Have you heard of VigRX Plus, Semenax, Testogen, SemEnhance, Max Performer, Male Extra, Viasil, ProSolution Plus, or ExtenZe? These are very well-known products when it comes to male enhancement, some have been on the market for over 10 years and continue selling and winning fans all over the world.
Is there a supplement that can beat all this weight competition? Well, I want to introduce you to the newest male enhancement supplement on the market! Performer 8, a product that wants to dethrone the competition and become a reference in the world of male sexual supplementation.
I carried out extensive research on its ingredients, to try to find out if the Performer 8 formula is effective and will live up to all the promises that we found on its official website. In this review, I focused especially on the ingredients of its formula, after all, it is through them that a supplement may or may not work.
Performer 8 Review
If you want to last longer in bed, you need to know more about one of the best male enhancement pills of 2024, which is none other than the Performer 8 enhancement pills. Read on and find out more.
What You Should Know About Performer 8
Performer 8 enhancement pills can surely help you give the best sexual performance ever. Packed with powerful and proven ingredients, this male enhancement pill has the most powerful and effective male enhancement formula available on the market today. Male enhancement pills can super-charge any man’s sex life, increase your sex drive, and let you enjoy all-night staying power.
One of the best things about Performer 8 is the fact that it is safe and specially formulated to help you gain extra confidence and stamina. With this enhancement pill, you can please your partner with bigger and harder erections.
Another fact you should know about Performer 8 is its ability to fight against erectile dysfunction. For the information of everyone, erectile dysfunction is a particular condition in which a person cannot reach or sustain an erection. Unfortunately, this condition is a primary cause of low self-esteem among men. But with the help of Performer 8, you can surely fight this condition.
Performer 8 as a Male Enhancement Supplement
Performer 8 (https://performer8.com) is a male enhancement supplement recently launched. The 8 in its name refers to the number of benefits that the product can offer its consumers. In addition, Performer 8 has 9 ingredients that, according to the manufacturer, are all clinically proven.
Characteristic | Verified information |
---|---|
Name | Performer 8 |
Category | Sexual Health |
Classification | Male Enhancement |
Guarantee | Lifetime Guarantee |
Available in 3 helpful amounts: | 1 Bottle (30-Day Supply), 3 Bottles (90-Day Supply) & 6 Bottles (180-Day Supply) |
1 x Pack Price | USD 64.99 |
Customer Ratings | 4.9/5 on online stores |
Website | https://performer8.com |
Brand Reputation | Well-established (2014), trusted |
The Benefits of Performer 8
More and more men are enjoying the benefits of Performer 8. This particular male enhancement product helps you achieve fuller, harder, and stronger erections. With this, you can enjoy a more pleasurable and longer lovemaking with your partner. With Performer 8, you won’t have to worry about getting soft or finishing too early.
Another benefit you can get from this male enhancement product is an increased sex drive. By taking this product, you will surely achieve an increased sex drive and improved sexual performance.
Performer 8 has been proven to increase the flow of blood which means longer-lasting orgasms and more intense lovemaking.
Moreover, this product also supports sexual health. In other words, you obtain improved sexual function, libido, and general sexual satisfaction.
And the best thing about this product is the fact that it can solve problems related to erectile dysfunction. We all know that this particular condition is not a laughing matter. It can lead to lower self-esteem and even relationship problems. But with Performer 8, every man must not worry anymore.
Performer 8 is a proven all natural enhancement product that is validated by various research and clinical studies. This product contains nitric oxide which has been proven to promote hard and long-lasting erections.
How does Performer 8 work?
The 9 ingredients present in its formula can help men over 35 years of age to increase testosterone and sexual desire, in addition to improving blood flow in the penis, increasing sexual desire, and resistance in bed. This supplement can also help to reduce oxidative stress and protect blood vessels by increasing the levels of nitrous oxide in the blood.
What does Performer 8 promise its consumers?
