Green Tea Phytosome®: Clinically Proven, Caffeine-Free Support for Weight Management

Feb 24, 2026 Just Glow

Key Takeaways

Green Tea Phytosome® is a caffeine-free green tea extract standardized for effective EGCG delivery.
Phytosome® technology more than doubles catechin bioavailability, improving absorption compared to conventional extracts.
Clinically shown to support weight management, including increased fat oxidation and resting energy expenditure.
Reduces respiratory quotient (RQ), indicating a shift toward greater fat utilization over carbohydrates.
Supports metabolic health markers, including waist circumference, insulin sensitivity, and inflammatory balance.
Effective at lower doses due to enhanced absorption, minimizing caffeine-related side effects.
Clinically studied dosage is 300 mg per day, taken as 150 mg twice daily.
Suitable for caffeine-sensitive individuals, including aging adults and post-menopausal women.

Green Tea Phytosome is a proprietary, caffeine-free green tea extract designed for enhanced catechin absorption through Phytosome® technology. This advanced formulation supports weight management, metabolic health, and antioxidant defense, especially when paired with diet and lifestyle interventions.

Green tea catechins, particularly epigallocatechin-3-O-gallate (EGCG), are linked to increased thermogenesis, fat oxidation, and energy expenditure, making them key ingredients in evidence-based metabolic support.

What Is Green Tea Phytosome?

Greenselect® Phytosome® is a double-standardized green tea catechin extract

Total polyphenols: 19–25%
EGCG: ≥ 13%
Caffeine: ≤ 0.1% (caffeine-free)

The Phytosome® delivery system binds catechins to phospholipids, more than doubling oral bioavailability compared to conventional green tea extracts (Belcaro et al., 2013; Rondanelli et al., 2022). This allows effective EGCG delivery at lower doses while minimizing caffeine-related stimulation.

Key Benefits of Green Tea Phytosome:

Enhanced EGCG absorption for improved metabolic activity
Caffeine-free formula suitable for sensitive populations
Supports fat oxidation and thermogenesis
Clinically validated for weight management

How Green Tea Catechins Support Weight Management and Metabolic Health

Green tea catechins modulate energy metabolism by

Reducing Respiratory Quotient (RQ): Lower RQ indicates increased fat oxidation over carbohydrate utilization.
Increasing Resting Energy Expenditure (REE): Greenselect® Phytosome increased REE by +83.21 kcal/day over 60 days (p=0.009, n=28, Rondanelli et al., 2022).
Improving Macronutrient Oxidation: Fat oxidation increased by +11.04%, while carbohydrate oxidation decreased by -11.04% (p=0.0006).

These mechanisms highlight how Green Tea Phytosome supports energy utilization, fat metabolism, and body composition in overweight and obese adults.

Clinical Evidence: EGCG Bioavailability and Fat Oxidation

Study 1 – Borderline Metabolic Syndrome (Belcaro et al., 2013)

Population	Intervention	Endpoints	Results
50 subjects (49 women, 51 men), age 45–55, asymptomatic with borderline MetS	24-week Greenselect® Phytosome + lifestyle/dietary plan (750–1000 kcal/day deficit, 210 min/week physical activity)	Body weight, BMI, waist circumference, fasting glucose, triglycerides, HDL, plasma free radicals, blood pressure	68% showed improved MetS profile; Control group: 80% maintained baseline MetS; Significant reductions in body weight and cardiovascular risk markers reported

Reference: Belcaro, G. et al. “Greenselect Phytosome for borderline metabolic syndrome.” Evidence-Based Complementary and Alternative Medicine, 2013. PMID: 23431215

Study 2 – Overweight Post-Menopausal Women (Rondanelli et al., 2022)

