Ingredient
Astragalus in ZenCortex: What the Label and the Research Say
Astragalus in ZenCortex is a root extract of Astragalus membranaceus, a herb from traditional Chinese medicine, listed sixth in the 200 mg Proprietary Herbal Blend. By label order it can weigh at most 33.3 mg per 1 mL serving, and no amount is printed. Most claims come from cell and animal work, and none concern hearing.
Written by the ZenCortex label deskUpdated
The basics01
What is astragalus in ZenCortex?
Astragalus in ZenCortex is a root extract of Astragalus membranaceus, a plant used for centuries in traditional Chinese medicine. The label lists it as "Astragalus (root) extract" in sixth place.
In that tradition it is a tonic for stamina and vitality, and it is purported to support immunity and reduce cancer-related fatigue (MSK, Astragalus). Those are the roles the herb is known for.
The seller's info page ties it to "Supports clear sounds". The bottle itself says nothing about astragalus, and we found no study linking the root to hearing.
Label position02
Where does astragalus sit on the ZenCortex label?
Astragalus is line 6 of 22 in the blend, after eleuthero and before green tea extract. The blend totals 200 mg for a 1 mL serving.
Blend lines run from most to least by weight, and only the total is shown (eCFR, 21 CFR 101.36 Supplement Facts). Astragalus therefore weighs no more than the five lines above it and no less than green tea extract.
Sixth of 22 puts it in the upper third. It outweighs or ties the 16 lines below it, yet "heavier" might still be a modest number of milligrams.
Label math03
How much astragalus is in ZenCortex?
The label does not say. By label order, astragalus can weigh at most 33.3 mg per serving, about 17% of the blend.
The calculation: 200 mg divided by 6 is 33.3 mg. A line cannot outweigh the line before it, so if the first five were light, astragalus would be lighter too. An even split of 22 lines is about 9.1 mg.
Taking one dropper twice a day doubles the ceiling to 66.7 mg a day. Again, that is a ceiling. Nothing printed shows whether the real figure is 9 mg or 33 mg.
The bar splits the 200 mg blend 22 ways. See the ZenCortex ingredients page for every line.
Research04
What does research say about astragalus?
Research on astragalus mostly comes from cells and animals. Memorial Sloan Kettering says most anticancer and organ-protective claims rest on cell and animal studies, and human studies are small (MSK, Astragalus).
The same page notes that meta-analyses on chemotherapy side effects had mostly poor methods. There is no standard dose on the cited page, so a 33.3 mg ceiling cannot be lined up with any studied amount.
We found no study of astragalus and hearing, tinnitus or memory. That means "Supports clear sounds" on the info page is a seller phrase, not a research finding.
What the label order adds
It adds a ceiling and nothing else. Without a printed amount, a reader cannot judge whether any trial of the root is relevant to a dropper of ZenCortex.
At a glance05
What are the astragalus facts in one table?
The table lays the label wording, the ceiling, the research and the main caution side by side.
Read the amount as arithmetic, and the evidence row as early-stage work.
| Name on the label | Astragalus (root) extract (Astragalus membranaceus) |
|---|---|
| What it is | Root of a Chinese herb |
| Place on the label | Line 6 of 22 in the 200 mg proprietary blend |
| Amount per serving (1 mL) | At most 33.3 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 | Most claims come from cell and animal studies; human studies are small. Nothing on hearing |
| Marketed or traditional use | Traditional Chinese medicine tonic ('Supports clear sounds' on the info page) |
| Main caution | May raise bleeding risk with warfarin, reduce immunosuppressants, add to blood-pressure drugs and increase diuretic effects; possible estrogenic activity. |
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 astragalus safe with medicines?
Astragalus can matter with several kinds of medicine. It may raise bleeding risk with warfarin, add to blood-pressure drugs and increase the effect of diuretics (MSK, Astragalus).
It may also reduce immunosuppressants. One patient's tacrolimus level fell nearly 50% on a multi-herb formula, which is why transplant patients should ask before taking any herbal product. Reported side effects include fatigue, headache and low blood pressure that lasted 24 hours in one study. Possible estrogenic activity is a concern for hormone-sensitive cancers.
The label asks adults to consult a physician before use, especially with a medication or a medical condition, and says it is not for anyone under 18 or pregnant or nursing.
Never stop or change a dose because you started a supplement. A pharmacist can check the whole label against your list (NCCIH, Herb-Drug Interactions).
Claims vs evidence07
Does astragalus support clear sounds or hearing?
No study shows that astragalus supports clear sounds or hearing. The bottle claims only "Supports Healthy Hearing†" for the product as a whole.
NIDCD says no supplement has been proven effective for tinnitus (NIDCD, Tinnitus). A hearing test is the sound first step if your hearing has changed (NIDCD, Who Can I Turn to for Help with Hearing Loss), and sudden hearing loss in one ear needs same-day care (NIDCD, Sudden Deafness).
A fair reading: astragalus is a traditional tonic herb with early evidence in other areas, placed in a hearing-labeled product at an unstated amount.
Before you order08
Should astragalus affect your decision to buy ZenCortex?
It should if you take warfarin, blood-pressure medicine, diuretics or anything that suppresses the immune system. Otherwise it is one line among 22.
A bottle lasts 30 days at two droppers a day. Packs cost $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 gymnema sylvestre, and the one before is Asian ginseng. All 14 ingredient pages share one layout.
Read the ZenCortex supplement facts and ZenCortex side effects next.
FAQ10
ZenCortex questions people ask
What is astragalus root used for?
Traditional Chinese medicine uses astragalus as a tonic for stamina and vitality, and it is purported to support immunity (MSK, Astragalus). Most claims come from cell and animal studies, and ZenCortex does not claim any of those uses.
How many milligrams of astragalus are in ZenCortex?
The label does not say. Sixth in a 200 mg blend, astragalus can weigh at most 33.3 mg per 1 mL dropper, which is 200 divided by 6. An even split of 22 lines would give about 9.1 mg.
Can astragalus interact with warfarin?
It may raise bleeding risk with warfarin (MSK, Astragalus). If you take a blood thinner, ask your doctor before starting ZenCortex, and keep taking the blood thinner exactly as prescribed.
Does astragalus weaken immunosuppressant drugs?
It may. One patient's tacrolimus level fell nearly 50% on a multi-herb formula containing astragalus (MSK, Astragalus). Anyone on immunosuppressants should speak with their transplant or specialist team before using ZenCortex.
Is astragalus estrogenic?
The Memorial Sloan Kettering page names possible estrogenic activity as a concern for hormone-sensitive cancers (MSK, Astragalus). If you have one, ask your oncologist before using any herbal blend, including ZenCortex.
Does astragalus lower blood pressure?
It may add to blood-pressure drugs, and one study saw low blood pressure last 24 hours (MSK, Astragalus). If you take blood-pressure medicine, tell your doctor about ZenCortex and keep taking your medicine.
Why does the info page say astragalus supports clear sounds?
The info page uses "Supports clear sounds" as a seller phrase. We found no study of astragalus and hearing, and the bottle makes no such claim. Treat it as marketing, not a finding.
Is astragalus a cancer treatment?
No. The cited page says cancer and organ claims rest on cell and animal studies and small human studies (MSK, Astragalus). ZenCortex makes no such claim.
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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