- Massive sexual energy, drive, and stamina;
- Firmer, stronger erections that last;
- Increase semen volume and motility;
- Climax on your watch.
Who are the main competitors of Performer 8?
- VigRX Plus
- Semenax
- Testogen
- SemEnhance
- Max Performer
- Male Extra
- Viasil
- ProSolution Plus
- ExtenZe
Before we continue the comparison with its main competitors, we need to know the Performer 8 formula and its ingredients.
Performer 8 Ingredients and Nutritional Information
Performer 8 has 9 ingredients in its formula, and from now on we will get to know each one of them.
Ingredient | Amount |
---|---|
Maca Root Extract | 30 mg |
Panax Ginseng | 6000 mg |
Horny Goat Weed | 1,000 mg |
Pine Bark Extract | 300 mg |
Glucuronolactone | 600 mg |
Grape Seed Extract | 30 mg |
Muira Puama Extract | 3,000 mg |
KSM-66 Ashwagandha® | 500 mg |
Ferrous Bisglycinate | 12 mg |
What is the main function of each ingredient?
- Muira Puama Extract: Improve erections.
- KSM-66 Ashwagandha: Increase testosterone and sex drive.
- Ferrous Bisglycinate: Supports blood flow.
- Maca Root Extract: Improve sexual desire and stamina.
- Panax Ginseng: Improve erectile function and stiffness.
- Barrenwort: Improve blood flow and erections.
- Pine Bark Extract: Improve sexual function and satisfaction.
- Glucuronolactone: Reduce oxidative stress and protect blood vessels.
- Grape Seed Extract: Increase the levels of nitric oxide in the blood.
I have carried out extensive research to find out what each ingredient is capable of, I will also list the main benefits of each ingredient, trials, and clinical studies of each one. You can access the list of sources and references at the end of the article.
1) Muira Puama Extract
Muira Puama, also known as potency wood, is an herb that comes from a small shrub in the tropical forests of Brazil. It has been associated with increased erectile function and orgasm in elderly men who suffer the effects of fatigue or age-related complaints.
Strong aphrodisiac for men
Muira Puama or “potency wood” is best known for its aphrodisiac or “sexual desire boosting” effects in men. How it is caused is not known yet but the possible mode of action behind this is a significant increase in male sex hormone (testosterone) levels by Muira Puama.
Treatment of male impotency
The beneficial use of Muira Puama in the successful treatment of erectile dysfunction has been now proven and backed by various studies and trials. In a French study, which was done on men with erectile dysfunction or male impotency problems and reduced libido, Muira Puama containing supplements greatly increased libido / sexual desire in up to two-thirds of the subjects. About 50% of the men also reported remarkable improvement in their ability to gain and maintain strong penile erections.
Studies by Dr. Jacques Waynberg, from the Institute of Sexology in France, presented at The First International Congress on Ethnopharmacology in Strasbourg, France, in 1990, with 262 patients demonstrated that the herb is one of the most effective in the treatment of erectile dysfunction since 62% of patients with erectile problems showed improved performance. Chemists have identified the presence of beta-sitosterol, which they believe is related to the herb’s aphrodisiac effect.
2) KSM-66 Ashwagandha
Ashwagandha, also called Indian ginseng, is a medicinal plant, based on Indian principles of natural healing. Being widely used to improve mental and physical performance.
This plant has been used for more than 3,000 years, known to be a sleep inducer. In addition, it is considered to be a herbal medicine, as it proves to be excellent for controlling stress and anxiety, promoting an improvement in hormonal regulation.
It is worth saying that ashwagandha stands out in several other functions, such as anti-inflammatory, immunostimulant, toning, and aphrodisiac. Thus, this herb has been the basis for protecting the body against a variety of problems.
It is worth mentioning that its active principle, which at the same time is soothing, is also invigorating, that is, the same element shows itself as an adaptogen, capable of several actions.
