Member XXL Review 2026An Honest Look at the Label

What is in it, per 2 capsules: L-arginine HCl 200 mg, fenugreek 200 mg, saw palmetto 200 mg, tribulus 150 mg, schisandra 100 mg, Korean ginseng 100 mg, saffron 40 mg, black pepper extract, vitamin E, vitamin B6 and zinc.

What we found:

• No pill has been shown to enlarge the penis. A Cleveland Clinic urologist says of these products: "there's no evidence they work". The "90 men, +5 cm" study on the sales page is not published anywhere we could find.
• The ingredients with erection research are far below the studied doses: arginine about 4 to 13%, tribulus 10%.
• Saffron failed in the largest trial (346 men), and a Cochrane review found ginseng's effect "trivial".

Returns are limited to 10 days from purchase, for unopened goods.

Our Dose Check compares each label amount with the best human study.

• L-arginine: about 165 mg vs 1,500 to 5,000 mg a day. About 4 to 13%.
• Tribulus: 150 mg vs 1,500 mg a day for 12 weeks. 10%.
• Fenugreek: 200 mg vs 600 mg a day of a different extract. 33%.
• Saffron: 40 mg vs 60 mg a day, which did not work.
• Ginseng: 100 mg, unstandardised; the Cochrane trials found only a trivial effect.
• Penis size: no trial of any oral supplement to compare with.

The label says 2 capsules a day (1 twice a day), about 30 minutes before a meal, with 300 ml of water. A bottle of 60 lasts a month.

Our Transparency Score checks five things a buyer can verify. Member XXL scores 2 out of 5.

• Label with doses: yes, with errors. The zinc and vitamin B6 amounts are swapped between the two published labels, and the black pepper amount differs (5 mg vs 2 mg).
• Identifiable company: no. The Swiss site names Key Player Limited, Dubai Airport Freezone; the English site names only "MemberXXL.com" in Hong Kong. The brand is a NuviaLab trademark. No manufacturer is named.
• Refund terms in writing: yes. 10 calendar days from purchase, unused goods only.
• Independent testing shown: no. The label says only "Country of origin: European Union"; there is no GMP claim.
• Study on the finished product: no. The sales page describes a 12-week study of 90 men with an average gain of 5 cm, with no author, journal or registration. The US page says up to 9 cm, the Swiss page up to 8 cm.

Correction. An earlier version of this review scored Member XXL 8.6/10 and recommended it, said no amounts were published, listed citrulline and maca, and described GMP manufacture, a $47 price, free shipping and a 90-day guarantee. None of this was correct, and we have corrected it.

Prices when we checked in September 2026:

• Swiss site (where our link leads, in German): CHF 59.99 for 1 bottle, CHF 119.98 for 3, CHF 179.97 for 6, plus shipping.
• US site and NuviaLab: $59.99, $119.98, $179.97. UK: £39.99, £79.98, £119.97.

The return rule. The terms 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. The US page shows a "Satisfaction Reliable" block with no terms. The sales page suggests three months of use, well outside the 10-day window. On Trustpilot, NuviaLab scores 1.9 out of 5 (148 reviews), including a Member XXL buyer whose refund request after three months was declined.

• Hidden drugs in this category: the FDA warns that male enhancement supplements are "likely to be contaminated with dangerous hidden ingredients" and are "not guaranteed to work". Member XXL is not on the FDA's list.
• Arginine: in the meta-analysis, side effects were more common with arginine (8.3% vs 2.3%), none severe.
• Ginseng might lower blood sugar and may interfere with blood clotting, according to the NCCIH.

The sales page says its use "does not cause side effects". There is no clinical study on Member XXL itself.