πŸ”¬ Scientific Analysis

Viriflow Ingredients: All 12 Components with Research Evidence

Updated March 2026  |  16-min read  |  Research-Based

Knowing exactly what's in a supplement is essential before using it. This article provides a complete scientific analysis of all 12 Viriflow ingredients, with references to the clinical evidence supporting each one. For context on the overall formula strategy, see our Viriflow supplement guide.

01

Saw Palmetto

ProstateDHT Blocker

The most clinically researched herbal treatment for benign prostatic hyperplasia (BPH). Saw Palmetto's liposterolic extract inhibits 5-alpha-reductase, the enzyme that converts testosterone into dihydrotestosterone (DHT) β€” the primary driver of prostate cell proliferation and enlargement. By reducing DHT accumulation in prostate tissue, Saw Palmetto helps maintain healthy prostate size and reduces urinary symptoms.

A systematic review of 18 randomized controlled trials involving nearly 3,000 men found Saw Palmetto significantly improved urinary symptoms and flow measures with excellent tolerability and minimal side effects compared to prescription alternatives.

Research: Journal of Urology systematic review β€” 18 RCTs, 2,939 men. Saw Palmetto improved urinary symptoms vs placebo. American Urological Association recognizes it as a widely studied natural option for BPH.
02

Pygeum Africanum

ProstateAnti-Inflammatory

Extracted from the bark of the African plum tree, Pygeum Africanum contains pentacyclic triterpenoids that inhibit prostaglandin synthesis β€” reducing prostate inflammation from a different biochemical pathway than Saw Palmetto. This complementary mechanism makes Pygeum particularly valuable when combined with Saw Palmetto, as together they address both DHT-driven growth and inflammatory swelling.

A meta-analysis of 18 RCTs found Pygeum produced a 19% improvement in peak urine flow, 19% reduction in nighttime urination, and 24% decrease in residual urine volume. Benefits were most pronounced with consistent 60–90 day use.

Research: Cochrane Database meta-analysis β€” 18 trials, 1,562 men. Pygeum africanum significantly improved urinary parameters compared to placebo.
03

Stinging Nettle Root

HormonalUrinary

Urtica dioica root contains lectins and polysaccharides that interfere with sex hormone binding globulin (SHBG) β€” a protein that binds free testosterone, reducing its availability. By competing with SHBG, Nettle Root may help maintain higher levels of biologically active free testosterone while simultaneously exhibiting anti-inflammatory effects on prostate tissue.

Clinical research demonstrates that Nettle Root combined with Saw Palmetto produces superior urinary symptom improvements compared to either herb alone β€” a synergy that makes it particularly valuable in a multi-ingredient formula like Viriflow.

Research: A double-blind trial published in Planta Medica found the Nettle Root + Saw Palmetto combination significantly outperformed Saw Palmetto alone in improving BPH symptoms over 24 weeks.
04

Beta-Sitosterol

ProstateUrinary Flow

Beta-Sitosterol is the most directly evidence-backed ingredient in the Viriflow formula for improving measurable BPH symptoms. As the most abundant plant sterol in human diet (naturally found in nuts, seeds, and vegetables), it modulates inflammatory signaling, inhibits 5-alpha-reductase, and helps regulate prostate cell growth by supporting cell membrane integrity.

Four randomized, placebo-controlled trials totaling 519 men showed Beta-Sitosterol improved International Prostate Symptom Scores by 7.4 points vs 2.2 for placebo β€” a statistically significant difference that persisted through long-term follow-up. Peak urinary flow rate increased by 3.91 ml/s on average.

Research: British Journal of Urology β€” 4 placebo-controlled RCTs, 519 men. Beta-sitosterol produced significant, sustained improvements in prostate symptom scores and urinary flow.
05

Zinc

HormonalMineral

Zinc is arguably the most essential mineral for male reproductive and prostate health. The prostate gland contains the highest concentration of zinc of any soft tissue in the human body β€” a fact that immediately underscores its importance. Zinc serves as a co-factor in testosterone synthesis, regulates prostate cell growth, has direct antibacterial properties that protect against prostatitis, and supports immune function broadly.

Multiple studies confirm that men with prostate problems have significantly lower prostatic zinc levels than men with healthy prostates. Zinc supplementation has been shown to reduce prostate volume and improve symptom scores, particularly in zinc-deficient individuals.

Research: Indian Journal of Urology β€” zinc supplementation reduced prostate volume and improved symptom scores. Journal of Nutrition β€” zinc deficiency in men over 40 directly correlates with reduced testosterone and increased prostate growth factors.
06

Pumpkin Seed Extract

BladderAnti-Inflammatory

Pumpkin seeds are rich in phytosterols (similar in structure to Beta-Sitosterol), essential fatty acids (omega-3 and omega-6), and zinc β€” providing a natural matrix of prostate-supportive compounds in one extract. The phytosterols in pumpkin seed inhibit DHT at the cellular receptor level, while the fatty acids reduce prostate inflammation. The zinc content complements the formula's dedicated zinc inclusion.

A 12-month double-blind trial found pumpkin seed oil significantly improved BPH symptom scores and quality of life in men with mild to moderate BPH, with benefits improving progressively over the study period.

Research: A 2009 study in Nutrition Research and Practice found pumpkin seed oil supplementation for 12 months significantly improved International Prostate Symptom Scores compared to placebo.
07

Lycopene

AntioxidantCell Protection

Lycopene is a carotenoid antioxidant found in tomatoes, watermelon, and pink grapefruit that has attracted significant scientific attention for its prostate-protective properties. It is a singlet oxygen quencher β€” one of nature's most effective neutralizers of the reactive oxygen species that damage prostate DNA and promote cellular dysfunction. Crucially, Lycopene accumulates preferentially in prostate tissue, making it a particularly targeted antioxidant for this organ.