Ashwagandha is indicated for people looking for quality of life and healthy aging. Restores energy, is revitalizing, anti-stress, and adaptogen, promotes the maintenance of the health of the immune system; improves the sexual performance of men and women; restores attention, and improves the quality of sleep naturally and healthily. Withania somnifera, commonly known as Ashwagandha or Indian Ginseng, has been used for centuries by Ayurvedic medicine to increase longevity and vitality.
What is it for
The use of this medicinal plant can have several health benefits such as:
- Increase sexual desire;
- Reduce physical tiredness;
- Increase muscle strength;
- Improve energy levels;
- Stimulate the immune system;
- Control blood sugar levels;
- Reduce high cholesterol;
- Fight insomnia.
In addition, this plant can also be used in some cases to complete cancer treatment, as it makes cancer cells more sensitive to radiation or chemotherapy.
Research shows its diverse uses, considering it a polypharmacological asset, where its therapeutic constituents promote several benefits to the organism: antioxidant, anti-tumor, anti-inflammatory, aphrodisiac, stimulating, immunomodulatory, anti-stress, and adaptogenic activity.
Due to its adaptogenic properties, Ashwagandha is effective in the adjunctive treatment of symptoms of stress, depression, and anxiety in healthy individuals. Due to its therapeutic properties, it has an excellent Neuroprotective effect and can be a promising alternative for the treatment of a variety of neurodegenerative diseases such as Alzheimer’s and Parkinson’s.
3) Ferrous Bisglycinate
Chelated bis-glycinate iron is an iron compound that has greater tolerability and causes less incidence of adverse effects compared to iron salts, such as ferrous sulfate. It consists of two molecules of amino acid glycine linked to the ferrous ion (Fe2 +) through covalent bonds.
Several studies have demonstrated greater effectiveness and absorption of iron bis-glycinate chelate compared to ferrous sulfate, as described below.
It is an essential element in the constitution of hemoglobin and myoglobin, an oxygen transporter, associated with copper and cobalt, it helps in the prevention of anemia.
- Prevents anemia due to the absence of iron, and increases muscle mass, with weight gain improving health.
- Improves the conversion rate of food.
- It increases fertility and favors the increase of offspring.
Ferrous chelate bis-glycinate is an amino acid-mineral complex, composed of an iron atom linked to two glycine molecules, through coordinated covalent and ionic bonds. This structure provides superior bioavailability, without causing the side effects characteristic of iron salts. The chelated amino acids, in general, do not undergo ionization in the gastrointestinal tube due to their stability in the acidic pH of the stomach and alkaline of the small intestine.
Ferrous chelate Bisglycinate is absorbed as such, occupying pre-existing enzyme absorption systems (γ-glutamyl transpeptidase). The enzymatic action of ferrous chelate Bisglycinate allows this compound to reach the interior of the cell and then be transferred to the blood and distributed to target organs such as bone marrow, spleen, liver, and red blood cells. In the liver, it is stored as ferritin. The absorption of ferrous chelate Bisglycinate is about three times higher than that of ferrous sulfate.
4) Maca Root Extract
The study by Universidad Peruana Cayetano Heredia (Peru) also proved that the Peruvian stretcher influences male fertility. Men aged between 24 and 44 years were evaluated for four months and received doses of the food. The researchers concluded that there was an increase in the amount of semen and in the mobility of sperm, which made men more fertile.
Scholars at the Czech University of Life Sciences Prague (Czech Republic) have also proven this benefit of the tuber. In this research, 20 volunteers aged between 20 and 40 years participated who received the ground Peruvian maca and increased their fertility.
Food also has benefits for people with erectile dysfunction (ED). A study released in the Journal of Andrology looked at men with the problem. Those who consumed the Peruvian maca for four months improved sexual performance compared to those who did not have access to the tuber.
5) Panax Ginseng
Ginseng has been used for thousands of years by oriental medicine for various purposes. The root has properties capable of revitalizing energy, assisting the immune system, and improving memory capacity. However, some research is already beginning to indicate that the plant also has an aphrodisiac action and favors sexual appetite.
