Green Select Phytosome (Green Tea Extract)

Green Select Phytosome is a phospholipid-bound green tea extract containing EGCG (epigallocatechin gallate) with enhanced bioavailability. It primarily works by inhibiting catechol-O-methyltransferase (COMT) enzyme, increasing fat oxidation and metabolic rate.

Origin & History

GreenSelect Phytosome is a proprietary, decaffeinated green tea extract derived from Camellia sinensis leaves, formulated using Indena's Phytosome technology. This technology complexes the extract with phospholipids from sunflower or lecithin to enhance absorption of catechins that are typically poorly soluble in water and lipids. The extraction yields a highly standardized product containing ≥19-25% total polyphenols and ≥13% EGCG with ≤0.1% caffeine.

Historical & Cultural Context

While green tea (Camellia sinensis) has been used in Traditional Chinese Medicine for over 2,000 years to aid digestion, promote longevity, and provide antioxidant benefits, GreenSelect Phytosome itself is a modern proprietary formulation without direct historical precedent. The Phytosome technology represents a contemporary advancement in botanical extract delivery.

Health Benefits

• Metabolic syndrome support: In a 24-week registry study (n=50), 68% of treated participants shifted out of borderline metabolic syndrome status vs 20% in controls (Moderate evidence, PMID: 24299907)
• Weight management: Clinical research demonstrated sustained benefits in body weight maintenance post-weight loss (Moderate evidence, PMID: 27550991)
• Oxidative stress reduction: The same 24-week study showed significant improvements in oxidative stress markers in borderline metabolic syndrome subjects (Moderate evidence, PMID: 24299907)
• Cardiovascular health: Participants experienced significant improvements in blood pressure and blood lipids over 24 weeks (Moderate evidence, PMID: 24299907)
• Enhanced antioxidant capacity: Manufacturer claims cite superior antioxidant effects versus unformulated green tea, though full RCT details not available (Preliminary evidence)

How It Works

Green Select Phytosome delivers EGCG through phospholipid complexation, increasing absorption up to 3-fold compared to standard green tea extracts. EGCG inhibits catechol-O-methyltransferase (COMT), prolonging norepinephrine activity and enhancing thermogenesis. The compound also activates AMPK pathways and inhibits fatty acid synthase, promoting fat oxidation and metabolic efficiency.

Scientific Research

A single-blind, controlled registry study (n=50, PMID: 24299907) tested GreenSelect Phytosome at 250-500 mg/day for 24 weeks in subjects with borderline metabolic syndrome, showing significant improvements in weight, blood lipids, blood pressure, and oxidative stress markers. Another study (PMID: 27550991) evaluated its effectiveness for weight maintenance post-weight loss, demonstrating sustained metabolic benefits. While manufacturer claims cite additional human trials, full RCT or meta-analysis details are not available in the research dossier.

Clinical Summary

A 24-week registry study (n=50) showed 68% of participants treated with Green Select Phytosome shifted out of borderline metabolic syndrome status versus 20% in controls. Clinical research demonstrates sustained benefits in body weight maintenance, though specific weight loss data requires larger controlled trials. The phytosome formulation shows superior bioavailability compared to standard green tea extracts, with evidence suggesting moderate strength for metabolic syndrome support.

Nutritional Profile

Green Select Phytosome is a standardized green tea extract (Camellia sinensis) complexed with phosphatidylcholine (from soy lecithin) in a 2:1 ratio (phosphatidylcholine:green tea extract) to enhance bioavailability. Key bioactive compounds include: Epigallocatechin gallate (EGCG): primary catechin, standardized to approximately 45-50% total catechins by weight; total catechins typically 60-75% of extract weight, including epicatechin (EC), epigallocatechin (EGC), and epicatechin gallate (ECG). Caffeine content is reduced or absent depending on the specific formulation variant (decaffeinated versions contain <0.5% caffeine). The phytosome complex incorporates phosphatidylcholine at approximately 40% by weight of the final complex, which forms a lipid-compatible molecular complex with catechin polyphenols. Bioavailability notes: The phosphatidylcholine complexation increases oral bioavailability of EGCG by approximately 1.3-3.5-fold compared to unformulated green tea extract, as demonstrated in pharmacokinetic studies, due to improved intestinal absorption across lipid membranes. Typical clinical doses used in studies range from 300-450 mg of the phytosome complex per day. No meaningful macronutrient (protein, fat, carbohydrate) or micronutrient (vitamins, minerals) content at supplemental doses. Fiber content is negligible. The primary nutritional contribution is entirely via bioactive polyphenol catechins, particularly EGCG, which acts on metabolic and antioxidant pathways.

Preparation & Dosage

Clinically studied doses range from 250 mg taken 2-3 times daily (total 500-750 mg/day), standardized to ≥19-25% total polyphenols and ≥13% EGCG. The 24-week registry study used 250-500 mg/day in coated tablet form. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Berberine, chromium picolinate, alpha-lipoic acid, conjugated linoleic acid (CLA), gymnema sylvestre

Safety & Interactions

Green Select Phytosome is generally well-tolerated with minimal side effects reported in clinical studies. Potential interactions may occur with blood thinners due to green tea's vitamin K content and with iron absorption. Individuals with caffeine sensitivity should exercise caution, though phytosome forms typically contain lower caffeine levels. Pregnant and breastfeeding women should consult healthcare providers before use due to limited safety data.