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L-Theanine

L-Theanine is a non-protein amino acid, predominantly found in green and black tea. It is most well-known for its anti-anxiety effects in the nervous system [1]. Clinical studies have also shown its positive effect in regulating central nervous system disorders due to its anti-stress and neuroprotective role in the example of dementia[2].


L-Theanine is mostly used as support for stressful situations to calm the nervous system but at the same time allowing focus and cognitive function. For example, in a 2006 study looking at exam situations, the anti-stress effects of L-theanine were assessed in a laboratory setting using a mental arithmetic task as an acute stressor. The results showed that L-Theanine intake resulted in a reduction in the heart rate (HR) and salivary immunoglobulin A (s-IgA) responses to an acute stress task relative to the placebo control condition[3].


L-Theanine has also shown promise when researched in relation to Parkinson’s Disease. The neuroprotective effects of L-theanine can be attributed to its structural analogy with glutamate, the main excitatory neurotransmitter in brain. It seems to have potential to ameliorate the pathophysiological changes associated with Parkinson's disease as it displays antioxidant and anti-inflammatory properties, improves motor behavioral abnormalities and increases dopamine availability[4].


Due to the calming effects of L-theanine, it is often recommended in a clinical situation alongside other herbs such as Lemon Balm and nutrients such as vitamin C. It may be used in short term situations of heightened stressors for quick effect such as support when giving presentations, if nervous about flying or other times where the body is pushed out of its comfort zone as well as longer term use where stressors can be more chronic.

Recommended For

Stress , Anxiety , Brain Health

Explore products containing L-Theanine

0953 Viridian

Green Tea 500mg

£7.55
- £17.90
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0021 Viridian

L-Theanine And Lemon Balm

£16.66
- £33.40
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