Ingredient 9 of 9
Green Tea Extract in NervoMax: What 50% Means and the Liver Question
NervoMax lists "Green Tea Extract (50%)" last in its blend, with no amount. Concentrated green tea extracts are linked to rare liver injury, mostly from capsules (NCCIH, Green tea) (LiverTox, Green tea). EFSA tied 800 mg or more of EGCG a day to early liver signs (EFSA, Catechins). The label prints no caffeine figure. Extracts can also lower nadolol and atorvastatin levels.
Written by the NervoMax editorial teamUpdated
The basics
What is green tea extract, and why is it in NervoMax?
Green tea extract is a concentrate of the leaves of Camellia sinensis. It carries catechins, a group of plant compounds that includes EGCG, plus a little caffeine. The label does not say why it is in NervoMax, and no source we cite links it to nerve health.
| Label name | Green Tea Extract (50%) |
|---|---|
| What it is | Camellia sinensis · Leaf extract |
| Position on the label | 9 of 9 (labels list blend ingredients from most to least by weight) |
| Amount on the label | Undisclosed share of the 600 mg blend |
| What research has used | Liver signs at 800 mg or more of EGCG a day |
| Strength of evidence | None for nerves |
| What it is sold for | Source of catechins and a little caffeine |
| Main caution | Rare liver injury, mostly with extract capsules; interacts with some heart drugs. |
Label wording
What does "50%" mean on a green tea extract?
It usually means the extract is standardized, so half its weight is a marker compound. For green tea that is typically catechins or polyphenols. The NervoMax label does not say which, so the exact meaning is not published.
The 50% is not the extract's share of the blend. It describes the extract itself.
See every line of the label on our NervoMax Supplement Facts page.
See it
How much green tea extract can fit in the blend?
Nine ingredients share one 600 mg total. The bars compare an even split with study doses for three of them.
Green tea comes last, and labels list blend ingredients from heaviest to lightest. The lightest of nine cannot weigh more than the average, so it tops out near 67 mg per 2 capsules. At 50%, that would be about 33 mg of the marker compound at most. The real figure could be much lower.
Safety
Can green tea extract hurt your liver?
Rarely, yes. More than 100 cases of liver injury have been linked to green tea extract, with symptoms usually starting 1 to 6 months after people began taking it (LiverTox, Green tea). Most cases involve concentrated extract capsules, not brewed tea (NCCIH, Green tea).
Stop NervoMax and call your doctor if you notice yellow skin or eyes, dark urine, pain in the upper right belly, nausea or unusual tiredness. Bring the bottle so the doctor can see every ingredient.
If you have liver disease or drink heavily, ask your doctor before taking any green tea extract product.
By the numbers
How much EGCG is too much?
EFSA linked 800 mg or more of EGCG a day from supplements to early liver damage signs, and could not set a safe dose (EFSA, Catechins).
Caffeine
Does NervoMax contain caffeine?
Some, probably, because green tea extract carries caffeine unless it is decaffeinated. The label prints no caffeine amount and does not say whether the extract is decaffeinated.
| Item | Caffeine | Note |
|---|---|---|
| Brewed green tea, 12 oz | About 37 mg | FDA estimate |
| Daily amount not generally linked to harm | Up to 400 mg | Healthy adults |
| NervoMax, 2 capsules | Not published | The whole green tea extract is at most about 67 mg |
Even if all the extract were caffeine, which it is not, it could not pass about 67 mg. If you are sensitive to caffeine, count NervoMax with your coffee and tea, and ask the order desk at +1 (302) 200-3480 for the figure.
Medicines
Does green tea extract interact with medicines?
Yes, with at least two heart medicines. Green tea extract can lower blood levels of nadolol, a beta-blocker, and atorvastatin, a cholesterol drug (NCCIH, Green tea).
- Take nadolol or atorvastatin? Ask your pharmacist before starting NervoMax.
- Take other heart, blood pressure or liver medicines? Bring the bottle to your next visit.
- Check the rest of the blend's cautions on NervoMax side effects.
Think of a 58-year-old on atorvastatin who also drinks three cups of green tea daily. Adding an extract on top is worth a two-minute pharmacist question.
Keep going
What is the fair take on green tea extract in NervoMax?
The amount is likely small, since it sits last, and the label names it openly. Still, no dose, EGCG figure or caffeine figure is printed. Two other blend ingredients, vitamin B6 and ginkgo, carry bigger questions. Next on the list is pink salt, the first ingredient.
FAQ
Green tea extract in NervoMax: common questions
Is green tea extract bad for your liver?
Rarely, it can harm the liver. More than 100 cases of liver injury have been linked to green tea extract, mostly from concentrated capsules, with onset usually 1 to 6 months after starting. Brewed tea is far less of a concern.
What does green tea extract 50% mean?
It usually means the extract is standardized so half its weight is a marker compound, often catechins or polyphenols. The NervoMax label does not say which compound. The 50% describes the extract, not its share of the blend.
How much EGCG is safe per day?
No safe dose has been set. EFSA found that 800 mg or more of EGCG a day from supplements may cause early signs of liver damage. NervoMax does not print its EGCG content, but the whole extract cannot top about 67 mg.
Does NervoMax have caffeine in it?
Probably a little, from green tea extract, but the label prints no caffeine amount. The whole extract is at most about 67 mg per 2 capsules. A 12 oz cup of brewed green tea has about 37 mg of caffeine.
Can I take green tea extract with atorvastatin?
Ask your pharmacist first. Green tea extract can lower blood levels of atorvastatin and of nadolol, a beta-blocker. That applies to NervoMax too, since it contains green tea extract.
Is green tea extract good for nerve pain or neuropathy?
No source we cite links green tea extract to nerve health, and no study has tested NervoMax for numbness or tingling. Green tea extract is studied mostly for safety questions, such as liver injury and drug interactions, rather than nerve benefits.
What are signs of liver problems from supplements?
Yellow skin or eyes, dark urine, pain in the upper right belly, nausea and unusual tiredness. Stop the supplement and call your doctor if you notice any of these, and bring every bottle you take.
Who wrote this
Written and reviewed by
Plain-language pages built from the bottle label and linked public health sources such as NIH, FDA and Cochrane.
Last updated . Read our editorial standards and how we check reviews. This website is run by Nervomax, a USA authorized NervoMax retailer, not by the manufacturer. We earn money when you buy through our order links.
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