L-Theanine is an amino acid found almost exclusively in tea that influences the central nervous system through a number of mechanisms. It crosses the blood-brain barrier in a dose-dependent manner within 30 minutes, and influences levels of the neurotransmitters dopamine, gamma-aminobutyric acid (GABA), serotonin, norepinephrine, and glutamate. These effects cause a significant increase in alpha brain wave activity, indicative of a state of wakeful relaxation, increased performance under stress, improved learning and concentration, as well as decreased anxiety.
Studies also suggest that L-theanine may have neuroprotective properties against brain injury, such as that resulting from stroke, as well as from environmental neurotoxins. L-Theanine’s neuroprotective capacity has been attributed to its effects on N-methyl-D-aspartate (NMDA) receptors, and brain-derived neurotrophic factor (BDNF) and glial cell line-derived neurotrophic factor (GDNF) production. Because it reduces levels of norepinephrine, it has also been shown to have a hypotensive effect. In clinical trials, L-Theanine has been shown to buffer sympathetic activity during stressful events, reducing subjective as well as physiological stress responses.
Unopened supplements may be returned to the clinic within 30 days of purchase for a full refund. We do not offer refunds for return shipments.
No refunds for the following once shipped
- omega fatty acids
- food products such as protein powders
Custom blended tinctures
Due to the nature of custom blended tinctures, we cannot offer refunds once purchased as they cannot be restocked.