Ingredient
Green tea extract in ZenCortex: What the Label and the Research Say
Green tea extract is the seventh of 22 lines in the ZenCortex Proprietary Herbal Blend. By label order it can weigh at most 28.6 mg per 1 mL serving, and the label prints no amount. It carries caffeine, rare liver injury has been reported with concentrated extracts, and it can lower atorvastatin levels. No study ties it to hearing.
Written by the ZenCortex label deskUpdated
The ingredient01
What is green tea extract in ZenCortex?
Green tea extract is a concentrate from the leaves of the tea plant, and ZenCortex lists it as "Green Tea (Camellia sinensis) Leaf Extract". It is line 7 of 22.
The leaf is a source of catechins, plant compounds studied for weight and cholesterol, and it carries some caffeine (NCCIH, Green Tea). A cup of brewed tea and a capsule of extract are different things, and the extract is the riskier form.
The seller's info page ties it to blood flow with the line "Improves blood flow to the ears". The bottle makes no such claim.
| Name on the label | Green Tea (Camellia sinensis) Leaf Extract |
|---|---|
| What it is | Leaf extract; a source of catechins and some caffeine |
| Place on the label | Line 7 of 22 in the 200 mg proprietary blend |
| Amount per serving (1 mL) | At most 28.6 mg per 1 mL serving (label order); 9.1 mg if the 22 lines were split evenly |
| What research used | A cup of tea contains caffeine; concentrated extract in capsules carries more risk than the drink |
| Strength of evidence | Catechins and caffeine may have a modest effect on weight, and extracts slightly lowered cholesterol. Nothing on hearing |
| Marketed or traditional use | Marketed for blood flow ('Improves blood flow to the ears' on the info page) |
| Main caution | Liver injury is uncommon but reported, mainly with extract tablets or capsules; it carries caffeine and can lower atorvastatin and nadolol levels. |
Label position02
How much green tea extract is in ZenCortex?
The label does not print it. Green tea extract is line 7, so label order caps it at 28.6 mg per serving, which is 200 divided by 7.
The cap follows from the weight rule for blends (eCFR, 21 CFR 101.36 Supplement Facts): each line weighs at least as much as the next, so seven lines cannot together pass 200 mg and the seventh cannot exceed a seventh of it.
Two droppers a day would give at most 57.2 mg of the extract. An even split of the blend would be about 9.1 mg per serving, and the label sets no floor.
| Place in the blend | 7 of 22 |
|---|---|
| Most per serving | 28.6 mg |
| Most per day (2 droppers) | 57.2 mg |
| Even split (for comparison) | About 9.1 mg |
| Catechins or caffeine printed | None |
Doses03
How does a green tea extract dose compare with a cup of tea?
The NCCIH page we cite gives no standard dose, and it says the drink and the extract differ in risk (NCCIH, Green Tea). So we do not offer a milligram target.
It does draw one clear line. No safety concerns are reported for green tea as a drink in adults, while liver injury has been reported mainly with extract tablets and capsules. Concentration is the difference.
At most 57.2 mg of extract a day is a small weight. The label gives no figure for strength, so it says nothing about catechins, and we make no claim about safety from the number alone.
Evidence04
Does green tea extract help hearing or blood flow?
No study we found shows that green tea extract helps hearing or blood flow to the ears. NCCIH says definite conclusions cannot yet be reached for most uses (NCCIH, Green Tea).
The page reports a modest effect of catechins and caffeine on weight, and a slight drop in total and LDL cholesterol with extracts. A Cochrane review of 18 trials found very small weight loss with green tea, unlikely to matter clinically (NCCIH, Supplements for Weight Loss, Bodybuilding, Sexual Enhancement).
Weight and cholesterol are not hearing outcomes. The NIDCD adds that no supplement has been proven to relieve tinnitus (NIDCD, Tinnitus).
ZenCortex: from $49 a bottle60 mL drops · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day guarantee
See packsCautions05
Is green tea extract safe for the liver and with medicines?
Liver injury from green tea extract is uncommon but has been reported, mainly with tablets or capsules (NCCIH, Green Tea). People with a certain immune-gene variant, 5 to 15 percent of Americans, appear more susceptible.
Interactions matter too. High doses can lower blood levels of nadolol, the extract can lower atorvastatin levels, and an interaction with raloxifene has been shown (NCCIH, Green Tea). NCCIH's herb-drug digest repeats the nadolol and atorvastatin examples (NCCIH, Herb-Drug Interactions).
Because of the caffeine, FDA's 400 mg a day guide for most adults counts everything you take in (FDA, How Much Caffeine Is Too Much?). Stop and call a provider if side effects appear (NCCIH, Using Dietary Supplements Wisely).
Never skip a statin or beta blocker because of a supplement. Ask your pharmacist, and see ZenCortex side effects.
Marketing check06
Does green tea extract make ZenCortex a stimulant?
It adds to it. Green tea extract carries caffeine, and guarana does too, so the info page's "No Stimulants" line cannot be confirmed from the label.
The label prints no caffeine amount. Read the full discussion on the guarana page. FDA says caffeine is added to many products including supplements, so labels matter (FDA, How Much Caffeine Is Too Much?).
The bottle's own claim is "Supports Healthy Hearing†", with the FDA statement attached. FDA does not approve supplements before sale (FDA, Dietary Supplements).
Keep reading07
What ingredient comes after green tea extract on the label?
Line 8 is Gymnema sylvestre. Line 6 is astragalus.
Read the supplement facts page for the whole panel and the ZenCortex price guide for packs.
FAQ08
ZenCortex questions people ask
Does green tea extract have caffeine?
Yes. NCCIH says green tea contains caffeine, and ZenCortex lists the leaf extract at line 7. The label prints no caffeine amount, so the amount per dropper is unknown. Count it with coffee and other sources.
Can green tea extract hurt your liver?
Rarely. NCCIH calls liver injury uncommon but reported, mainly with extract tablets or capsules. If you have liver disease, ask a clinician first.
Does green tea extract interact with statins?
It can. NCCIH says green tea extract can lower atorvastatin levels. Keep taking your statin as prescribed and show your pharmacist the ZenCortex bottle so they can check the interaction.
What is the most green tea extract in a ZenCortex dropper?
At most 28.6 mg, which is 200 mg divided by 7, because it is listed seventh. The label sets no floor and prints no amount, so the real figure is unknown. Two droppers a day would double it.
Does green tea extract improve blood flow to the ears?
No source we found shows that. The info page claims it, but NCCIH says definite conclusions cannot yet be reached for most uses. The bottle does not make the claim.
Is green tea extract the same as drinking green tea?
No. NCCIH reports no safety concerns for green tea as a drink in adults, while liver injury has been reported mainly with extract tablets or capsules. The drops hold an extract, not a brewed cup.
Who wrote this09
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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