Irwin Naturals Testosterone UP Prostate Defense™, Dual-Action, 60 Liquid Soft-Gels supplement bottle
Irwin Naturals

Testosterone UP Prostate Defense™, Dual-Action, 60 Liquid Soft-Gels

What We Researched
17 active ingredients analyzed · 11 inactive ingredients decoded · 1 brand certification checked · 3 retailers compared · Last updated: Mar 2026
80
Product Score Good
78
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Total Carbohydrates 1 g <1%**
Vitamin D3 (as Cholecalciferol) (1000 IU) 25 mcg 125%
Zinc (as Zinc Citrate) 15 mg 136%
Copper (as Copper Citrate) 1 mg 111%
Pumpkin Oil (seed) 600 mg
KSM-66® Ashwagandha extract (root) 337.5 mg
Fenugreek extract (4:1)(seed) 100 mg
Green Tea extract (50% EGCG, 50 mg) (leaf) 100 mg
Turmeric extract (95% curcuminoids, 95 mg)(root) 100 mg
Plant Sterols (form sunflower) (34% beta sitosterol, 30 mg) 88 mg
Stinging Nettle extract (15:1)(root) 75 mg
Lyc-O-Mato™ (15% lycopene, 5.2 mg) 35 mg
Boron (as Boron Chelate) 5 mg
BioPerine ComplexBioperine® Black Pepper extract (95% piperine)(fruit), Ginger extract (5% gingerols)(rhizome) 3 mg
Bioavailability Very Good

Absorption Rating

  • Total Carbohydrates Fair
  • Vitamin D3 (as Cholecalciferol) (1000 IU) Good
  • Zinc (as Zinc Citrate) Good
  • Copper (as Copper Citrate) Good
  • Pumpkin Oil (seed) Good
  • KSM-66® Ashwagandha extract (root) Good
  • Fenugreek extract (4:1)(seed) Fair
  • Green Tea extract (50% EGCG, 50 mg) (leaf) Good
  • Turmeric extract (95% curcuminoids, 95 mg)(root) Good
  • Plant Sterols (form sunflower) (34% beta sitosterol, 30 mg) Good
  • Stinging Nettle extract (15:1)(root) Fair
  • Lyc-O-Mato™ (15% lycopene, 5.2 mg) Good
  • Boron (as Boron Chelate) Fair
  • BioPerine ComplexBioperine® Black Pepper extract (95% piperine)(fruit), Ginger extract (5% gingerols)(rhizome) Good
Other Ingredients Very Good

Fillers & Additives

  • Flaxseed Oil
  • Gelatin
  • Purified Water
  • Glycerin
  • Beeswax
  • Sunflower Lecithin
  • Annatto (Color)
  • Dextrin
  • Titanium Dioxide (Color) Medium
  • Silicon Dioxide
  • Sodium copper chlorophyllin (color) and Maltodextrin
Efficacy Fair

