L-Theanine is an amino acid analogue found commonly in the plant that gives us green, black and oolong tea (Camellia sinensis).
In recent years it has shown an abundance of beneficial actions on the brain and vascular systems. It works through several pathways including the dopaminergic pathway, vasodilation including the cerebral arteries, and through a possible mimicing action of glutamic acid.
L-Theanine is easily obtained in pure form online, or through high quality shade grown green tea such as matcha or gyokuro. It combines very well with caffeine, and has been shown to ammeliorate many of the negative side effects of this common stimulant.
New to nootropics? Check out this Introduction to Nootropics!
Where Does It Come From?
L-theanine is an amino acid isomer found naturally in plants of the Theaceae family. camellia sinensis primarily. In this species, the L-Theanine content is especially high in shade grown crops like Gyokuro or high quality sencha.
- In combination with caffeine
- To improve memory
- To improve concentration
- Sedative (Mild)
- Reduces stress
- Antidepressant (Mild)
L-Theanine is an amino acid analogue of the proteogenic amino acids L-glutamate and L-glutamine .
Still compiling research...
Pharmacology and Medical Research:
Still Compiling research.
Still compiling research.
No negative side effects were noted in the dosage range of 200-400 mg/day.
Synergistic with caffeine. Works to reduce the side effects of the caffeine, and improve the cognitive enhancing ability. L-theanine is calming and imporves concentration, caffeine stimulates the mind and reduces fatigue and sleepiness.
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Updated: March 2017
Recent Blog Posts:
- Nathan PJ, Lu K, Gray M, Oliver C (2006) The neuropharmacology of L- theanine(N-ethyl-L-glutamine): A possible neuroprotective and cognitive enhancing agent. J Herb Pharmacother 6:21–30