Epidemiological data from large population studies consistently show that men with higher dietary lycopene intake have meaningfully lower rates of prostate health concerns. A review of 26 intervention studies confirmed lycopene supplementation improves PSA levels and reduces oxidative stress markers in prostate tissue.

Research: Journal of Nutritional Science β€” review of 26 studies confirming lycopene's benefits for prostate markers. Harvard Nurses' Health Study-style epidemiological data supports inverse relationship between lycopene intake and prostate concerns.
08

Quercetin

Anti-InflammatoryCirculation

Quercetin is a plant flavonoid found in onions, apples, and capers that exerts potent anti-inflammatory effects by inhibiting NF-ΞΊB β€” a master regulator of inflammatory gene expression in prostate tissue. It also inhibits COX-2 and LOX enzymes, reducing the prostaglandin and leukotriene signaling that drives chronic prostate inflammation. Separately, Quercetin relaxes smooth muscle tissue in the bladder neck and urethra, improving urinary flow mechanics.

A landmark randomized trial published in Urology found that men with chronic prostatitis-related symptoms taking Quercetin experienced a 25% improvement in symptom scores vs placebo β€” a clinically meaningful result achieved in just 4 weeks.

Research: Urology (Shoskes et al., 1999) β€” placebo-controlled RCT, men with CP/CPPS. Quercetin produced 25% improvement in NIH-Chronic Prostatitis Symptom Index vs placebo.
09

Green Tea Extract (EGCG)

AntioxidantMetabolism

Green Tea Extract is standardized to its primary bioactive β€” epigallocatechin gallate (EGCG), one of the most powerful polyphenol antioxidants in the plant kingdom. For prostate health, EGCG inhibits angiogenesis (new blood vessel formation that can support abnormal tissue growth), induces apoptosis in abnormal cells, and reduces inflammation. As a metabolic ingredient, EGCG activates AMPK β€” a key enzyme in cellular energy sensing that also regulates fat metabolism.

Green Tea Extract also modestly boosts resting metabolic rate, supporting the weight management component of Viriflow's wellness profile. Excess adipose tissue is associated with elevated estrogen conversion (aromatization), which negatively impacts testosterone-estrogen balance and prostate health.

Research: Multiple RCTs document EGCG's antioxidant and metabolic benefits. Studies on prostate cell lines show EGCG inhibits proliferation pathways β€” though human clinical evidence is still accumulating.
10

Vitamin E

AntioxidantFat-Soluble

Vitamin E (as mixed tocopherols) is the body's primary fat-soluble antioxidant, protecting lipid-rich cell membranes β€” including the phospholipid bilayer of every prostate cell β€” from oxidative damage. It works synergistically with Selenium (another Viriflow ingredient) in the glutathione peroxidase system, providing enhanced antioxidant protection that neither provides alone. Vitamin E also supports immune function and healthy blood vessel integrity.

Research: Vitamin E and Selenium combination (as studied in SELECT trial and predecessor studies) demonstrates synergistic antioxidant protection. Current evidence supports the combination's role in cellular defense for prostate tissue.
11

Selenium

AntioxidantThyroid

Selenium is a trace mineral essential for the synthesis of glutathione peroxidase β€” the body's primary enzymatic antioxidant system. Adequate selenium is required for healthy thyroid function (thyroid hormones regulate metabolic rate and indirectly affect testosterone production), immune competence, and DNA repair mechanisms. Epidemiological data consistently shows that men with higher blood selenium levels have lower rates of prostate health concerns.

Research: The NPC Trial (Clark et al., 1996) found selenium supplementation associated with significant reductions in prostate concerns in men with low baseline selenium levels β€” one of the studies that catalyzed interest in selenium for prostate health.
12

Graminex Flower Pollen Extract

UrinaryProstate Comfort

Graminex is a standardized flower pollen extract that has been clinically studied specifically for prostatitis and urinary symptoms. Its active fractions (T60 and GBX) work through multiple mechanisms: inhibiting 5-alpha-reductase, relaxing smooth muscle in the bladder neck, reducing mast cell-driven inflammation, and improving bladder contractility. It is one of the few botanicals supported by double-blind clinical trials specifically conducted in men with prostatitis rather than just BPH.

Research: A double-blind, placebo-controlled trial in British Journal of Urology found Graminex improved symptom scores and quality of life in men with chronic non-bacterial prostatitis significantly more than placebo.

Ingredient Summary Table

IngredientPrimary RoleEvidence Strength
Saw PalmettoDHT reduction, prostate sizeVery Strong (18 RCTs)
Pygeum AfricanumAnti-inflammatory, urinary flowStrong (18-trial meta)
Stinging Nettle RootSHBG, hormonal balanceModerate + synergy
Beta-SitosterolSymptom scores, urinary flowVery Strong (4 RCTs)
ZincTestosterone, prostate protectionVery Strong (established)
Pumpkin Seed ExtractPhytosterols, bladder supportStrong (12-mo RCT)
LycopeneAntioxidant, cell protectionStrong (26-study review)
QuercetinAnti-inflammatory, flowStrong (RCT β€” 25% improvement)
Green Tea ExtractAntioxidant, metabolismModerate–Strong
Vitamin ECell membrane protectionStrong (established)
SeleniumGlutathione system, immuneStrong (NPC Trial)
Graminex PollenProstatitis, urinary comfortModerate (specialty trials)