L-Theanine is a naturally occurring amino acid found in green tea, with the ability to cross the blood-brain barrier. Theanine has been shown to be responsible for the calmative effects of Green Tea, which are known to induce a relaxed but alert state.
This resulting calmative state without sedation is what makes L-Theanine such a popular nootropic to combine with stimulants due to the “flow state” that results. Since it easily crosses the blood-brain barrier, it works quickly to increase dopamine and serotonin. The “feel good” chemicals in your brain.
L-Theanine is an amino acid that impacts nerve impulses in the brain and the release of neurotransmitters, including GABA.
Benefits may be as follows:
- Improve memory & cognition
- reduce stress & anxiety
- Supports mood & relaxation
- Improve mood & sleep
- Lower blood pressure
- Assist in weight loss
- Anxiety, depression, and other mood-related disorders
- Insomnia and trouble sleeping
- Cognitive loss, dementia, and Alzheimer’s disease
- High blood pressure and other cardiovascular problems
- Post-traumatic stress disorder (PTSD)
- Poor attention span
- Substance dependence
- It may help improve the effects of drugs used to treat cancer drugs
- L-theanine may also help boys diagnosed with attention deficit hyperactivity disorder (ADHD) sleep better.
If you haven’t recently eaten when taking L-theanine, you may feel the effects a bit more quickly and intensely (similar to drinking caffeine with a meal versus on its own/on an empty stomach). If you’re using it to help you sleep, try taking it about 30–60 minutes before bed.
L-Theanine modulates the activity of several antitumor drugs and has been reported to stimulate the self-renewal of human embryonic stem cells. L-Theanine binds to AMPA, Kainate, NMDA, and group I mGlu receptors.