The short verdict
CerebroZen is a liquid hearing-support supplement that names eight of its “20+” ingredients and gives a dose for none of them. The ingredient with the most tinnitus research behind it, ginkgo biloba, has not been shown to help tinnitus in the largest review of the evidence. Another, vinpocetine, is an ingredient the FDA does not consider a lawful dietary ingredient and warns can harm a pregnancy. It is also expensive, at $49 to $69 a bottle, and the refund fine print is narrower than the “60-day money-back guarantee” suggests.
Best for: honestly, we struggled to name a reader this is clearly right for. Not for: anyone who is pregnant or could become pregnant, anyone on blood thinners, and anyone with new, one-sided or pulsing tinnitus. Those people need a clinician, not drops.
What CerebroZen is
CerebroZen is sold online as a daily liquid supplement “for hearing support.” You take one full dropper a day, either under the tongue or stirred into water or juice. One bottle is sold as a 30-day supply. The seller is listed as CEREBROZEN Research. The site says the product is made in the United States. Orders go through the BuyGoods checkout.
The marketing leans heavily on tinnitus: the sales video opens with the line “Scientists Discover Brain’s ‘Mute Button’ for Tinnitus Relief.” The product pages themselves use softer wording — “support healthy hearing,” “360 degree hearing support.” The small print carries the standard FDA disclaimer that the product is not intended to diagnose, treat, cure or prevent any disease.
The label: what’s disclosed, and what isn’t
The sales page says CerebroZen contains “over 20 carefully-selected ingredients.” It names eight. It publishes no amount for any of them, and we could not find a Supplement Facts panel anywhere on the official site.
| Ingredient named on the official site | Dose disclosed |
|---|---|
| GABA | Not disclosed |
| Vinpocetine | Not disclosed |
| Lion’s mane powder | Not disclosed |
| Alpha-GPC | Not disclosed |
| Ginkgo biloba | Not disclosed |
| Coenzyme Q10 | Not disclosed |
| Lemon extract | Not disclosed |
| Magnesium citrate | Not disclosed |
| The other 12+ ingredients | Not named |
Why the missing doses matter more than usual here. A full dropper of a liquid supplement usually holds about one milliliter. The ingredients above are studied at doses measured in hundreds of milligrams: ginkgo trials typically use 120–240 mg of extract a day, coenzyme Q10 studies commonly use 100 mg or more, and alpha-GPC is usually studied at several hundred milligrams. Add those together and you are past a gram of material — before you count the other twelve-plus ingredients. That cannot fit into a single milliliter of liquid. Coenzyme Q10 also barely dissolves in water.
So whatever the real amounts are, most of these ingredients must be present at a small fraction of the doses the research used. We can’t tell you how small, because the manufacturer won’t say. That is the core problem with this product.
Ingredient by ingredient: what the research says
Ginkgo biloba
Ginkgo has been tested for tinnitus more than almost any other supplement. A 2022 Cochrane review pooled 12 randomized trials with 1,915 participants. The authors concluded that ginkgo “may have little to no effect” on tinnitus at three to six months compared with placebo, and that the evidence is very uncertain. The American Academy of Otolaryngology’s clinical practice guideline on tinnitus goes further: it tells clinicians not to recommend ginkgo or other dietary supplements for persistent tinnitus.
Ginkgo can also affect blood clotting, which matters if you take a blood thinner.
Vinpocetine
This is the ingredient we’d most want readers to know about. In June 2019 the FDA warned that vinpocetine “may cause a miscarriage or harm fetal development,” and advised pregnant women and women who could become pregnant not to take it. The agency’s position is also that vinpocetine does not meet the definition of a dietary ingredient, because it was investigated as a drug before being sold as a supplement.
We did not find good-quality trials showing that vinpocetine relieves tinnitus. For a product marketed to adults of all ages, including women who could become pregnant, its inclusion without a disclosed dose or a prominent warning is a real concern.
Coenzyme Q10
A small 2007 pilot trial gave CoQ10 to people with chronic tinnitus. Overall it did not help. It only saw improvement in the subgroup whose blood levels of CoQ10 were low to begin with. That is an interesting lead, not evidence that a CoQ10 supplement helps tinnitus in general. It is also a hard ingredient to deliver at a meaningful dose in a liquid drop, because it dissolves poorly in water.
Magnesium citrate
The strongest magnesium study in this area gave military recruits oral magnesium during noise exposure. It found less permanent noise-induced hearing loss in the magnesium group. That is about preventing damage from loud noise, which is a different question from reducing existing tinnitus. It was also done at doses far larger than a liquid drop could carry. Magnesium is well tolerated and inexpensive on its own.
