Quick Answer
Theanine Executive Function Randomized Trial has evidence relevant to safety, limits, and clinician-discussion contexts, but conclusions should stay close to the cited sources. One representative finding is: In addition, to investigate whether the single response was associated with cognitive function after regular ingestion, we compared the results of a single-dose and regular ingestion.
Key Takeaways
- 01In addition, to investigate whether the single response was associated with cognitive function after regular ingestion, we compared the results of a single-dose and regular ingestion. [Baba Yoshitake (2021)]
- 02A single dose of-theanine reduced reaction time in the attention task and increased correct answers and decreased the number of omission errors in the working memory task. [Baba Yoshitake (2021)]
- 03α α 29 30 , 31 32 Studies that explored brain activity have previously reported that-theanine intake increases-wave activity.A study by Gomez-Ramirezfound that subjects who ingested 250 mg of-theanine had increased-wave activity for the attention task to be performed. [Baba Yoshitake (2021)]
- 041 2 3 4 5 6 7 l l l-theanine is a nonproteinogenic amino acid contained in green teaand mushrooms.Among the different tea varieties in Japan, gyokuro and matcha contain more-theanine than sencha.-theanine affects brain functions.Studies in mice indicate that it improves behavior under stress conditions,suppresses deterioration of learning ability under social stress,and improves memory impairment. [Baba Yoshitake (2021)]
The current Migaku evidence database contains 2 reusable source documents for Theanine Executive Function Randomized Trial. This answer focuses on safety, limits, and clinician-discussion contexts.
- In addition, to investigate whether the single response was associated with cognitive function after regular ingestion, we compared the results of a single-dose and regular ingestion. [Baba Yoshitake (2021); evidence level 2]
- A single dose of-theanine reduced reaction time in the attention task and increased correct answers and decreased the number of omission errors in the working memory task. [Baba Yoshitake (2021); evidence level 2]
- α α 29 30 , 31 32 Studies that explored brain activity have previously reported that-theanine intake increases-wave activity.A study by Gomez-Ramirezfound that subjects who ingested 250 mg of-theanine had increased-wave activity for the attention task to be performed. [Baba Yoshitake (2021); evidence level 2]
- 1 2 3 4 5 6 7 l l l-theanine is a nonproteinogenic amino acid contained in green teaand mushrooms.Among the different tea varieties in Japan, gyokuro and matcha contain more-theanine than sencha.-theanine affects brain functions.Studies in mice indicate that it improves behavior under stress conditions,suppresses deterioration of learning ability under social stress,and improves memory impairment. [Baba Yoshitake (2021); evidence level 2]
- The PSQI subscale scores for sleep latency, sleep disturbance, and use of sleep medication reduced after L-theanine administration, compared to the placebo administration (all p p = 0.001 and 0.031, respectively). [Hidese S (2019); evidence level 2]
Evidence levels are sorting aids, not final clinical grades. Level 1 usually indicates systematic-review style evidence, level 2 indicates randomized trials or public-health guidance, and lower levels need more cautious wording.
This page is educational. People with medical conditions, pregnancy, medication use, or unusual symptoms should ask a qualified clinician before changing supplements, medication, or treatment routines.
Sources