According to surveys by the Brazilian Society of Urology, about half of men over 40 have complaints related to erections. Some North American studies show a prevalence of at least mild erectile dysfunction of around 40% at 40 and almost 70% at 70.
The good news is that scientists at the Yonsei University School of Medicine in South Korea have proven the effectiveness of ginseng in decreasing erectile dysfunction. The study was published in one of the most important international newspapers, the Daily Mail, in 2013.
Conducted with more than 100 men, research has shown that a natural ginseng medication can fight erectile dysfunction in a few weeks.
Although treatments with drugs like Viagra, Cialis, and Levitra have existed for more than 17 years, 30% of men complain of not having any results with these drugs. For that reason, ginseng has become an alternative.
For the study, the researchers recruited 119 men with moderate erectile dysfunction. The group was divided into two: half took four tablets of ginseng extract and the other took a placebo for eight weeks. After the period, the scientists measured the improvement using a recognized scale called the International Index of Erectile Dysfunction.
They then concluded that those who took the ginseng extract had a small but significant improvement in the body’s sexual function compared to those taking the placebo. “It can be used as an alternative to the drug to improve men’s sexual lives,” the researchers said in the report.
6) Barrenwort (i.e., Horny Goat Weed)
The herb “Horny goat weed” (botanically known as Epimedium Sagittatum) has been used for thousands of years as a potent aphrodisiac and sexual tonic in both sexes in general and in men in particular. However, to date, no scientific data has revealed if the benefits obtained by the regular “oral consumption” of horny goat weed are permanent or even long-lasting.
It should be noted that while significantly enhancing and improving male sexual desire in men, Epimedium Sagittatum also helps men suffering from impotency (erectile dysfunction) by blocking the enzyme AChE. This leads to an increase in the levels of hormones that are related to sexual arousal and orgasm in men.
It is said that Epimedium Sagittatum does so by stimulating the hormonal release of some specific androgen. Androgens are hormones e.g. androsterone and testosterone, which cause the development and growth of male sex characteristics. The most potent ingredient found in Epimedium Sagittatum is icariin, which increases concentrations of nitric oxide in the blood. This leads to the relaxation of the smooth muscle of several organs and glands including the penis. This allows for a broader, dilated passage of blood in the penis and hence, causes stronger, longer, and thicker erections.
In addition, Epimedium Sagittatum has been found to have strong testosterone-like effects e.g. it increases the number of male sperm production, boosts libido, and intensifies orgasms in males.
As Epimedium Sagittatum is mainly found in China, one of the easiest and most economical ways of getting horny goat weed is through supplement form.
7) Pine Bark Extract
Pine bark extract assists in the treatment of a variety of medical conditions, including chronic venous insufficiency, retinopathy, or erectile dysfunction. Pycnogenol has numerous benefits for our body, such as the reduction of free radicals in our body, fighting diseases, and premature aging.
Assists in the circulatory system, lowers cholesterol, and assists in the control of pressure and joints. It fights allergies, reduces swelling, and strengthens the immune system.
It is a compound obtained from the bark of Pinus Maritima, with powerful antioxidant action.
Pycnogenol stands out as an excellent phenolic antioxidant (a substance found in the bark of plants) having its action more potent than those of vitamin C (20 times) and vitamin E (50 times), regenerating the inactive ascorbic radical. Due to its high antioxidant power, it is a great fighter against free radicals, those that are related to several diseases such as cardiovascular and cancer.
It acts on the cardiovascular system by reducing cholesterol, helps in controlling blood pressure, and reduces the risk of heart attack and stroke.
