The short verdict
Crave Burner does one thing better than almost every competitor we’ve reviewed: it publishes the full dose of every ingredient. That transparency is real and rare. But when you check those doses against the research, the picture is uneven — one ingredient is delivered in a form that cannot produce the effect it’s famous for, two carry more risk than proven benefit, and the headline promise on the sales page is not supported by evidence we could find.
Best for: someone who wants a fiber-based satiety aid alongside a calorie deficit and who has no blood-pressure or liver concerns. Not for: anyone expecting the advertised “500 extra calories a day,” or anyone on blood-pressure or diabetes medication.
What Crave Burner is
Crave Burner is an appetite-suppressant supplement sold by NuviaLab. The pitch is straightforward: take three capsules, feel fuller, want sugar less, and eat less as a result. It is not a stimulant fat-burner in the classic sense — there’s no caffeine in the formula — and it is not a GLP-1 drug or a substitute for one.
One serving is three capsules. A pack holds 90 capsules, which is 30 servings, or one month. It’s manufactured in the European Union.
The label, in full
This is the entire active formula, exactly as the manufacturer publishes it. We’re reproducing it in full because most reviews of this product don’t — and because the doses are the whole story here.
| Ingredient | Per serving (3 caps) | Standardization |
|---|---|---|
| Carolean™ — prickly pear fruit extract + carob seed extract | 1000 mg | — |
| GS4 PLUS® — Gymnema sylvestre leaf extract | 400 mg | 25% gymnemic acids |
| Cinnamon bark extract | 100 mg | — |
| Garcinia cambogia fruit extract | 100 mg | 60% HCA |
| Bitter orange extract | 100 mg | 6% synephrine |
| BioPerine® — black pepper fruit extract | 2 mg | 95% piperine |
| Chromium | 100 µg | — |
Credit where it’s due. Of the four NuviaLab formulas we’ve now examined, this is the only one that discloses a dose for every single active. Proprietary blends that hide amounts behind a total weight are the norm in this category. Crave Burner doesn’t do that, and that alone puts it ahead of most of the shelf.
Ingredient by ingredient: does the dose match the research?
Carolean™ (prickly pear + carob) — 1000 mg
The mechanism is believable. Both prickly pear (Opuntia ficus-indica) and carob seed are sources of viscous soluble fiber, and soluble fiber genuinely does slow gastric emptying and blunt appetite. This is the part of the formula most likely to produce something you can feel.
Two caveats. First, Carolean™ is a proprietary blend: the manufacturer publishes the combined 1000 mg but not how it splits between the two plants, so you cannot check either against its own literature. Second, clinical work on Opuntia and body weight has produced modest and inconsistent results, and 1000 mg is a small amount of fiber — a single apple carries more.
GS4 PLUS® Gymnema sylvestre — 400 mg at 25% gymnemic acids
Gymnema — gurmar, “the sugar destroyer” — earned its reputation from a specific and genuinely striking effect: gymnemic acids bind to the sweet-taste receptors on your tongue and temporarily switch them off. Eat something sugary afterwards and it tastes like nothing. That effect is real, and it is the reason Gymnema is marketed for sugar cravings.
But it requires contact with your tongue. The 2025 trial most often cited for gurmar’s craving effect delivered it as a mint — 4 mg of extract dissolved in the mouth — and found a 42% drop in sugar-sweetened drink intake and a 28% drop in sugar cravings versus placebo over 14 days. A swallowed capsule bypasses the taste receptors entirely. Whatever else 400 mg of Gymnema in a capsule does, it cannot do the thing that made the ingredient famous.
What an oral capsule may still do is act systemically on glucose handling — Gymnema has been studied for blood-sugar control that way. That’s a slower, subtler and less certain claim than “kills your sweet tooth,” and it isn’t the one the marketing makes.
Cinnamon bark extract — 100 mg
Meta-analyses of cinnamon report small favorable effects on weight and waist circumference. The trials behind them generally used gram-scale doses — typically one to three grams a day of cinnamon powder. At 100 mg of an unspecified extract, you are an order of magnitude below that, and without a standardization figure there’s no way to reason about potency. Treat it as a rounding error in the formula.
Garcinia cambogia — 100 mg at 60% HCA
Garcinia is the most-hyped and worst-performing ingredient in the weight-loss aisle. A systematic review of twelve randomized trials found a difference of roughly 0.9 kg against placebo — barely significant, and small enough that it could be noise.
The safety side is what concerns us more. The NIH’s LiverTox database rates Garcinia cambogia a likelihood score of B — a likely but rare cause of clinically apparent liver injury. The reported pattern is hepatocellular, typically appearing one to four weeks after starting, and while most cases resolve after stopping, some have progressed to acute liver failure requiring transplant. The absolute risk is low, estimated at under 1 in 10,000. But when an ingredient’s proven benefit is under a kilogram and its downside tail includes liver failure, we don’t think it earns a place in the formula.
Bitter orange extract — 100 mg at 6% synephrine
A 2022 systematic review and meta-analysis of synephrine found no evidence that it facilitates weight loss — a mean difference of 0.6 kg that was not statistically significant, with non-significant effects on body fat too. On the safety side, prolonged use raised systolic blood pressure by around 6.4 mmHg and diastolic by 4.3 mmHg. The authors concluded its use is not recommended.
