L-theanine supplements could interact with some anti ... Tea's combination of caffeine and L-theanine can give you a calm yet ...

Know that caffeine supplements may not provide the same beneficial compounds you might get from natural sources. L-theanine, which is a compound that is helpful for attention, can be found in ...

Medically reviewed by Melissa Nieves, LND L-theanine benefits may include helping you relax, de-stress, and sleep better.