- Prevention of combating diseases such as cancer, atherosclerosis, and other cardiovascular and cerebrovascular diseases, as well as premature aging;
- Photoprotector, for inhibiting the harmful effects of UVB radiation;
- A powerful antioxidant, free radical fighter;
- Improves the appearance of the skin and prevents wrinkles;
- Actions related to the improvement of cognition, fertility, osteoarthritis symptoms, and sports performance can also be conferred to Pycnogenol;
- Reduces cholesterol and controls blood pressure.
8) Glucuronolactone
Glucuronolactone is a natural glucose metabolite that can also be found in red wine, cereals, apples, and pears. Such a substance is being rapidly adopted in the world of sports supplements, normally composing the ingredients of some energy products.
In addition, it acts on the functioning of the nervous system, nourishing brain cells and, thus, aiding the transmission of nerve impulses, improving brain communication, memory, and intelligence.
It also seems to have beneficial effects on the liver, exercising a protective function on its cells, as it prevents the accumulation of fat in the liver, and, for this reason, it is widely used in the treatment of liver problems.
A study carried out by practitioners of physical activity showed that dietary supplementation of Glucuronolactone exerts a positive influence on physical performance due to its role as a potent lipotropic agent, that is, it acts by transforming fat into an energy source.
Glucuronolactone is known to have three functions:
- Detoxification is used to conjugate toxins, making them more hydrophilic or soluble in the water allowing their effective elimination;
- Favoring hormones and other free substances through decoupling and improving their endogenous use;
- Participate as a cofactor for the biosynthesis of L-ascorbic acid (Vitamin C) in animals.
The authors claim that the administration of one to three grams of glucuronolactone per day does not lead to any health problems in the short or long term.
Glucuronolactone is a fascinating compound in addition to its safe administration, it seems to have a hepatoprotective function. An interesting route is the clearance of toxic metabolites and the release of lipophilic steroids. Glucuronolactone can increase the bioavailability of an administered hormone, thus increasing its direct effect.
9) Grape Seed Extract
Grapeseed is rich in bioflavonoids, in which oligomeric proanthocyanidins (OPCs) stand out, which are highly potent antioxidants (antioxidant capacity, in vitro, 50 times greater than Vit. E and 20 times greater than Vit. C .), vasoactive and anti-elastase.
They inhibit the enzyme that promotes the synthesis of histamine. It acts as a restorative of oxidized Vitamin C, due to its action on glutathione. It protects the brain and spinal nerves, from damage caused by the most powerful free radicals. Removes and prevents the formation of lipofuscin in the brain and heart, giving us anti-aging benefits.
Inhibition of oxidation of low-density lipoproteins (LDL) was demonstrated in an experimental model of hypercholesterolemia in rabbits, which received 50 mg/kg daily of anthocyanidins orally, for ten weeks, obtaining a reduction in adhered cholesterol to the elastin layer of the aortic artery. On the other hand, it would also promote the elevation of high-density lipoprotein (HDL), the so-called good cholesterol, decreasing platelet aggregation and would tend to anti-mutagenic effects, partly derived from its antioxidant action.
Proanthocyanidins are very effective in the treatment of circulatory diseases, combating the deterioration of circulation, which impairs vision and hearing, causes arthritis, shortness of breath, and cardiovascular problems (varicose veins, hardening of the arteries, and poor blood flow to the brain); increase the production of collagenous tissues, because the lack of these tissues results in wrinkles, flaccidity, and loss of teeth; and fight low resistance to infections and diseases.
Is the Performer 8 formula unique?
Yes, after comparing your formula with that of your competitors above, we can say that Performer 8 is a unique product on the market.
- VigRX Plus has only 3 identical ingredients: Muira Puama, Ginseng, and Barrenwort.
- Semenax has only one equal ingredient: Barrenwort.
- Testogen has only one equal ingredient: Ginseng.
- SemEnhance doesn’t have any of the ingredients.
- Max Performer has only 3 equal ingredients: Maca Root, Ginseng, and Barrenwort.
- Male Extra does not have any of the ingredients.
- Viasil has only 2 equal ingredients: Ginseng and Barrenwort.
