From the Research
L-theanine may help reduce palpitations in some individuals by decreasing anxiety and stress, which are common triggers for heart palpitations, as suggested by the most recent and highest quality study available 1.
Key Points to Consider
- L-theanine is an amino acid found in green tea leaves, known for its calming properties and potential to reduce stress and anxiety.
- Typical dosages range from 100-400mg daily, with many people finding benefit at 200mg taken once or twice daily.
- The mechanism of action involves increasing levels of GABA, serotonin, and dopamine in the brain, promoting relaxation without sedation, as noted in a study published in the Journal of Physiological Anthropology 2.
- L-theanine may also reduce the body's physiological stress responses, potentially lowering heart rate and blood pressure during stressful situations, as indicated by a study in Biological Psychology 3.
- While generally considered safe with few side effects, it is crucial to consult with a healthcare provider before trying L-theanine, especially if you have existing heart conditions or take medications, as advised in a review published in Nutrition Research 1.
Important Considerations
- The evidence supporting the use of L-theanine for reducing palpitations is limited but suggests potential benefits in reducing stress and anxiety, which can contribute to heart palpitations, as discussed in a systematic review published in Plant Foods for Human Nutrition 1.
- L-theanine should be viewed as a potential complementary approach rather than a primary treatment for heart palpitations, which may have underlying medical causes requiring proper diagnosis and treatment, as cautioned in a study published in Pharmacological Research 4.
- Further research is needed to fully understand the effects of L-theanine on heart health and to establish clear guidelines for its use, as highlighted in a recent review published in Nutrition Research (New York, N.Y.) 5.