Silvets Review 2026What Is Inside, and Who It Suits

What is in it, per 2 capsules (from the label published by the retailer NuviaLab; the page our link leads to shows none): guarana 400 mg (about 88 mg caffeine), green tea extract 240 mg (about 108 mg EGCG), acai 200 mg, L-carnitine 120 mg, cayenne 12 mg, black pepper extract 12 mg, vitamin D 10 mcg and chromium 40 mcg.

What the evidence says: a Cochrane review found green tea's effect on weight outside Japan "small, statistically non-significant" and "not likely to be clinically important". The other ingredients are at a small fraction of the doses tested.

Before you order: the sales page says "without any side effects", but the label warns against use with heart disease or other caffeine. There is no money-back guarantee in the terms, only a 10-day window from purchase for unopened goods.

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

• Caffeine (from guarana): about 88 mg. The bottle states about 80 mg. That is well under the FDA's 400 mg a day reference for adults, but it adds to coffee, tea and energy drinks.
• EGCG: about 108 mg vs 270 mg a day in the study the page cites, about 40%, and that study did not measure weight.
• L-carnitine: 120 mg vs about 2,000 mg a day. About 6%.
• Chromium: 40 mcg vs 200 to 1,000 mcg. A fifth of the lowest trial dose.
• Capsaicin: about 0.24 mg. Far below the "high doses" where effects appeared.

The label says two capsules a day, about 30 minutes before a meal, with 300 ml of water. A bottle of 60 lasts a month.

The sales pages call them "tablets" with "6 active ingredients"; the label shows capsules with 8.

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

• Label with doses: yes, but not where you buy. The full label is on the NuviaLab store, not on the silvets.de page our link leads to.
• Identifiable company: no. The German site names Key Player Limited, Dubai Airport Freezone. The English terms still contain an unfilled template placeholder, "{%SHOP_NAME%}", instead of a company name.
• Refund terms in writing: yes. 10 calendar days from purchase, unused goods only.
• Independent testing shown: no.
• Study on the finished product: no.

Other inconsistencies: the German order page carries a banner for a different product ("Nonacne"), and the testimonials are labelled in Polish ("Przed/Po", before/after).

Correction. An earlier version of this review described UK manufacture, GMP certification, a 90-day guarantee, no published label and glucomannan in the formula, and cited Garcinia and CLA studies. None of this matches the product, and we have corrected it.

Prices when we checked in September 2026:

• German site (where our link leads): €49 for 1 bottle, €98 for 3, €147 for 6, plus a payment charge of €6 by card or €14 cash on delivery.
• US site: $59 for 1 bottle, $118 for 3, $177 for 6, plus $12.
• NuviaLab store: $44.99 for 1 bottle.

That is about €0.82 to €1.63 a day before the payment charge.

The return rule. The order page shows a "money-back guarantee" with no time limit, but the terms allow withdrawal only "within 10 calendar days from the date of purchase", in writing, for goods with no signs of use. The terms also state that EU law does not apply. Once you open a bottle, there is no refund route in the terms.

• Caffeine effects: jitteriness, poor sleep, a racing heart, especially with coffee or energy drinks. The FDA uses 400 mg a day as the level not generally linked to negative effects in adults.
• Liver: the NCCIH notes rare liver injury, mainly with green tea extracts in capsules.
• Drug interactions: black pepper extract (piperine) can raise blood levels of some medicines.

The sales page says Silvets has no side effects at all. Its own label warns against use with heart disease or other caffeine.