Green Coffee 5K Review 2026Pros, Cons and Real Feedback

The "5000 mg" explained: the bottle holds 250 mg of a 20:1 extract, which the seller says is "equivalent to 5000 mg" of whole beans. It provides 50 mg of chlorogenic acid, the compound linked to green coffee's supposed effect. The seller's pages disagree on whether that is per capsule or per two-capsule serving.

The evidence: the study that launched the green coffee craze was retracted, and in 2014 the US Federal Trade Commission settled with the extract's marketer for $3.5 million over claims based on it. Later meta-analyses found about 1.3 to 2.5 kg of extra weight loss in a handful of small trials judged at high risk of bias, using 500 mg or more of chlorogenic acid a day, five to ten times this product's dose.

The refund catch: the sales page advertises a 90-day money-back guarantee, but the binding terms on the same site allow only 10 days from purchase, for unused goods.

Our Dose Check compares the label with the dose in the best human evidence.

• Chlorogenic acid: 50 mg per serving according to NuviaLab's label, or up to 100 mg a day by the sales page's per-capsule figure, vs 500 mg a day or more in the trials that found about 1.3 kg of weight loss. 10% to 20% of the studied dose.
• Green coffee extract: 250 mg of a 20:1 extract. The "5000 mg" is the raw-bean equivalent, not the amount of extract.
• Caffeine: not stated.

NuviaLab's directions are two capsules a day, about 30 minutes before a meal, with 300 ml of water; the German sales page gives no directions. A bottle of 60 lasts a month at two a day.

Our Transparency Score checks five things a buyer can verify. Green Coffee 5K scores 2 out of 5.

• Label with doses: yes, but thin and inconsistent. Extract and chlorogenic acid amounts are stated; whether they are per capsule or per serving differs between pages, and caffeine is not quantified.
• Identifiable company: no. The German site names Key Player Limited, Dubai Airport Freezone; the English terms contain an unfilled "{%SHOP_NAME%}" placeholder.
• Refund terms in writing: yes. 10 calendar days from purchase, unused goods only, despite the 90-day banner.
• Independent testing shown: no.
• Study on the finished product: no.

Claims that do not hold up: the page says it is "the only product on the market" with up to 5,000 mg of green coffee extract (it contains 250 mg), that you will not find "any other supplement" with green coffee extract, and that you can lose weight without dieting or exercise.

Correction. An earlier version of this review said no amounts were published, described EGCG and glucomannan (not in the product), cited Garcinia and CLA studies, and listed a $64 price and free shipping. We have corrected it.

Prices when we checked in September 2026:

• German site (where our link leads): €39.99 for 1 bottle, €79.98 for 3, €119.97 for 6, plus €6 by card or PayPal, or €14 cash on delivery.
• English site and NuviaLab: $44.99 for 1 bottle, $89.98 for 3, $134.97 for 6, plus $12.

That is about €1.33 a day for one bottle before the charge.

90 days or 10 days? The sales page promises that the product "can be returned within 90 days". The terms on the same site allow withdrawal only "within 10 calendar days from the date of purchase", in writing, for goods with no signs of use, and state that EU law does not apply. A buyer relying on the 90-day promise could be refused after day 10.

• Caffeine effects such as jitteriness or poor sleep are possible; the caffeine content is not disclosed.

The sales page says the capsules cause no side effects such as anxiety or stress. There is no clinical study on Green Coffee 5K itself.