Population	Duration	Endpoints	Results
28 overweight or Class I obese post-menopausal women	60 days	Primary – RQ, %CHO, %FAT, REE; Secondary – waist circumference, insulin, HOMA index, CRP	RQ: -0.04 [-0.07; -0.02], p=0.009; REE: +83.21 kcal/day [31.33; 135.10], p=0.009; %CHO decrease: -11.04% (p=0.0006); %FAT increase: +11.04% (p=0.0006); Waist circumference: -1.07 cm (p=0.007); Insulin: -1.74 μIU/ml (p=0.009); HOMA index: -0.31 (p=0.02); CRP: -0.14 mg/L (p=0.02)

Reference: Rondanelli, M. et al. “A 60-Day Green Tea Extract Supplementation Counteracts the Dysfunction of Adipose Tissue in Overweight Post-Menopausal and Class I Obese Women.” Nutrients, 2022, 14, 5209.

Recommended Use and Dosage

Dose: 150 mg twice daily (total 300 mg/day)
Form: Light brown powder suitable for nutritional supplements
Compliance: Matches clinically studied dosages for proven metabolic effects

Frequently Asked Questions (FAQs)

What makes Green Tea Phytosome different from standard green tea extract?

Green Tea Phytosome uses Phytosome® technology to improve catechin absorption. It is caffeine-free while maintaining clinically validated EGCG content.

Is Green Tea Phytosome caffeine-free?

Yes, it contains ≤ 0.1% caffeine, suitable for caffeine-sensitive individuals.

Can it support weight management?

Yes. Clinical studies demonstrated increased fat oxidation, reduced RQ, and improved REE, supporting metabolic activity and body composition when combined with diet and exercise.

What is the recommended dosage?

150 mg twice daily, totaling 300 mg/day, aligns with clinical study protocols.

Does it contain EGCG?

Yes, standardized to ≥ 13% EGCG, the primary bioactive catechin linked to thermogenesis, fat oxidation, and metabolic health.

Is it safe for long-term use?

Yes, when used within recommended dosages and combined with a balanced diet.

How does Green Tea Phytosome improve EGCG absorption?

The Phytosome® delivery system binds EGCG to phospholipids, enhancing oral bioavailability more than twofold compared to standard extracts.

Can it support post-menopausal weight management?

Yes, clinical studies specifically show benefits for overweight post-menopausal women, including improved fat oxidation and reduced waist circumference.

Are there additional benefits of Green Tea Phytosome for metabolic health?

Green Tea Phytosome may also support cardiovascular health, insulin sensitivity, and antioxidant defenses, making it a multi-target ingredient for overall metabolic wellness.

How does Green Tea Phytosome compare to standard green tea extract supplements?

Unlike conventional green tea extracts, Green Tea Phytosome uses Phytosome® technology to bind catechins to phospholipids, which more than doubles EGCG absorption. This allows for lower effective doses, better metabolic effects, and minimal caffeine stimulation compared to standard extracts.

Get Started with Green Tea Phytosome

Discover the power of Green Tea Phytosome from Just Glow, a clinically validated, caffeine-free catechin extract designed to support weight management, fat oxidation, and metabolic health. Experience enhanced EGCG absorption and standardized catechin content, delivering trusted results for metabolic wellness.

Take the next step toward better energy utilization, fat metabolism, and overall metabolic support with a science-backed, evidence-based ingredient from Just Glow you can rely on.

In This Blog

Summary

Green Tea Phytosome® is a clinically studied, caffeine-free green tea extract designed to enhance the absorption of catechins, particularly EGCG, through Phytosome® delivery technology. By binding green tea catechins to phospholipids, this formulation more than doubles bioavailability compared to standard green tea extracts, allowing effective metabolic support at lower doses without stimulant effects. Clinical studies show that Green Tea Phytosome supports weight management by increasing fat oxidation, boosting resting energy expenditure, reducing respiratory quotient, and improving markers of metabolic health. When combined with diet and lifestyle interventions, it provides evidence-based support for energy utilization, body composition, and overall metabolic wellness.