Piperinox Review 2026What Is Inside, and Who It Suits

What is in it: black pepper extract, cinnamon, bitter orange, ginger, cayenne, chromium and guarana. No amounts are published in the product text in any of the six markets we checked, and the panel in the product photo is too small to read.

What the evidence says, in one line each:

• Bitter orange (synephrine) raised blood pressure in a meta-analysis and did not produce significant weight loss.
• Chromium gave about 1 kg of extra loss in a Cochrane review, which the authors called of debatable clinical relevance.
• Black pepper extract has no human weight-loss trial of its own, and it can raise blood levels of some medicines.

Before you order: there is no money-back guarantee, only a 10-day window from purchase for unused goods. The seller is Key Player Limited in Dubai, or "Piperinox.com, Hong Kong" on the English site.

Our Dose Check compares the label with the dose in the best human study. For Piperinox, every dose is unknown.

• Chromium: not disclosed vs 200 to 1,000 mcg a day. Unknown.
• Bitter orange, cinnamon, ginger, cayenne, guarana: not disclosed. Unknown; the box states 730 mg per capsule for all seven together.
• Black pepper extract: not disclosed. In a Norwegian food-safety assessment, 1.5 mg a day of piperine from supplements was judged unlikely to cause harm; Piperinox does not say whether it stays near that.

The directions are one capsule a day between meals with about 300 ml of water. A bottle of 30 capsules lasts one month.

The page claims the European Food Safety Authority "confirmed" BioPerine's safety. EFSA's opinion concerns piperine as a food flavouring, not as a weight-loss supplement at an undisclosed dose.

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

• Label with doses: no. Ingredient names only; the panel in the photo is illegible.
• Identifiable company: partly. The German site names Key Player Limited, Dubai Airport Freezone. The English site gives only "Piperinox.com, Stanley Street, Hong Kong".
• Refund terms in writing: yes. 10 calendar days from purchase, unused goods only.
• Independent testing shown: no. No lab, manufacturer, country of manufacture or GMP claim.
• Study on the finished product: no. The only study is of an empty capsule shell.

The "expert opinion" on the sales page sits beside a stock doctor image with no name or credentials, and the FAQ calls the product "completely safe" despite two stimulants.

Correction. An earlier version of this review listed green tea, glucomannan and L-carnitine as ingredients and described EU manufacture, GMP certification and a 90-day guarantee. None of these appears in the seller's own information, and we have corrected it.

Prices when we checked in September 2026:

• English site: $49.99 for 1 bottle, $99.98 for 3, $149.97 for 6.
• German site: €49 for 1 bottle, €98 for 3, €147 for 6 (€24.50 each).

That is about €1.63 a day for one bottle, or €0.82 a day in the six-pack.

The return rule is the catch. The terms allow you to withdraw "within 10 calendar days from the date of purchase", with written notice first, and only if the goods show no signs of use. There is no satisfaction guarantee. The terms also say EU law does not apply and name UAE or Hong Kong law, depending on the site. The seller can refuse refunds if it believes an order was for resale.

With that return policy, a six-bottle bundle is a six-month commitment made before you have opened the first bottle.

• Blood pressure and heart rate: synephrine from bitter orange raised blood pressure in trials, and the NCCIH notes reports of abnormal heart rhythms, heart attacks and strokes in people taking bitter orange products, mostly in combination with other stimulants.
• Caffeine effects from guarana: jitteriness, poor sleep, a racing heart.
• Drug interactions: piperine inhibits CYP3A4, an enzyme that clears many common medicines. Ask a pharmacist if you take any regular medication.
• Stomach upset from cayenne and ginger in sensitive people.

There is no clinical study on Piperinox itself.