Ingredient
Eleuthero in ZenCortex: What the Label and the Research Say
Eleuthero in ZenCortex is a root extract of Eleutherococcus senticosus, also called Siberian ginseng, listed fifth in the 200 mg Proprietary Herbal Blend. By label order it can weigh at most 40 mg per 1 mL serving, and the label prints no real amount. Human studies are limited, and none looked at hearing.
Written by the ZenCortex label deskUpdated
The basics01
What is eleuthero in ZenCortex?
Eleuthero in ZenCortex is a root extract of Eleutherococcus senticosus, a shrub of northeast Asia. The label calls it "Eleuthero (root) extract" and lists it fifth.
It is also known as Siberian ginseng, but it is a different plant from the Panax ginseng on line 12. The two share a nickname and little else, so the evidence for one does not transfer to the other.
Traditionally it is used as an adaptogen, a word herbalists use for something said to help the body cope with stress, and to boost immunity, strength and stamina (MSK, Siberian Ginseng (Eleuthero)). None of those uses is hearing.
Label position02
Where does eleuthero sit on the ZenCortex label?
Eleuthero is line 5 of 22, between African mango and astragalus. The Proprietary Herbal Blend totals 200 mg per 1 mL serving.
The rule for blends is that ingredients appear from most to least by weight, with only the blend total printed (eCFR, 21 CFR 101.36 Supplement Facts). So eleuthero weighs no more than the four lines above it and no less than astragalus below it.
Being fifth of 22 is a mid-high rank. It means eleuthero is probably one of the larger plant lines in the blend, but "larger" could still be a few milligrams.
Label math03
How much eleuthero is in ZenCortex?
The label does not say. By label order, eleuthero can weigh at most 40 mg per serving, one fifth of the blend.
The arithmetic: 200 mg divided by 5 is 40 mg. If the first four lines were light, line 5 could not be heavier than line 4, so the true figure is likely lower. An even split of 22 lines is about 9.1 mg.
At the label's one dropper twice a day, the daily ceiling is 80 mg. That is a limit, not a measurement, and no printed figure lets a reader know where eleuthero falls between 9 and 40.
The bar splits the 200 mg blend 22 ways. The full list is on the ZenCortex ingredients page.
Research04
What does research say about eleuthero?
Research on eleuthero is thin. The Memorial Sloan Kettering page says human studies are quite limited and that early findings do not establish clinical benefit (MSK, Siberian Ginseng (Eleuthero)).
The one human example it names is a small knee osteoarthritis trial of an herbal mixture, which is a long way from a hearing study. We found no study of eleuthero and hearing, tinnitus or memory.
The cited page gives no standard dose, so a 40 mg ceiling cannot be matched to a studied amount. Any claim that "eleuthero at this dose does X" would be invented.
Why the nickname misleads
Because Siberian ginseng sounds like ginseng, readers assume the ginseng evidence applies. It does not. See the separate Asian ginseng page for Panax ginseng.
At a glance05
What are the eleuthero facts in one table?
The table puts the label wording, the ceiling, the research and the main caution on one screen.
The amount row is a limit from arithmetic. The evidence row reflects what the cited page says about human studies.
| Name on the label | Eleuthero (root) extract (Eleutherococcus senticosus) |
|---|---|
| What it is | Also called Siberian ginseng; a different plant from Panax ginseng |
| Place on the label | Line 5 of 22 in the 200 mg proprietary blend |
| Amount per serving (1 mL) | At most 40 mg per 1 mL serving (label order); 9.1 mg if the 22 lines were split evenly |
| What research used | No standard dose on the cited page |
| Strength of evidence | Human studies are quite limited and early findings do not show clinical benefit. Nothing on hearing |
| Marketed or traditional use | Traditional 'adaptogen' marketed for stamina and focus |
| Main caution | Case reports describe raised digoxin levels and a brain bleed on a multi-herb product; avoid when breastfeeding. |
ZenCortex: from $49 a bottle60 mL drops · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day guarantee
See packsCautions06
Is eleuthero safe with medicines?
