Ingredient profile
Green Tea Extract and L-Theanine in Neuro Recall: Amounts, Evidence, Safety
Green tea extract (at least 50% EGCG) and L-theanine are lines 5 and 7 of Neuro Recall's 635 mg blend. Label order caps them near 127 mg and 91 mg. Concentrated green tea extracts are a rare but known cause of liver injury (LiverTox - Green tea). L-theanine trials showed no clear overall effect on attention (Matyus 2025 - L-theanine meta-analysis).
Written by the Neuro Recall label deskUpdated
The basics
What are green tea extract and L-theanine?
Both come from the tea plant, Camellia sinensis, but they are very different things. One is a concentrated leaf extract. The other is a single amino acid.
Green tea extract is rich in catechins, plant compounds of which EGCG is the most concentrated (LiverTox - Green tea). Neuro Recall promises its extract is not less than 50% EGCG. Tea leaves also contain some caffeine (NCCIH - Green tea).
L-theanine is an amino acid found in tea leaves. It is sold for calm focus and sleep. On the label it appears simply as "L-Theanine."
| Label name | Green Tea (leaf) Extract (NLT 50% EGCG) |
|---|---|
| What it is | Camellia sinensis leaf |
| Position on the label | Line 5 of 10 in the 635 mg blend (listed by weight) |
| Per 2-capsule serving | Not printed. Blend line 5 of 10, so at most 127 mg |
| Amount used in research | Safety concern at 800 mg EGCG a day |
| Strength of evidence | Not a memory ingredient |
| Marketed use | Catechins and some caffeine |
| Main caution | Extracts are a rare, known cause of liver injury. |
| Label name | L-Theanine |
|---|---|
| What it is | Amino acid from tea |
| Position on the label | Line 7 of 10 in the 635 mg blend (listed by weight) |
| Per 2-capsule serving | Not printed. Blend line 7 of 10, so at most 91 mg |
| Amount used in research | 50-400 mg in small trials |
| Strength of evidence | No clear effect on attention |
| Marketed use | Calm focus |
| Main caution | May add to drowsiness with sedatives. |
On the label
How much EGCG can Neuro Recall contain?
No exact figure is printed. Green tea extract is the fifth line in a 635 mg blend listed by weight (21 CFR 101.36 - proprietary blends), so it can be 127 mg at most per serving.
If the extract were exactly 50% EGCG, that ceiling would hold about 64 mg of EGCG. "Not less than 50%" leaves room for a purer extract, so EGCG could in theory reach the full 127 mg. In practice the extract is probably lighter than its ceiling. All of these figures are our own arithmetic.
| Measure | Amount |
|---|---|
| Green tea extract, most possible (line 5) | 127 mg |
| EGCG if the extract is 50% | about 64 mg |
| Extract amounts in liver injury case reports | about 800 mg to 1.86 g a day (LiverTox - Green tea) |
| L-theanine, most possible (line 7) | 91 mg |
| L-theanine in small trials | about 50-400 mg (Matyus 2025 - L-theanine meta-analysis) |
The green tea ceiling is about one-sixth of the lowest extract dose in those case reports. That is reassuring, but a lower dose is not a promise of safety for every person.
Safety
Can green tea extract harm the liver?
Rarely, yes. The NIH LiverTox database rates green tea extract as a well-established cause of sudden liver injury, while drinking green tea has not been linked to it (LiverTox - Green tea).
Cases are uncommon and mostly involve concentrated extracts in pill form (NCCIH - Green tea). The catechins, EGCG above all, are thought to be responsible. That is why the EGCG number on the label matters.
Yellow skin or eyes, dark urine, pale stools, pain in the upper right belly, or unusual tiredness with nausea. Bring the bottle so the doctor can see every ingredient.
If you have liver disease, drink heavily or take other products with green tea extract, ask your doctor before using Neuro Recall. Many "fat burner" and energy products also carry green tea extract, and the amounts add up.
Caffeine
Does Neuro Recall contain caffeine?
Probably a little, but the label does not say how much. Green tea contains caffeine (NCCIH - Green tea), and the label does not state that the extract is decaffeinated.
The amount from a capsule-sized extract is likely small next to a cup of coffee. Still, people who are sensitive to caffeine may notice it. Taking the capsules in the morning is a simple way to keep it away from sleep.
High doses of green tea lowered blood levels of nadolol, a beta-blocker for blood pressure and heart rhythm (NCCIH - Green tea). If you take nadolol, ask your doctor before you start.
