L-Theanine: A Simplified Nootropic Explanation

L-Theanine for Nootropic Use Explained in Simple Terms:

L-Theanine is an amino acid that is most commonly found in green and black teas, but is uncommon in the rest of the human diet. As a nootropic, it is commonly taken to induce a state of relaxation without inducing drowsiness, increase focus, and reduce anxiety.

“L-Theanine significantly increases activity in the alpha frequency band which indicates that it relaxes the mind without inducing drowsiness. However, this effect has only been established at higher doses than that typically found in a cup of black tea.”

– National Center for Biotechnology Information

Benefits of L-Theanine

Benefits of Taking L-Theanine as a Nootropic include:

Relaxation without inducing drowsiness [1]

Increased attention span [2]

Better sleep quality [4]

Reduced anxiety [4]

Risks of L-Theanine

Benefits of Taking L-Theanine as a Nootropic include:

The FDA has classified the ingestion of L-Theanine in doses of 250mg per serving under “Generally Recognized as Safe”. [3]

As with any nootropic substance, women who are pregnant or breastfeeding should not use L-Theanine unless advised by a doctor.

Dosages of L-Theanine for Nootropic Use

L-Theanine is commonly sold and used in dosages of 100mg to 200mg daily. It has been clinically tested at dosages of 400mg per day in divided doses.

Common Dosage: 200mg/day

Anecdotal Evidence

Anecdotal Evidence of L-Theanine Used as a Nootropic

Anecdotal evidence of successfully using L-Theanine as a nootropic substance to induce relaxation, reduce anxiety, and improve focus is quite prevalent.

The following are anecdotal accounts from people who have taken L-Theanine. These are not medical claims, recommendations, or backed by clinical studies:

“I have ADD and get anxious due to overactive mind. I have tried many products, and so far, this is the only one that works for me. Does not make you drowsy. I take one before work, and one after work. Takes the edge off anxiety.” Wolf_CPT – Amazon Review of Suntheanine 200mg Softgels

“I truly believe this amazing supplement is helping my health. So far it’s giving me energy, I was so fatigued all the time. It’s helping me sleep and keeping me calm. Energy level is better.” Christina Ann Lemieux-George – Amazon Review of Suntheanine 200mg Softgels

Clinical Studies | References

[1] Nobre AC, et al. (n.d.). L-theanine, a natural constituent in tea, and its effect on mental state. – PubMed – NCBI. Retrieved from https://www.ncbi.nlm.nih.gov/pubmed/18296328

[2] Foxe, J. J., Morie, K. P., Laud, P. J., Rowson, M. J., de Bruin, E. A., & Kelly, S. P. (2012, June). Assessing the effects of caffeine and theanine on the maintenance of vigilance during a sustained attention task [Abstract]. Neuropharmacology62(7), 2320–2327. Retrieved from https://www.ncbi.nlm.nih.gov/pubmed/22326943

[3] Generally recognized as safe (GRAS). (2019, October 29). Retrieved from https://www.accessdata.fda.gov/scripts/fdcc/index.cfm?set=GrASNotices&id=209

[4] Sarris J , et al. (n.d.). L-theanine in the adjunctive treatment of generalized anxiety disorder: A double-blind, randomised, placebo-controlled trial. – PubMed – NCBI. Retrieved from https://www.ncbi.nlm.nih.gov/pubmed/30580081

Recommended Brands

Recommended L-Theanine Brands for Nootropic Use:

In general you are fine buying the least expensive L-Theanine offered by a trusted supplier. Some premium brands carry a heftier price tag in exchange for better packaging, branded ingredients, and 3rd party purity testing certificates.

Amazon Suppliers:

Premium | Suntheanine

Fair Price Doctor’s Best L-Theanine

Non-Amazon Suppliers

Premium | Nootropics.com L-Theanine

Fair Price Nootropics Depot L-Theanine | Best Choice