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Life Extension vs NOW Foods Green Tea Extract (2026)
Disclosure: We earn commissions on purchases made through our links. This never influences our scores. Editorial policy
The Verdict
Life Extension scores higher on our rubric (84 vs 77 on our 0-100 execution score), helped by its higher polyphenol standardization and per-capsule dose. On cost, Life Extension is actually the better value at about $0.18 per dose versus NOW Foods' $0.24. NOW Foods carries the Best Value badge in our green tea scoring and NPA A-rated GMP manufacturing. In our view Life Extension is the stronger overall pick here on both score and cost; NOW Foods is a fine, well-tested alternative. Both disclose their EGCG standardization.
Mega Green Tea Extract, Lightly Caffeinated
Life Extension
EGCg Green Tea Extract 400mg Veg Capsules
NOW Foods
Head-to-Head Comparison
| Category | Mega Green Tea Extract, Lightly Caffeinated Life Extension | EGCg Green Tea Extract 400mg Veg Capsules NOW Foods |
|---|---|---|
| Brand Score | 84/100Winner | 77/100 |
| Dosing & Form | 25/25Winner | 22/25 |
| Purity | 13/25Winner | 13/25 |
| Value | 23/25Winner | 19/25 |
| Transparency | 23/25Winner | 23/25 |
| Cost/Day | $0.18Winner | $0.24 |
| Dose/Serving | 725mg | 400mg |
| Form | Green tea extract (standardized to 98% polyphenols, 45% EGCG) | Green tea extract (standardized to 80% catechins, 50% EGCG) |
| Third-Party Tested | No | No |
| Proprietary Blend | No | No |
Why This Comparison Matters
Life Extension and NOW Foods both make a standardized green tea extract focused on EGCG, the catechin behind most of green tea's studied benefits. Life Extension's Mega Green Tea Extract is standardized to 98% polyphenols and 45% EGCG at a higher per-capsule dose; NOW Foods standardizes to 50% EGCG at 400mg. This is a standardization-and-value matchup between two trusted brands.
With green tea extract, the standardization percentage and EGCG content matter more than the raw milligrams, since EGCG is the active fraction. Both disclose their standardization, which puts them ahead of the many products that do not.
We scored both on evidence, quality, cost per dose, and transparency.
Detailed Score Breakdown
Mega Green Tea Extract, Lightly Caffeinated
Life Extension
725mg extract standardized to 45% EGCG (326mg EGCG) - within the clinically effective range
GMP certified, Non-GMO LE Certified, but no independent third-party testing (USP/NSF)
$0.18/day - excellent value for a well-standardized EGCG extract
Full disclosure of polyphenol (98%) and EGCG (45%) standardization percentages
Highly concentrated EGCG dose with transparent standardization at an excellent price point
EGCg Green Tea Extract 400mg Veg Capsules
NOW Foods
400mg extract standardized to 50% EGCG (200mg EGCG) - requires 2 capsules for upper clinical range
NPA A-rated GMP facility, but no independent third-party testing for this specific product
$0.24/day after a price rise - still among the most affordable well-standardized EGCG extracts from a major brand
Clear standardization yielding a predictable 200mg EGCG per capsule
Includes decaffeinated green tea leaf for full-spectrum support alongside the standardized EGCG
How We Compared These Products
Every product in our database is scored on four equally-weighted pillars: dosing accuracy and form quality, purity verification (third-party testing), cost per clinically effective dose (not cost per pill), and label transparency. Each pillar is worth 25 points for a total of 100.
Cost per effective dose is calculated using the clinically studied dose from published research, not the manufacturer's suggested serving. If a product requires multiple servings to reach the dose used in clinical trials, that cost is reflected in the value score.
For a full explanation of our scoring methodology, see our methodology page. Prices were last checked on the dates listed for each product and may have changed.
More Green Tea Extract (EGCG) Comparisons
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FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.