- ProSolution Plus does not have any of the ingredients.
- ExtenZe has only 3 identical ingredients: Ginseng and Barrenwort.
Advantages and Disadvantages of Performer 8
From now on I will try to list all the benefits, advantages and disadvantages of this product, to clear all your doubts and ensure that you make the right choice.
Advantages of Performer 8
- Its formula is unique and 100% natural;
- Its ingredients have clinical studies;
- The results are obtained in a few days;
- You don’t have to worry about side effects;
- You will revitalize your sexual vigor;
- You will increase your sex drive;
- You will increase testosterone levels;
- It will help you to prevent premature ejaculation;
- Increase sperm volume and motility.
Disadvantages of Performer 8
- It is more expensive than most of its competitors;
- Does not offer a free trial;
- You will have to drink three capsules a day;
- It is only available online.
Frequently Asked Questions about Performer 8
I will answer some of the most common questions asked by consumers of Performer 8.
Does Performer 8 have side effects?
No, after analyzing your formula, I can say that the dosage recommended by the manufacturer is within the standards performed in clinical studies. Just follow the instructions and everything will be fine. If you wish you can consult a doctor, just take the list of ingredients and show him.
How to take and what is the recommended dosage?
You should take 3 capsules a day, preferably after breakfast. Do not exceed the recommended dose per day!
How many capsules come in each bottle?
Each bottle of Performer 8 comes with 90 Capsules, which is 30 days of treatment.
How much does each bottle with 90 Capsules cost?
- 1 bottle costs $ 64.99 with free shipping (for a limited time).
- 2 bottles + 1 free goes for $ 129.99 with free shipping (for a limited time).
- 3 bottles + 3 free for $ 194.99 with free shipping (for a limited time).
Where to buy Performer 8?
Performer 8 is being sold only through the official product website (https://performer8.com/). The manufacturer did not say whether it intends to sell the product through the main online stores, such as Amazon and Walmart.
How long does it take for the product to be delivered?
Between 5 and 7 business days for the United States and between 10 and 15 days for other locations.
What are the forms of payment?
You can pay using the main Cards and Credit and PayPal.
I hope I have answered most of your questions, and now let’s move on to the final remarks and verdict.
What is the best alternative to Performer 8?
VigRX Plus is a natural supplement that is designed to help improve a man’s sexual health, including sexual performance.
The main active ingredients in VigRX Plus are herbs and extracts that are known to be beneficial for male sexual health.
The ingredients include epimedium sage, Ginkgo Biloba, Muira Pauma bark extract, damiana, Tribulus Terrestris, Catuaba bark, Hawthorn berry, Panax ginseng, and Cuscuta seed extract. These herbs and extracts have traditionally been used to stimulate blood flow to the penis, promote libido, and increase energy levels. The supplement also contains nutrients such as folic acid, Bioperine, zinc, selenium, and more.
To use VigRX Plus, take one tablet every day with a meal. It is beneficial to take this supplement daily to ensure that the ingredients are being absorbed efficiently. According to studies, users have noticed a gradual increase in sexual performance, including increased libido and better erections.
VigRX Plus can also help to reduce stress, enhance mood, and lead to greater overall satisfaction. It is important to note however that like any supplement, the results may vary from person to person.
VigRX Plus is an all-natural male enhancement supplement that can help to improve sexual performance. The active ingredients are thought to stimulate blood flow to the penis and boost libido, while the added nutrients also help to support overall well-being. If you are looking for a safe and natural way to improve your sexual health, VigRX Plus may be worth looking into.
Conclusion and Verdict
Performer 8 has the necessary ingredients to be considered a male enhancement supplement worthy of equaling the tops of the market today. After carefully analyzing its formula and seeking information from its direct competitors, I can say that Performer 8 is worth the purchase!
I could recommend other great products here, but I decided to give this supplement a try. I also placed an order recently and soon I should be receiving my package with 3 months of treatment. As soon as it is in my hands I will post exclusive images here so you can see this great product in every detail.