The doses in that analysis ranged from 6 to 214 mg a day, commonly 25–100 mg. Crave Burner sits at the absolute floor of that range. That is genuinely reassuring on safety — 6 mg is unlikely to move your blood pressure meaningfully. It also means the ingredient is almost certainly doing nothing. If you already have high blood pressure or take a stimulant, it’s still worth knowing it’s in there.
Chromium — 100 µg
A meta-analysis of ten randomized double-blind trials found chromium picolinate produced about 1.1 kg more weight loss than placebo. The authors themselves called the clinical relevance debatable and noted the result leaned heavily on a single trial. Chromium is also studied for carbohydrate cravings specifically, with mixed results. At 100 µg it’s a reasonable, well-tolerated dose — a modest contributor rather than a driver.
BioPerine® — 2 mg at 95% piperine
Piperine improves the bioavailability of certain compounds. It isn’t there to do anything on its own, and 2 mg is the standard dose. No complaints.
Three claims from the sales page, checked
⚠ Who should not take this without talking to a doctor first
- Anyone on blood-pressure medication, or with hypertension or a heart rhythm condition — because of the bitter orange, even at 6 mg.
- Anyone taking diabetes medication or insulin. Gymnema and chromium can both affect blood glucose. Stacking them on top of a glucose-lowering drug is a real interaction, not a theoretical one.
- Anyone with liver disease, or taking a medication with liver warnings — because of the Garcinia.
- Anyone who is pregnant or breastfeeding.
- Anyone whose appetite change is new and unexplained, or who is losing weight without trying. That needs a diagnosis, not a supplement.
Stop and see a doctor if you develop yellowing of the eyes or skin, dark urine, persistent nausea, or right-sided abdominal pain — the presenting signs of liver injury.
Pros and cons
👍 What we liked
- Every dose disclosed — no proprietary-blend hiding, which is genuinely uncommon here
- No caffeine, so it won’t wreck your sleep or stack badly with coffee
- The fiber blend is two-thirds of the formula, so the money goes to the most plausible mechanism
- Chromium and BioPerine are at sensible, standard doses
- Made in the EU, with transparent per-unit pricing
👎 What gave us pause
- The Gymnema is in a capsule, which bypasses the taste-receptor mechanism it’s known for
- Garcinia adds a rare liver-injury signal for under a kilogram of proven benefit
- Bitter orange has no weight-loss evidence at any dose, and none at all at 6 mg
- Cinnamon is roughly ten times below the doses used in trials
- The “500 calories a day” and “no side effects” claims don’t hold up
- No money-back guarantee is published anywhere on the official site
Price
Sold directly by the manufacturer. These are the published prices at the time of writing; check the current figures before ordering, as they change.
On the guarantee: we looked for a money-back or refund policy and could not find one published on the official site. Several third-party pages about this product mention a guarantee. We are not repeating that, because we could not verify it. If a refund window matters to you, confirm it in writing at checkout before you pay.
Our verdict
Crave Burner is a more honest product than its own marketing. The label is fully disclosed, the money is concentrated in the one mechanism most likely to do something, and there’s no caffeine padding it out to feel like it’s working. If you want a fiber-based satiety aid to sit alongside an actual calorie deficit, it is a defensible choice.
What keeps it at 3.4 rather than higher is a gap between what the formula can do and what the page says it does. The star ingredient is delivered in a form that defeats its best-known mechanism. Two ingredients contribute risk without matching evidence, and the formula would be better with both removed. And the headline promise — 500 extra calories a day — is the kind of number that sets up a buyer to feel cheated in week three.
No supplement in this category substitutes for a calorie deficit. The honest version of this product’s value is that it might make the deficit slightly easier to hold. That’s worth something. It isn’t worth what the sales page says it’s worth.
See the official Crave Burner page →
- Ruiz-Moreno C. et al. The Safety and Efficacy of Citrus aurantium (Bitter Orange) Extracts and p-Synephrine: A Systematic Review and Meta-Analysis. Nutrients, 2022;14(19):4019.
- Garcinia Cambogia. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. National Institute of Diabetes and Digestive and Kidney Diseases, NCBI Bookshelf (NBK548087).
- Pittler M.H., Stevinson C., Ernst E. Chromium picolinate for reducing body weight: meta-analysis of randomized trials. Int J Obes Relat Metab Disord, 2003.
- The effect of a 14-day Gymnema sylvestre intervention to reduce sugar intake in people self-identifying with a sweet tooth. Appetite, 2025.
- Onakpoya I. et al. The effect of cactus pear (Opuntia ficus-indica) on body weight and cardiovascular risk factors. Nutrition, 2015.
- Manufacturer’s published composition and pricing, NuviaLab, retrieved August 2026.
Affiliate disclosure: this is an independent review. If you buy through a link on this page we may earn a commission at no extra cost to you. It never changes our rating — as this review should make clear.
Medical disclaimer: this content is for education only and is not medical advice. These statements have not been evaluated by the FDA, and this product is not intended to diagnose, treat, cure or prevent any disease. Talk to a healthcare provider before starting any supplement, particularly if you take medication, are pregnant or breastfeeding, or manage a medical condition.
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