NutraBio's Green Tea Extract is an honest, well-made mid-list pick from a brand that built its reputation on full-disclosure labeling. The standardization is clean — 95% polyphenols / 75% catechins / 45% EGCG, about 225 mg of EGCG per capsule — the dose is sensible and easy to take safely with food, and the made-in-USA GMP production is reassuring. It ranks #5 mainly on supply and reach: the 90-count bottle is smaller than the value leaders, and the caffeine is naturally-occurring rather than spotlighted on the front label. If you value a transparent label and a sane EGCG dose over a big bottle, it's an easy, trustworthy choice — and, like every pick here, a modest fat-loss adjunct on top of a deficit, not a fat burner.
Check on AmazonAffiliate link — Super Achiever Club earns a small commission at no extra cost to you.
500 mg extract at 95% polyphenols / 75% catechins / 45% EGCG delivers ~225 mg of EGCG — a clean, well-standardized, sensible dose with the numbers fully disclosed. Solid and honest, just a moderate rather than maximal amount.
NutraBio's strength: a full-disclosure label with no proprietary blends, made in the USA under GMP. The transparent labeling is exactly the trust signal this category lacks, scoring it well on purity even against bigger names.
The ~225 mg EGCG dose is sensible to take with food, but the caffeine is naturally-occurring rather than headlined on the front label — a small transparency gap versus the picks that state a caffeine number. Solid, not best-in-class on this axis.
A 90-count bottle at a fair price gives a solid cost per active mg — good value for a transparent, made-in-USA product, though the smaller count means it isn't the cheapest per mg like the 180-/200-count value extracts.
“500 mg green tea extract at 95% polyphenols / 75% catechins / 45% EGCG (~225 mg EGCG).”
The listing states a 500 mg green tea extract standardized to 95% polyphenols, 75% catechins, and 45% EGCG, computing to ~225 mg of EGCG per capsule. Fully disclosed and holds up as stated.
“Full-disclosure label, no proprietary blends.”
Consistent with NutraBio's brand reputation and the listing's complete standardization breakdown. The no-proprietary-blend, transparent-label positioning is accurate and a genuine differentiator.
“Made in the USA under GMP.”
The listing states made-in-USA, GMP-produced manufacturing, consistent with NutraBio's established production. Accurate as stated.
“Adds antioxidant benefits and helps overall health and well-being.”
Directionally accurate — catechins are antioxidants — but a broad wellness claim, not a proven product-specific outcome. Reasonable as a category statement; the weight effect specifically is modest (Hursel 2009).
NutraBio built its name on transparent labeling with no proprietary blends, and this product reflects that: you see the exact standardization — 95% polyphenols, 75% catechins, 45% EGCG — rather than a vague 'green tea extract' line. In a category where honesty varies widely, that traceability is a real trust signal and the core of its 'best standardized value' case.
At ~225 mg of EGCG per capsule, this is a moderate, well-judged dose — comparable to NOW's ~200 mg and easy to take with food without any special dosing rules. It's the kind of sane amount that fits most people and stays comfortably below the EFSA liver-safety ceiling.
Unlike Zhou or Life Extension, NutraBio doesn't headline its caffeine number on the front panel — it's naturally-occurring and you read it off the label. That's a minor gap for a brand otherwise defined by disclosure, and the reason it scores a touch lower on the safety-and-caffeine-clarity axis than the picks that state a caffeine figure.
The 90-count bottle is a smaller supply than the 180- or 200-count value extracts, so the cost per active mg isn't rock-bottom. It's fair value for a transparent, made-in-USA GMP product — you're paying for the label honesty — but if pure cost per mg is the goal, a big-count budget extract wins.
NutraBio's Green Tea Extract is an honest, well-made mid-list pick from a brand that built its reputation on full-disclosure labeling. The standardization is clean (95% polyphenols / 75% catechins / 45% EGCG, about 225 mg of EGCG per capsule), the dose is sensible and easy to take safely with food, and the made-in-USA GMP production is reassuring. It ranks #5 mainly on supply and reach — the 90-count bottle is smaller than the value leaders, and the caffeine is naturally-occurring rather than spotlighted on the front label. If you value a transparent label and a sane EGCG dose over a big bottle, it's an easy, trustworthy choice — a modest adjunct on top of a calorie deficit, taken with food.
Check NutraBio · 500 mg extract, 95% polyphenols / 75% catechins / 45% EGCG (~225 mg EGCG) · 90 ct on AmazonThe overall winner — a comparable ~200 mg EGCG dose with very low, stated caffeine, top-tier QC, and a 180-count bottle. Choose it if you want the same sane dose with stated caffeine and more supply.
See it on the list →A clean ~250 mg EGCG dose with caffeine explicitly stated (~15 mg), 120-count. Choose it if you want a stated caffeine number.
See it on the list →A gentle, water-extracted budget option from a respected brand — a lower, milder dose that's hard to overdo. Choose it if you want a soft entry point.
See it on the list →Meta-analysis of 11 studies: green tea catechins were associated with a modest ~1.3 kg mean weight change, clearest with caffeine. Keeps NutraBio's wellness framing in honest perspective — a small adjunctive effect.
Systematic review: liver-related adverse effects were associated with high-dose extract taken fasted. Supports taking NutraBio's ~225 mg EGCG dose with food.
Systematic review of RCTs: liver-enzyme elevations clustered at higher EGCG doses — reinforcing that NutraBio's moderate ~225 mg dose is a sensible, lower-risk amount.
