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VO2 Max Performance Fat Burner

Irwin Naturals
4.3
★ ★ ★ ★ ★
(210 ratings)
Ashwagandha 300 mg
Green Tea 270 mg
Caffeine 75 mg
Product Image
Score91

A balanced performance supplement that combines metabolic support with adaptogens for energy and focus.

How scoring works
Quantity:60 Softgel(s) • (30 servings)
Goals:
Energy
Brain Health
Cognitive Support
Anti-Inflammatory Support
Productivity Boost
Mental Focus
Fitness
Anti-Aging

Score 91

A balanced performance supplement that combines metabolic support with adaptogens for energy and focus.

How scoring works
$28.99($0.96 per serving)
Pure Formulas
$ 29.99
Amazon
$ 28.99
iHerb
$ 29.99
Vitacost
$ 29.99
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Analysis

This formula features a clinical 300mg dose of ashwagandha to help the body handle physical stress from intense training. It also includes 270mg of EGCG and a moderate 75mg of caffeine to support alertness and fat oxidation.

The use of MCT oil and flaxseed oil provides healthy fats that may support energy and nutrient absorption. It fits best for individuals looking for a balanced stimulant that also focuses on recovery and performance.

Pros

  • Clinical 300mg dose of KSM-66 Ashwagandha
  • Includes BioPerine for better absorption
  • Moderate 75mg caffeine dose is versatile
  • Uses liquid softgels for delivery

Cons

  • Contains multiple sources of caffeine
  • Expensive for a 30-day supply
  • Proprietary BioPerine complex hides specifics

Warnings

  • Monitor for mild stimulant effects
  • Consult a doctor if you have a thyroid condition
  • Avoid taking close to your sleep time

Nutrient quality

95 Highest impact

Utilization of KSM-66 ashwagandha and methylated B12 indicates a focus on high-quality, bioavailable nutrient forms. Dosages for the primary adaptogenic and tea extracts are robust and clinically relevant.

Ingredient transparency

96 Highest impact

Labeling is highly transparent, providing specific milligram amounts and standardization details for almost all active components. This clarity allow users to precisely judge the potency of the adaptogenic and metabolic markers.

Customer satisfaction

86 Highest impact

Strong average ratings indicate that users find the formula effective for maintaining focus and energy during stressful periods. Feedback often highlights the benefits of the ashwagandha and tea extract combination.

Value for money

86 Highest impact

Price per serving is justified by the inclusion of multiple premium branded extracts and highly bioavailable nutrient forms. While priced higher than basic vitamins, the functional depth offers high value.

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Goals

Energy
Impact
Highest effect
A+ Goal FitA Strength of SupportA+ CoverageA+ Formula Quality

KSM-66 Ashwagandha and green tea extract are paired with coffee-derived caffeine to support both metabolic boost and stress resilience. These ingredients work by increasing fuel utilization and reducing the impact of stress on physical energy levels.

A 75mg caffeine dose appears well aligned for individuals seeking mild stimulation with minimal jitter risk. The inclusion of KSM-66 at a clinically relevant 300mg dose ensures that the adaptogenic pathway is meaningfully addressed.

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Brain Health
Impact
Highest effect
A+ Goal FitA Strength of SupportA CoverageA+ Formula Quality

KSM-66 ashwagandha extract and caffeine provide focused support for cognitive performance and stress resilience. Standardized root extract provides high-quality evidence for biological activity and manage mental fatigue.

The inclusion of B-vitamins and green tea extract contributes to foundational brain energy metabolism and neuroprotection. Branded extracts and absorption enhancers ensure a high biological impact for cognitive goals.

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Cognitive Support
Impact
Highest effect
A Goal FitA+ Strength of SupportA CoverageA Formula Quality

KSM-66 Ashwagandha and Green Tea extract provide a synergistic approach to managing stress-related cognitive fatigue and promoting focus. These ingredients appear well aligned with goals for enhancing mental endurance during intense periods of exertion.

A robust 300mg dose of KSM-66 ensures the formula meets therapeutic benchmarks for adaptogenic support. This transparently labeled product addresses multiple pathways to support neurological resilience and maintain clear mental performance.

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Productivity Boost
Impact
Highest effect
A Goal FitA Strength of SupportA CoverageA Formula Quality

KSM-66 ashwagandha root extract and moderate caffeine from coffee support a healthy stress response and increased alertness. These ingredients may contribute to improved focus and reduced mental fatigue throughout the day.

The inclusion of green tea and schisandra appears well aligned with supporting both cognitive endurance and metabolic energy. Providing 300mg of branded ashwagandha offers focused support for the neurological pathways associated with stress-induced productivity decline.

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Anti-Inflammatory Support
Impact
Highest effect
A- Goal FitA+ Strength of SupportA CoverageA Formula Quality

Standardized EGCG and KSM-66 ashwagandha combine to support healthy antioxidant status and systemic resilience. These ingredients target several distinct pathways, including free radical neutralization and the management of stress-induced signaling markers.

The use of softgel delivery and BioPerine ensures that the plant-based constituents are effectively absorbed into the system. This comprehensive approach is well-aligned with the goal of maintaining a healthy inflammatory balance during physical activity.

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Mental Focus
Impact
Highest effect
A Goal FitA- Strength of SupportA- CoverageA Formula Quality

Combines KSM-66 Ashwagandha with Caffeine and Green Tea extract to provide adaptogenic support alongside mild stimulation. This blend helps sustain mental performance during physical or environmental stress.

The inclusion of methylated B-vitamins ensures high bioavailability for baseline neurological cofactors. This supplement is an excellent choice for individuals who need to stay focused and alert during intense physical training.

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Ingredients

IngredientAmount per serving
Calories
15 Calorie(s)
Total Fat
1 Gram(s)
Total Carbohydrates
1 Gram(s)
Protein
1 Gram(s)
Niacin (Niacinamide)
 10 mg
Vitamin B6 (Pyridoxine Hydrochloride)
 5 mg
Folate
340 mcg DFE
Vitamin B12 (Methylcobalamin)
 50 mcg
Pantothenic Acid (Calcium D-Pantothenate)
 15 mg
Flaxseed Oil
850 mg
Medium Chain Triglyceride Oil
500 mg
KSM-66 Ashwagandha extract (Withanolides)
 300 mg
Green Tea extract (EGCG, Polyphenols)
 270 mg
Maca powder
250 mg
Schisandra extract
150 mg
Caffeine (Coffee)
 75 mg
BioPerine Complex
3 mg
Women Women 18–50
Report overview
Ashwagandha (Withanolides) · 300 mg OverallScore82
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value
This high-performance formula features top-tier KSM-66 ashwagandha with an added bioavailability enhancer for maximum efficacy. While it is a premium-priced product, it offers high quality and potent ingredients.
View ingredientView products
Green Tea (EGCG, Polyphenols) · 270 mg OverallScore79
A- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value
Irwin's Performance Fat Burner features standardized EGCG and BioPerine for optimal quality and uptake. It offers full transparency for its caffeine and active marker levels, though like many complex blends, it is priced at a premium.
View ingredientView products
Caffeine (Coffee) · 75 mg OverallScore70
C Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyD- Value
This metabolic and performance formula provides a mild caffeine boost from specified coffee sources alongside herbal adaptogens. While its ingredient transparency is high, the cost per serving is premium and above the collection average.
View ingredientView products
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