) is also used as a general tonic, to increase energy and improve health and longevity... Ashwagandha has been shown to exhibit antioxidant effects in the brain and to have a tranquilizing effect on the central nervous system in animals... Human study's suggest Ashwagandha may promote growth in children and improve hemoglobin concentration, red blood cell count and sexual performance in adults."

Stamina RX contains the following other ingredients: Dicalcium phosphate, stearic acid, croscarmellose sodium, magnesium stearate, silica and film coat (hypromellose, hydroxypropyl cellulose, polyethylene glycol, titanium dioxide, propylene glycol, and FD&C blue #2 lake).

Herbal Ingredients That Support Overall Male Health and Prevent/Help ED Causing Conditions

There are multiple causes of weak & small erections, impotence and low sex drive which may range from mild (low sex drive, weak erections, lack of energy, slow and weak ejaculation) to severe (total inability to achieve erection and complete lack of sexual desire).

By increasing your health in the above areas you are often able resolve sexual dysfunction issues. This is perhaps where the greatest benefit that natural herbal supplements provide to a mans total sexual performance.

Minimal - Ingredients provide primarily support for an erection, but limited benefits in other important areas.

Moderate - Ingredients provide some additional benefits to the other ED related conditions and overall health.

Significant - Ingredients provide significant preventative/help benefits for other ED causing conditions and overall male health.

We reviewed the ingredients in each of the supplements and cross checked the ingredients against ingredients identified by the FDA as "Supplement Ingredients With Concerns" The one common ingredient on this list is Yohimbe it is considered dangerous and it is an ingredient in a number of male enhancement/impotence products on the market.

Source: FDA "Illnesses and Injuries Associated With the Use of Selected Dietary Supplements"

Yohimbe (Pausinystalia yohimbe)

Yohimbe is a tree bark containing a variety of pharmacologically active chemicals. It is marketed in a number of products for body building and "enchanced male performance." Serious adverse effects, including renal failure, seizures and death, have been reported to FDA with products containing yohimbe and are currently under investigation.

The major identified alkaloid in yohimbe is yohimbine, a chemical that causes vasodilation, thereby lowering blood pressure. Yohimbine is also a prescription drug in the United States. Side effects are well recognized and may include central nervous system stimulation that causes anxiety attacks. At high doses, yohimbine is a monoamine oxidase (MAO) inhibitor. MAO inhibitors can cause serious adverse effects when taken concomitantly with tyramine-containing foods (e.g., liver, cheeses, red wine) or with over-the-counter (OTC) products containing phenylpropanolamine, such as nasal decongestants and diet aids. Individuals taking yohimbe should be warned to rigorously avoid these foods and OTC products because of the increased likelihood of adverse effects.

Yohimbe should also be avoided by individuals with hypotension (low blood pressure), diabetes, and heart, liver or kidney disease. Symptoms of overdosage include weakness and nervous stimulation followed by paralysis, fatigue, stomach disorders, and ultimately death.

Our recommendation is to avoid any product containing Yohimbe. There are many other alternative ingredients that have proven effective and are safe. If you are considering using such a product only use it after consulting your doctor and under their strict supervision.

In our review we found, Stamina RX Contains Yohimbe, all other ingredients are considered safe. However because of it's Yohimbe content we do not recommend it's use.

Zenerx does not contain Yohimbe or any other "Ingredients of Concern" it only uses safe ingredients.

It is important that any manufacturer stand behind their product with a money back guarantee. The fact is each individual is different. Some formulations may work better than others for an individual their condition that may be cause impotence, small or weak erections. That's why a 100% guarantee is a must and the manufacturer must follows through with the guarantee.

By purchasing only from companies that only manufacture their product in the US you can help insure that the ingredients are as labeled. Most of the supplements that have had other substances added (such as sildenafil citrate) have been manufactured outside of the US by unscrupulous companies.

Check to make sure that the supplement is manufactured in the US and not just a US company that imports their product from abroad. The Vinarol recall is a recent example of this occurring.

We checked to see if there are any known product complaints or recalls registered with the FDA for each of the products reviewed. The FDA issued a consumer warning against using Stamina RX because it was found to be laced with prescription drugs.

We check with the Better Business to determine if there are any complaints and the resolution of the complaints.

NVE Pharmaceuticals the manufacturer of Stamina RX has a lengthy history and pattern of consumer fraud complaints with a number of it's products.

Because we do expect companies to shine a positive light on their product, we try to give they the benefit of the doubt on subjective information. Because every individual is different results of any herbal supplement or pharmaceutical will vary. That's why in our review we focus on the proven ingredients. However if a claim is made that is clearly mis-leading based on other factual evidence it is graded as a potentially mis-leading statement.

Stamina RX makes a strong safety claims when medical evidence supports the danger of Yohimbe. Yohimbe is not recommended by doctors who are skilled in alternative and complementary medicine and can be toxic.

"Yohimbe is not recommended because it has a very narrow therapeutic index. There is a relatively small dosing range, below it the herb doesn’t work and above it the herb is toxic. Side effects of normal dosages include dizziness, anxiety, hyperstimulation, and nausea. As little as 40 mg a day can cause a severe drop in blood pressure, abdominal pain, fatigue, hallucinations, and paralysis." Source: Natural Treatments for Erectile Dysfunction, Cathy Wong, N.D.

While all both products include a variety of ingredients that have been shown to be effective to increase erection ability, size, firmness and help impotence, we cannot recommend Stamina RX because they do not honor their guarantee by refunding customers money.

Stamina RX: Not Recommended - FDA consumer warning against use, contains drugs not on the label, and consumer fraud criminal action.

Natural Male Enhancement & Impotence Products Reviewed

Review: Stamina RX & Zenerx
2 Popular Herbal Supplements Compared

FDA Public Health Advisory:
FDA Warns Consumers Against Taking the Following Dietary Supplements-SIGRA, STAMINA Rx and STAMINA Rx for Women, Y-Y, Spontane ES and Uroprin

Natural Male Enhancement & Impotence Products Reviewed

Review: Stamina RX & Zenerx 2 Popular Herbal Supplements Compared

FDA Public Health Advisory: FDA Warns Consumers Against Taking the Following Dietary Supplements-SIGRA, STAMINA Rx and STAMINA Rx for Women, Y-Y, Spontane ES and Uroprin

Review: Stamina RX & Zenerx
2 Popular Herbal Supplements Compared

FDA Public Health Advisory:
FDA Warns Consumers Against Taking the Following Dietary Supplements-SIGRA, STAMINA Rx and STAMINA Rx for Women, Y-Y, Spontane ES and Uroprin