Claire Hosking N.D.
Specialist Naturopath, Holistic Nutritionist, Herbalist
Not sure about you, but recently, I’ve found L-Theanine mentioned everywhere, including non-alcoholic wine.
This is not only a fascinating idea, but potentially therapeutic for those wanting to be social, sober and also looking for some extra support for their nervous system.
SO WHAT IS L-THEANINE?
L-Theanine is a unique, non-protein amino acid primarily found in green tea leaves. Known for its calming and relaxing properties, L-Theanine easily crosses the blood-brain barrier, promoting a state of relaxed alertness without causing drowsiness. It works by modulating key neurotransmitters in the brain such as GABA, serotonin, and dopamine, which play vital roles in mood regulation, stress reduction, and cognitive function.
Research shows that L-Theanine supports mental health by reducing stress and anxiety symptoms, improving sleep quality, and enhancing cognitive functions like verbal fluency and executive functioning. It increases alpha brain wave activity, which is associated with a calm yet focused mind, making it perfect for those dealing with daily stress or seeking better concentration.
Additionally, L-Theanine may assist in balancing brain excitatory and inhibitory neurotransmitters, protecting neurons, and supporting healthy sleep patterns. With a favorable safety profile, L-Theanine is a natural, effective supplement to promote relaxation, reduce anxiety, and boost mental clarity.
If you would like to see whether L-Theanine is right for you, or learn more about other ways that naturopathy can support your health, I would love to chat with you further. Please call our reception team on 03 5221 8220 to book an appointment.
In love and kindness,
Claire
P.s. Matt and Rob spoke about L-Theanine in their first podcast episode. You can listen to Naturopathy Matters on Apple Podcasts, Spotify, or YouTube if you are interested.
REFERENCES
- Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults. Nutrients 11 (2019): 2362.
- L-Theanine as a Natural Anxiolytic: A Review of Its Neurophysiological Mechanisms, Clinical Efficacy, and Safety in Anxiety and Stress Management. African Journal of Biomedical Research 28, no. 4s (November 2025): 601–608.
- Effect of Alpha-S1-Casein Tryptic Hydrolysate and L-Theanine on Poor Sleep Quality: A Double Blind, Randomized Placebo-Controlled Crossover Trial. Nutrients 14 (2022): 65.
- A Novel Theanine Complex, Mg-L-Theanine Improves Sleep Quality via Regulating Brain Electrochemical Activity. Frontiers in Nutrition 9 (April 2022).