Eleuthero can matter if you take digoxin. A case report found raised digoxin levels, and the herb may falsely raise digoxin test results (MSK, Siberian Ginseng (Eleuthero)).
The same page describes a case report of bleeding around the brain in a woman taking a multi-herb product that contained eleuthero. That does not show eleuthero caused it, but it is why a blood-thinner user should ask first. Lab work suggests effects on liver enzymes and a transporter that handles methotrexate, and the page says their relevance is unknown. Avoid it when breastfeeding, because safety is unknown.
The label asks adults to consult a physician before use, especially with a medication or a medical condition. It is not for anyone under 18 or pregnant or nursing.
Never stop or change a dose because you started a supplement. Ask a pharmacist to check the full label (NCCIH, Herb-Drug Interactions).
Claims vs evidence07
Does eleuthero help hearing or ringing in the ears?
Nothing shows that eleuthero helps hearing or ringing in the ears. The bottle claims only "Supports Healthy Hearing†" for the whole product.
The NIDCD says supplements are often advertised for tinnitus but none has been proven effective (NIDCD, Tinnitus). If hearing changes, start with a hearing test (NIDCD, Who Can I Turn to for Help with Hearing Loss). Sudden hearing loss in one ear is an emergency (NIDCD, Sudden Deafness).
A fair read: eleuthero is a traditional stamina herb in a hearing-labeled product, with unstated amounts and limited human research.
Before you order08
Should eleuthero affect your decision to buy ZenCortex?
It should if you take digoxin, a blood thinner or methotrexate, or if you are breastfeeding. Otherwise it is one line among 22.
A bottle lasts 30 days at two droppers a day. Packs run $79, $69 or $49 a bottle on the seller's info page (ZenCortex info page). See ZenCortex price and the guarantee.
Keep reading09
Which ZenCortex ingredient page comes next?
The next page covers green tea extract and the one before is African mango. All 14 ingredient pages use the same layout.
Read the ZenCortex supplement facts and ZenCortex side effects next.
FAQ10
ZenCortex questions people ask
Is eleuthero the same as ginseng?
No. Eleuthero, or Siberian ginseng, is Eleutherococcus senticosus, a different plant from Panax ginseng. ZenCortex lists both, eleuthero on line 5 and Asian ginseng on line 12, and the research on one does not apply to the other.
How much eleuthero is in a ZenCortex dropper?
The label does not say. Fifth in a 200 mg blend, eleuthero can weigh at most 40 mg per 1 mL dropper, which is 200 divided by 5. An even split of 22 lines would give about 9.1 mg.
What is eleuthero used for?
Traditionally it is used as an adaptogen and to boost immunity, strength and stamina (MSK, Siberian Ginseng (Eleuthero)). Human studies are limited, and the label of ZenCortex does not claim any of those uses.
Can eleuthero interact with digoxin?
It may. A case report found raised digoxin levels, and eleuthero may falsely raise digoxin lab results (MSK, Siberian Ginseng (Eleuthero)). Tell your doctor about ZenCortex if you take digoxin, and keep taking it as prescribed.
Is eleuthero safe while breastfeeding?
Avoid it. The Memorial Sloan Kettering page says safety during breastfeeding is unknown (MSK, Siberian Ginseng (Eleuthero)). The ZenCortex label also says it is not for anyone pregnant or nursing, so skip the drops.
Does eleuthero thin the blood?
The cited page does not describe a clotting effect, but it reports a brain bleed in a woman on a multi-herb product containing eleuthero (MSK, Siberian Ginseng (Eleuthero)). If you take a blood thinner, ask your doctor before starting ZenCortex.
Why do eleuthero studies not prove hearing support?
They never measured hearing. The page on eleuthero describes limited human research and early findings that do not show clinical benefit (MSK, Siberian Ginseng (Eleuthero)). A stamina herb is not evidence for ears.
What is an adaptogen, and does ZenCortex say eleuthero is one?
An adaptogen is a herb said to help the body handle stress. The ZenCortex label does not use the word. It is a traditional label from herbal medicine, not a result shown in hearing trials.
Who wrote this11
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by Thezencortex, a retailer of ZenCortex, not by the manufacturer. We earn money when you buy through our order links.
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