Dosage Analysis

  • Vitamin D3 (as Cholecalciferol) (1000 IU) 25 mcg Effective
  • Zinc (as Zinc Citrate) 15 mg Effective
  • Copper (as Copper Citrate) 1 mg Effective
  • Pumpkin Oil (seed) 600 mg Effective
  • KSM-66® Ashwagandha extract (root) 337.5 mg Effective
  • Fenugreek extract (4:1)(seed) 100 mg Under-dosed
  • Green Tea extract (50% EGCG, 50 mg) (leaf) 100 mg Under-dosed
  • Turmeric extract (95% curcuminoids, 95 mg)(root) 100 mg Under-dosed
  • Plant Sterols (form sunflower) (34% beta sitosterol, 30 mg) 88 mg Under-dosed
  • Stinging Nettle extract (15:1)(root) 75 mg Under-dosed
  • Lyc-O-Mato™ (15% lycopene, 5.2 mg) 35 mg High
  • Boron (as Boron Chelate) 5 mg Effective
  • BioPerine ComplexBioperine® Black Pepper extract (95% piperine)(fruit), Ginger extract (5% gingerols)(rhizome) 3 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 20
Total Fat 1.5 g 2%**
Total Carbohydrates 1 g <1%**
Protein <1 g
Vitamin D3 (as Cholecalciferol) (1000 IU) 25 mcg 125%
Zinc (as Zinc Citrate) 15 mg 136%
Copper (as Copper Citrate) 1 mg 111%
Pumpkin Oil (seed) 600 mg
KSM-66® Ashwagandha extract (root) 337.5 mg
Fenugreek extract (4:1)(seed) 100 mg
Green Tea extract (50% EGCG, 50 mg) (leaf) 100 mg
Turmeric extract (95% curcuminoids, 95 mg)(root) 100 mg
Plant Sterols (form sunflower) (34% beta sitosterol, 30 mg) 88 mg
Stinging Nettle extract (15:1)(root) 75 mg
Lyc-O-Mato™ (15% lycopene, 5.2 mg) 35 mg
Boron (as Boron Chelate) 5 mg
BioPerine ComplexBioperine® Black Pepper extract (95% piperine)(fruit), Ginger extract (5% gingerols)(rhizome) 3 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Flaxseed Oil Safe

Carrier oil that also provides alpha-linolenic acid (ALA).

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Purified Water Safe

Dissolves and carries water-soluble ingredients.

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Beeswax Safe

Used as a coating and to help form softgel capsules.

Sunflower Lecithin Safe

Helps mix oil and water-based ingredients. Allergen-free alternative to soy lecithin.

Annatto (Color) Generally_safe

It is used as a natural food coloring to provide a yellow or orange hue.

Dextrin Generally_safe

It is used as a filler, binder, or coating agent.

Titanium Dioxide (Color) Caution

It is used to improve the appearance of the supplement.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Sodium copper chlorophyllin (color) and Maltodextrin Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$42$39$37$34$32 Mar 12 $39.99$33.99
iHerb
Vitacost

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Irwin Naturals

Founded 1994 · Los Angeles, California, United States · 130 products · irwinnaturals.com/

Certifications

1 certification
Nsf Gmp Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Coa Availability — Verified Source
Testing Lab Disclosure — Claimed

Violation History

2 incidents
Lawsuit Deceptively marketing products as 'natural' while they contain synthetic ingredients.2021Source
Prop 65 Lead2011-02-02Source
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Frequently Asked Questions
Is Irwin Naturals Testosterone UP Prostate Defense™, Dual-Action a good supplement?

Irwin Naturals Testosterone UP Prostate Defense™, Dual-Action, 60 Liquid Soft-Gels received a product quality score of 80/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 17 active ingredients with 30 servings per container. Of the 11 inactive ingredients, 7 are rated safe and 1 are flagged for review. The manufacturer, Irwin Naturals, holds a brand trust score of 78/100 with 1 verified certifications including Nsf Gmp.

What are the ingredients in Irwin Naturals Testosterone UP Prostate Defense™, Dual-Action?

Irwin Naturals Testosterone UP Prostate Defense™, Dual-Action contains 17 active ingredients: Calories (20), Total Fat (1.5 g), Total Carbohydrates (1 g), Protein (<1 g), Vitamin D3 (as Cholecalciferol) (1000 IU) (25 mcg), Zinc (as Zinc Citrate) (15 mg), and 11 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Irwin Naturals Testosterone UP Prostate Defense™, Dual-Action safe to take?

Irwin Naturals Testosterone UP Prostate Defense™, Dual-Action, 60 Liquid Soft-Gels has been analyzed for ingredient safety across all its components. Of 11 inactive ingredients, 7 are rated safe. 1 ingredient is flagged for review: Titanium Dioxide (Color). 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Irwin Naturals a trustworthy supplement brand?

Irwin Naturals receives a brand trust score of 78/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1994 and headquartered in Los Angeles, California, United States, the company offers 130 products in their lineup. They hold 1 verified certifications including Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Irwin Naturals has 2 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.