Alpha-GPC, lion’s mane and GABA
Alpha-GPC is a choline source studied for cognition, mostly in older adults with dementia and at doses of hundreds of milligrams a day. Lion’s mane has a small human trial in mild cognitive impairment at gram-scale doses of dried mushroom. We found no tinnitus or hearing trials for either one. GABA is a calming neurotransmitter in the brain, but it is still debated whether GABA taken by mouth crosses into the brain in meaningful amounts at all. We found no trials of oral GABA for tinnitus.
Lemon extract
No hearing claim to check, and nothing to worry about.
Three claims from the sales page, checked
⚠ See a doctor instead of buying a supplement if…
- Your hearing dropped suddenly, in hours or over a few days. Sudden hearing loss is a medical emergency. Treatment works best when it starts early.
- The ringing is in one ear only, or it pulses in time with your heartbeat.
- It comes with dizziness or vertigo, ear pain, discharge, or after a head injury.
- It is new and you don’t know why. An audiologist or ENT can check for treatable causes, including earwax, medication side effects and hearing loss.
Do not take CerebroZen if you are pregnant, could become pregnant or are breastfeeding, because of the vinpocetine. Talk to your doctor first if you take a blood thinner or antiplatelet drug, or have surgery coming up.
Pros and cons
👍 What we liked
- A refund window is published, which many products in this category don’t do
- Free US shipping on every package
- Easy to take: one dropper a day, no pills
- The product pages carry the FDA disclaimer rather than promising a cure outright
👎 What gave us pause
- No dose disclosed for any ingredient, and only 8 of “20+” named
- A one-milliliter daily dose cannot hold research-level amounts of these ingredients
- Contains vinpocetine, which the FDA warns about in pregnancy and says is not a lawful dietary ingredient
- Ginkgo, the best-tested ingredient, may have little to no effect on tinnitus
- $49–$69 a bottle, with a $179 “regular price” anchor nobody actually pays
- The refund fine print is narrower than the headline guarantee
Price
These are the prices on the official order page at the time of writing. They change, so check the current figures before you order. Shipping is free in the US on every package.
If you are going to try it, the two-bottle package is the one we’d pick despite the higher per-bottle price. It keeps your spend at $138 and fits inside the 60-day refund window. The six-bottle package only makes sense if you already know the product works for you, and there’s no good evidence that it will.
Our verdict
We rated CerebroZen 2.3 out of 5. The first reason is disclosure. A supplement that asks $138 to $294 up front should tell you how much of each ingredient you are getting, and this one doesn’t. The format makes that silence worse: a single daily milliliter can’t hold research-level doses of the ingredients it names.
The second reason is the evidence itself. The ingredient with the most tinnitus research has come up short in the best review available. Doctors’ own guideline advises against supplements for this problem. And one ingredient, vinpocetine, carries an FDA warning that should keep a large share of potential buyers away.
If tinnitus is affecting your life, the most useful step is a hearing test with an audiologist. Hearing aids help many people whose tinnitus comes with hearing loss, and cognitive behavioral therapy has the strongest evidence for making tinnitus less distressing. If you still want to try CerebroZen, start with the smallest package, check the refund terms in writing, and skip it entirely if you could be pregnant.
See the official CerebroZen page →
- Sereda M. et al. Ginkgo biloba for tinnitus. Cochrane Database of Systematic Reviews, 2022 (CD013514). 12 studies, 1,915 participants.
- U.S. Food and Drug Administration. Vinpocetine in Dietary Supplements. Statement of June 3, 2019.
- Tunkel D.E. et al. Clinical Practice Guideline: Tinnitus. Otolaryngology–Head and Neck Surgery, 2014;151(2 Suppl):S1–S40.
- Khan M. et al. A pilot clinical trial of the effects of coenzyme Q10 on chronic tinnitus aurium. Otolaryngology–Head and Neck Surgery, 2007;136(1):72–77.
- Attias J. et al. Oral magnesium intake reduces permanent hearing loss induced by noise exposure. American Journal of Otolaryngology, 1994;15(1):26–32.
- Boonstra E. et al. Neurotransmitters as food supplements: the effects of GABA on brain and behavior. Frontiers in Psychology, 2015;6:1520.
- Official CerebroZen sales, order, contact and return-policy pages, retrieved September 2026.
Related review: for the memory side of this category, see our MemoGenesis review — real prices, how its refund policy works, and what the label does not show.
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.