Life Extension Decaffeinated Mega Green Tea Extract – Polyphenol-Rich, Cell Health, Heart Health, Brain Health, Antioxidant Protection – Non-GMO, Gluten-Free, Vegetarian – 100 Capsules
$0.22/serving
Price verified Apr 22, 2026
Not evaluated by the FDA · Individual results may vary · Consult a healthcare provider before use
Our verdict
725mg green tea extract (326mg EGCg) per capsule of Decaffeinated Green Tea Extract (standardized to 98% Polyphenols, 45% EGCg) per capsule from Life Extension. Best for best high-dose decaffeinated green…
Why we recommend this
Delivers a potent 326mg EGCG per capsule from a 98% polyphenol standardized extract — one of the highest concentrations available. Decaffeinated, making it suitable for caffeine-sensitive individuals and evening dosing. Life Extension is a research-driven brand with rigorous quality standards. Single capsule provides a near-clinical dose.
Check for interactions
Already taking other supplements or prescription medications? Add them below to check for documented interactions, severity, and clinical guidance.
Our database currently documents 137+ supplement and drug-category interaction pairs. Combinations not flagged here may still interact — always consult your healthcare provider before combining supplements, especially with prescription medications.
What to watch out for
Higher price than NOW Foods. Very high polyphenol concentration may cause GI discomfort in sensitive individuals. Take with food to reduce nausea. Decaffeination process may slightly alter catechin profile.
Dose & form
- Serving
- 725mg green tea extract (326mg EGCg) per capsule
- Form
- Capsule
- Clinical range
- 250-500mg EGCG daily (from 400-800mg GTE)
- Dose adequacy
- Full
- Supply
- 100 servings · $0.22/serving
- UPC
- 737870954101
Who it's best for
Best high-dose decaffeinated green tea extract
Who should skip it
Those wanting a lower dose or a caffeinated version for energy.
Pros
- 326mg EGCg per capsule (highest per-cap dose)
- 98% polyphenol standardization
- Decaffeinated (caffeine-free)
- Research-driven brand
Cons
- Higher price ($0.22/serving)
- May cause GI discomfort on empty stomach
- High concentration — start with one capsule
- Decaf process may alter catechin ratio
What customers say
4.4★ across 1,657 Amazon reviews. The most common questions from shoppers: life extension mega green tea extract safe, product decaffeinated, and high-dose green tea extract affect the liver. Full answers in the FAQ below.
Frequently Asked Questions
What is the clinical dose for Decaffeinated Green Tea Extract (standardized to 98% Polyphenols, 45% EGCg)?
What is the clinical dose for Decaffeinated Green Tea Extract (standardized to 98% Polyphenols, 45% EGCg)?
Clinical trials typically use 250-500mg EGCG daily (from 400-800mg GTE). Life Extension Mega Green Tea Extract (Decaffeinated) delivers 725mg green tea extract (326mg EGCg) per capsule, which we classify as Full relative to that range.
How does Life Extension Mega Green Tea Extract (Decaffeinated) compare to similar Capsule?
How does Life Extension Mega Green Tea Extract (Decaffeinated) compare to similar Capsule?
See the "Also consider" section below for two alternatives. Choose based on form preference (Capsule vs alternatives), dose adequacy, and third-party testing.
Is Life Extension Mega Green Tea Extract (Decaffeinated) third-party tested?
Is Life Extension Mega Green Tea Extract (Decaffeinated) third-party tested?
Yes — Third-Party Tested. Third-party testing verifies ingredient identity and label accuracy.
Does this work with Amazon Subscribe & Save?
Does this work with Amazon Subscribe & Save?
Yes — Amazon Subscribe & Save is available for this product. Enrolling locks in a recurring delivery at a reduced per-unit price.
Is Life Extension Mega Green Tea Extract safe?
Is Life Extension Mega Green Tea Extract safe?
Yes, Life Extension Mega Green Tea Extract is safe when taken as directed with food. It provides 326mg EGCG per capsule, which is within the EFSA's recommended limit of 800mg EGCG daily. It is decaffeinated, making it safer for caffeine-sensitive individuals.
Is this product decaffeinated?
Is this product decaffeinated?
Yes, Life Extension Mega Green Tea Extract is decaffeinated, with 95%+ of caffeine removed while preserving catechin content. This makes it suitable for caffeine-sensitive individuals, evening dosing, and those who consume caffeine from other sources.
Can high-dose green tea extract affect the liver?
Can high-dose green tea extract affect the liver?
Very high doses of EGCG on an empty stomach have been linked to rare liver injury cases. Life Extension's 326mg EGCG per capsule is within safe limits when taken with food. Do not take on an empty stomach and do not exceed 2 capsules daily.
Are there side effects from Mega Green Tea Extract?
Are there side effects from Mega Green Tea Extract?
The high polyphenol concentration (98%) may cause nausea or GI discomfort in sensitive individuals, especially on an empty stomach. Start with 1 capsule with food and assess tolerance before considering 2 capsules. Most people tolerate it well.
Is Life Extension a trustworthy brand?
Is Life Extension a trustworthy brand?
Yes, Life Extension is a research-focused brand with over 40 years in the industry. They fund independent research, publish in peer-reviewed journals, and third-party test all products. Their formulations are known for being science-driven and high-potency.
What is the recommended dose?
What is the recommended dose?
The recommended serving is 1 capsule daily with food. Each capsule provides 725mg of extract with 326mg EGCG. One capsule delivers a near-clinical dose. Do not exceed 2 capsules daily (652mg EGCG) to stay within EFSA guidelines.
Also consider
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