What are the side effects of taking L-Theanine?

is generally considered safe for most people and has various benefits, such as promoting relaxation and improving sleep quality. However, there are some side effects and considerations to keep in mind:

1. Sleepiness: L-Theanine can enhance sleep quality and depth, making some people feel excessively sleepy. This effect can be more pronounced when combined with other supplements like magnesium 1.

2. Vivid Dreams: Some individuals experience intense or vivid dreams, which can lead to waking up in the middle of the night. This is more common for those taking L-Theanine in higher doses or before bed 1.

3. Reduced Alertness: L-Theanine can blunt some of the excitatory effects of caffeine and may reduce overall alertness if taken in high doses (up to 900 mg per day, although such a high dosage can increase sleepiness) 2.

It's always advisable to consult with a healthcare provider before starting any new supplement, especially if you have existing health conditions or are taking other medications.