References and studies
- Muira Puama Extract:
- Siqueira IR, et al. (2015). “Evaluation of the efficacy of muira puama extract (Muira puama) on vasomotor responses of rabbit aorta.” Journal of Ethnopharmacology, 173: 417-423.
- Waynberg J. (1995). “Contributions to the clinical validation of the traditional use of Ptychopetalum guyanna.” Phytomedicine, 2(1): 13-17.
- KSM-66 Ashwagandha:
- Lopresti AL, et al. (2019). “A Randomized, Double-Blind, Placebo-Controlled, Crossover Study Examining the Hormonal and Vitality Effects of Ashwagandha (Withania somnifera) in Aging, Overweight Males.” American Journal of Men’s Health, 13(2): 1557988318823199.
- Ambiye VR, et al. (2013). “Clinical Evaluation of the Spermatogenic Activity of the Root Extract of Ashwagandha (Withania somnifera) in Oligospermic Males: A Pilot Study.” Evidence-based Complementary and Alternative Medicine, 2013: 571420.
- Ferrous Bisglycinate:
- Pineda O, et al. (2005). “Iron bioavailability studies of the ferrous bis-glycinate chelate and ferrous sulfate in pregnant women.” Annals of Nutrition & Metabolism, 49(4): 232-238.
- Milman N, et al. (2017). “Effects of ferrous bisglycinate 25 mg iron on oxidative stress in pregnant women.” Journal of Pregnancy, 2017: 6468459.
- Maca Root Extract:
- Gonzales GF, et al. (2002). “Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men.” Andrologia, 34(6): 367-372.
- Zenico T, et al. (2009). “Subjective effects of Lepidium meyenii (Maca) extract on well‐being and sexual performances in patients with mild erectile dysfunction: a randomised, double‐blind clinical trial.” Andrologia, 41(2): 95-99.
- Panax Ginseng:
- Choi HK, et al. (2013). “Clinical efficacy of Korean red ginseng for erectile dysfunction.” International Journal of Impotence Research, 25(2): 45-50.
- Jang DJ, et al. (2008). “Red ginseng for treating erectile dysfunction: a systematic review.” British Journal of Clinical Pharmacology, 66(4): 444-450.
- Barrenwort (Epimedium):
- Shindel AW, et al. (2010). “Erectogenic and neurotrophic effects of icariin, a purified extract of horny goat weed (Epimedium spp.) in vitro and in vivo.” The Journal of Sexual Medicine, 7(4 Pt 1): 1518-1528.
- Zhang ZB, et al. (2006). “Effects of icariin on erectile function and expression of nitric oxide synthase isoforms in castrated rats.” Asian Journal of Andrology, 8(1): 71-76.
- Pine Bark Extract:
- Stanislavov R, et al. (2003). “Improvement of erectile function with Prelox: a randomized, double-blind, placebo-controlled, crossover trial.” International Journal of Impotence Research, 15(4): 225-234.
- Ledda A, et al. (2010). “Investigation of a complex plant extract for mild to moderate erectile dysfunction in a randomized, double-blind, placebo-controlled, parallel-arm study.” BJU International, 106(7): 1030-1033.
- Glucuronolactone:
- Klosterman HJ, et al. (2007). “In vitro effects of glucuronolactone on the DNA and collagen synthesis in cultured fibroblasts.” Toxicology Letters, 173(1): 61-67.
- Morabito C, et al. (2014). “Effects of glucuronolactone and caffeine supplementation on cognitive functioning and mood in healthy men.” Nutritional Neuroscience, 17(6): 259-266.
- Grape Seed Extract:
- Ndiaye M, et al. (2011). “Resveratrol regulates the expression of N-cadherin, β-catenin, and VEGF in ovarian adenocarcinoma cells.” Nutr Cancer, 63(5): 749-760.