Irwin Naturals Rapid Acting Testosterone UP®, ThermoBurn-MAX, 60 Liquid Soft-Gels supplement bottle
Irwin Naturals

Rapid Acting Testosterone UP®, ThermoBurn-MAX, 60 Liquid Soft-Gels

What We Researched
16 active ingredients analyzed · 11 inactive ingredients decoded · 1 brand certification checked · 1 retailer compared · Last updated: Mar 2026
86
Product Score Good
78
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Total Carbohydrates 2 g 1%**
Vitamin D3 (as Cholecalciferol) (2000 IU) 50 mcg 250%
Vitamin B6 (as Pyridoxine Hydrochloride) 5 mg 294%
Vitamin B12 (as Methylcobalamin) 25 mcg 1042%
Chromium (as Chromium Picolinate) 200 mcg 571%
Flaxseed Oil (seed) 2000 mg
Testosurge® Fenugreek extract (seed) 500 mg
Guaraná (Paullinia cupana) extract (12% caffeine, 50.4 mg)(seed) 420 mg
Ashwagandha extract (4:1)(root) 300 mg
Cayenne powder (30,000 HU)(fruit) 100 mg
ThermoGP™ Grains of Paradise extract (seed) 40 mg
Boron (as Boron Chelate) 6 mg
BioPerine ComplexBioPerine® Black Pepper extract (95% piperine)(fruit), Ginger extract (5% gingerols)(rhizome) 6 mg
Bioavailability Good

Absorption Rating

  • Total Carbohydrates Fair
  • Vitamin D3 (as Cholecalciferol) (2000 IU) Good
  • Vitamin B6 (as Pyridoxine Hydrochloride) Fair
  • Vitamin B12 (as Methylcobalamin) Good
  • Chromium (as Chromium Picolinate) Good
  • Flaxseed Oil (seed) Good
  • Testosurge® Fenugreek extract (seed) Fair
  • Guaraná (Paullinia cupana) extract (12% caffeine, 50.4 mg)(seed) Fair
  • Ashwagandha extract (4:1)(root) Good
  • Cayenne powder (30,000 HU)(fruit) Fair
  • ThermoGP™ Grains of Paradise extract (seed) Fair
  • 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

  • Gelatin
  • Purified Water
  • Maltodextrin
  • Glycerin
  • Beeswax
  • Sunflower Lecithin
  • Annatto (Color)
  • Titanium Dioxide (Color) Medium
  • St. John's Bread (Carob) (Color)
  • Mannitol
  • Silicon dioxide and Turmeric (color)
Efficacy Very Good

Dosage Analysis

  • Vitamin D3 (as Cholecalciferol) (2000 IU) 50 mcg Effective
  • Vitamin B6 (as Pyridoxine Hydrochloride) 5 mg Effective
  • Vitamin B12 (as Methylcobalamin) 25 mcg Effective
  • Chromium (as Chromium Picolinate) 200 mcg Effective
  • Flaxseed Oil (seed) 2000 mg Effective
  • Testosurge® Fenugreek extract (seed) 500 mg Effective
  • Guaraná (Paullinia cupana) extract (12% caffeine, 50.4 mg)(seed) 420 mg Under-dosed
  • Ashwagandha extract (4:1)(root) 300 mg Effective
  • Cayenne powder (30,000 HU)(fruit) 100 mg High
  • ThermoGP™ Grains of Paradise extract (seed) 40 mg Effective
  • Boron (as Boron Chelate) 6 mg Effective
  • BioPerine ComplexBioPerine® Black Pepper extract (95% piperine)(fruit), Ginger extract (5% gingerols)(rhizome) 6 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Calories 30
Total Fat 2 g 3%**
Total Carbohydrates 2 g 1%**
Protein 2 g
Vitamin D3 (as Cholecalciferol) (2000 IU) 50 mcg 250%
Vitamin B6 (as Pyridoxine Hydrochloride) 5 mg 294%
Vitamin B12 (as Methylcobalamin) 25 mcg 1042%
Chromium (as Chromium Picolinate) 200 mcg 571%
Flaxseed Oil (seed) 2000 mg
Testosurge® Fenugreek extract (seed) 500 mg
Guaraná (Paullinia cupana) extract (12% caffeine, 50.4 mg)(seed) 420 mg
Ashwagandha extract (4:1)(root) 300 mg
Cayenne powder (30,000 HU)(fruit) 100 mg
ThermoGP™ Grains of Paradise extract (seed) 40 mg
Boron (as Boron Chelate) 6 mg
BioPerine ComplexBioPerine® Black Pepper extract (95% piperine)(fruit), Ginger extract (5% gingerols)(rhizome) 6 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Purified Water Safe

Dissolves and carries water-soluble ingredients.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

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.

Titanium Dioxide (Color) Caution

It is used to improve the appearance of the supplement.

St. John's Bread (Carob) (Color) Safe

It is used to provide a brown color to supplements.

Mannitol Generally_safe

It is used as a sweetener, filler, and flow agent.

Silicon dioxide and Turmeric (color) Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$37$36$35$34$33 Mar 12 $35.00
iHerb

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 Rapid Acting Testosterone UP®, ThermoBurn-MAX a good supplement?

Irwin Naturals Rapid Acting Testosterone UP®, ThermoBurn-MAX, 60 Liquid Soft-Gels received a product quality score of 86/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 16 active ingredients with 15 servings per container. Of the 11 inactive ingredients, 6 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 Rapid Acting Testosterone UP®, ThermoBurn-MAX?

Irwin Naturals Rapid Acting Testosterone UP®, ThermoBurn-MAX contains 16 active ingredients: Calories (30), Total Fat (2 g), Total Carbohydrates (2 g), Protein (2 g), Vitamin D3 (as Cholecalciferol) (2000 IU) (50 mcg), Vitamin B6 (as Pyridoxine Hydrochloride) (5 mg), and 10 more. Notable high-dose ingredients include Vitamin D3 at 250% DV, Vitamin B6 at 294% DV, Vitamin B12 at 1042% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Irwin Naturals Rapid Acting Testosterone UP®, ThermoBurn-MAX safe to take?

Irwin Naturals Rapid Acting Testosterone UP®, ThermoBurn-MAX, 60 Liquid Soft-Gels has been analyzed for ingredient safety across all its components. Of 11 inactive ingredients, 6 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.