It is a pill. Theanine is an amino acid.
L-theanine:
Member's comments
(puritan's pride) 200 mg capsules 2- 3/ day. I have been taking this prior to cymbalta detox. It helped me reduce my dosage of clonazepam. Within 20-30 mins I feel more calm. I do believe it is helping keep the anxiety in check.
Tinabee - For now I have started taking fish oil and a supplement called Theanine Serene that is supposed to help with anxiety. I know it sounds silly since I've only taken the anxiety supplement for a couple days but I really feel like it has helped.
200mg L-Theanine in the morning with a full glass of water on an empty stomach, you can take again in late afternoon 100 to 200 mg if needed (make sure it is suntheanine - it helps with headaches and pain as any painkiller I had just did not cut it)
Member's comments were generally favorable.
http://www.cymbaltaw...page-2?hl=helps
Page 1 and 2, detailed information on L theanine and its usage.
Research
The research shows that all green tea leaves contain both L-theanine and D- theanine BUT only the special processing used by the manufacturer produces pure L-Theanine and is the choice of many of the research biologists.
https://www.ncbi.nlm...pubmed/22214254
https://www.ncbi.nlm...pubmed/16759779
https://www.ncbi.nlm...pubmed/14755608
Rapid Commun Mass Spectrom. 2004;18(3):251-6.
Analysis of derivatized and underivatized theanine enantiomers by high-performance liquid chromatography/atmospheric pressure ionization-mass spectrometry.
Five of the six products contained significant amounts of D-theanine. Only one product, SunTheanine, appeared to contain only the L-theanine enantiomer.
https://www.ncbi.nlm...les/PMC3049752/
Note - Suntheanine is the pure ingredient and that is what you want. That is the pure L-theanine. D-theanine is not absorbed by our bodies.
L-theanine is an amino acid precursor to glutamate and glutamine.
Key Points
It can cross the blood brain barrier. It is only produced by plants and fungi. It inhibits glutamine transporters and glutamate transporters, and thus blocks the reuptake of glutamine and glutamate. Theanine increases serotonin, dopamine, GABA, and glycine levels in various areas of the brain. Caution – Most plants that contain L-theanine also contain caffeine and it can be a significant contaminant in L-theanine supplements. Theanine has been studied for its potential ability to reduce mental and physical stress, improve cognition, and boost mood and cognitive performance in combination with caffeine. In combination with caffeine it may increase anxiety.
Scientific Information
A National Standard monograph that reviews current research on theanine reports that it is likely safe in doses of 200–250 mg up to a maximum daily dose of 1,200 mg. Theanine is used to help with anxiety, blood pressure control, mood, and cognition. Natural Standard rates the evidence to support the usage for anxiety, blood pressure control, and mood as “unclear or conflicting scientific evidence” and the evidence for cognition as “fair negative scientific evidence.” Many of the studies of theanine were done in combination with caffeine as found in tea. While the studies found that the combination had some effect on mood, the studies found that theanine alone had little effect. More sufficiently designed studies in humans are warranted to further our understanding of the effects of theanine.
https://www.ncbi.nlm...pubmed/21208586
Effective, 400 mg/day
https://www.ncbi.nlm...pubmed/15378679
Not effective on anxiety, 200 mg/day
https://www.ncbi.nlm...les/PMC4137547/
Used to treat PTSD. It was successful in treating 8 gene problems associated with PSTD in the hippocampus and amygdala.