Neuro Recall: 5 bottles for $59.952 capsules a day · about $11.99 a bottle · free standard shipping · seller does not accept returns
View listingTiming
When in the day does Neuro Recall fit best?
After breakfast suits most people. The label sets no time, and the eBay listing says "After Meal." Food can also soften stomach upset from the other ingredients. The dial below places the capsules inside a day built on habits the CDC says may lower dementia risk (CDC - Reducing risk for dementia).
- After breakfast, about 8:00
Take the 2 capsules with food. The label sets no time; the eBay listing says after a meal.
- Late-afternoon walk
Regular activity is on the CDC's list of steps that may lower dementia risk.
- Blood pressure and blood sugar
Keeping both in range is on the same CDC list. Ask how yours look at your next visit.
- Night, a regular bedtime
A steady sleep routine supports attention and mood more reliably than any capsule.
Brain-health habits from the CDC (CDC - Reducing risk for dementia). Timing of the capsules comes from the eBay listing, not the label.
Full directions, including what "or as needed" means, are on the how to use Neuro Recall page.
The evidence
What did L-theanine trials find?
Not much, so far. A 2025 review pooled 5 placebo-controlled trials in 148 healthy adults who took about 50-400 mg (Matyus 2025 - L-theanine meta-analysis).
Overall, L-theanine did not change reaction time or Stroop scores in a meaningful way. There was a possible effect at higher doses on one measure. The authors rated the certainty of the evidence low to very low.
- Evidence for anxiety is limited and mixed (MSK - L-Theanine)
- Small studies hint at better sleep quality (MSK - L-Theanine)
- Neuro Recall's ceiling of 91 mg sits at the low end of the trial range
So the theanine in Neuro Recall is unlikely to do much on its own. It is still a gentle ingredient for most adults.
Our take
Is L-theanine safe with sleep or anxiety medicines?
Check first. L-theanine may add to drowsiness when taken with sedatives such as lorazepam, diazepam or zolpidem (MSK - L-Theanine).
Memory loss that disrupts daily life, or numbness and tingling, deserves a medical check. Sleep medicines themselves can affect memory, which is one more reason to review them with a doctor (MedlinePlus - Memory loss).
In their favor
- Well-known tea compounds
- EGCG strength is stated
- Amounts likely far below liver case doses
Against them
- Rare liver injury risk from extracts
- Caffeine not quantified
- Theanine trials show no clear effect
See the full side effects list or the bacopa profile. Next up: ALA, alpha-GPC, lutein and bilberry.
FAQ
Green tea and L-theanine in Neuro Recall: common questions
How much EGCG is in Neuro Recall?
Neuro Recall does not print an EGCG amount. Its green tea extract is the fifth line of a 635 mg blend, so it can weigh 127 mg at most. At 50% EGCG that would be about 64 mg. A purer extract could hold more, while a lighter one would hold less.
Is green tea extract ever hard on the liver?
It can be, though rarely. Concentrated green tea extracts are a well-established cause of sudden liver injury, while drinking green tea is not. Reported cases mostly involved large daily doses. Stop and see a doctor if you notice yellow skin or eyes or dark urine.
How much caffeine does Neuro Recall have?
The label does not state a caffeine amount. Green tea naturally contains caffeine, and the extract is not described as decaffeinated, so a small amount is likely. If you are sensitive to caffeine, take the capsules in the morning and watch how you feel.
Does L-theanine help focus?
The evidence is weak. A 2025 review of 5 small trials in healthy adults found no clear overall effect on reaction time or attention tests, with low to very low certainty. A possible effect showed up at higher doses on one measure. Neuro Recall can hold 91 mg at most.
Can I take L-theanine with sleeping pills?
Ask your doctor or pharmacist first. L-theanine may add to the drowsiness caused by sedatives such as lorazepam, diazepam or zolpidem. Do not drive or use machinery until you know how the combination affects you, and never raise a sleep medicine dose on your own.
Can I still drink green tea on Neuro Recall?
Most people can, because drinking green tea has not been linked to liver injury. Keep in mind that tea adds caffeine to the small amount the capsules may contain. Avoid stacking other pills or powders that contain green tea extract, since extract doses add up.
Who wrote this
Written and reviewed by
Pages built from the bottle label, the sales listing and linked NIH, FDA, FTC and peer-reviewed sources.
Last updated . See our editorial standards and how we check reviews. This website is run by a U.S. stocking partner, not by the manufacturer. This site is paid a commission when you order through its links.
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