While L-theanine isn’t essential for our survival, its presence in plants and fungi has been studied for its possible impact on our brain function. Few plant foods contain vitamin D, so it can be difficult for people following vegetarian or vegan diets to get enough vitamin D from the diet alone.

Also, 200 mg of L-theanine was shown to help reduce resting heart rate, pointing to its ability to promote relaxation ( 16). Scholey. A., Gibbs. A., et al. (2014). Anti-Stress Effects of Lemon Balm-Containing Foods. Nutrients. 6(11), 4805-4821.Most known for helping people relax, L-theanine has other potential health benefits, including: Anxiety and stress relief A randomized trial from 2019 found that healthy adults who took L-theanine over the course of four weeks had a decrease in stress-related symptoms. While these results are promising, it’s important to remember that stress reduction will look different for everyone, depending on what stress response you’re having and when you’re experiencing it. Boosting mental clarity Weydert JA. Recurring abdominal pain in pediatrics. In: Integrative Medicine. Elsevier; 2018:457-465.e2. doi:10.1016/B978-0-323-35868-2.00045-1 Help maintain a healthy weight: l-theanine may not help you lose weight directly. However, the relaxation qualities and ability to maintain stress levels, along with a healthy balanced diet can protect against weight gain. L-theanine encourages relaxation and supports sleep by facilitating several changes in the brain. Results from animal studies have shown that L-theanine increases levels of the neurotransmitters gamma-Aminobutyric acid (GABA), serotonin and dopamine — compounds that work to regulate mood, emotion and sleep. ii By increasing levels of these soothing brain chemicals, L-theanine may therefore also support sleep in humans.

Harvard Medical School Health Publishing, Harvard University. Harmful effects of supplements can send you to the emergency department.

What is theanine serene used for?

Two of our high-performance Theanine and Lemon Balm tablets contain the same 200mg of L-theanine – found in our original supplement – but with the addition of 600mg of Lemon Balm (Melissa). To L-theanine and Lemon Balm, we added biotin for the normal function of the nervous system and normal psychological function, as well as pantothenic acid for normal mental performance. Sipping on a hot cup of tea can help you feel at ease, and research suggests that it not only relaxes the mind, but it also does so without causing drowsiness ( 1). Yoto. A., Motoki. M., Murao. S., et al. (2012). Effects of L-theanine or caffeine intake on changes in blood pressure under physical and psychological stresses. J Physiol Anthropol. 31:28.