Hello! Caffeine can give you a boost of energy, but caffeine mixed with L-Theanine has a different reaction. Here is a great breakdown: https://hvmn.com/blogs/blog/supplements-caffeine-and-l-theanine-the-best-combo-for-energy

Essentially, by combining the two, you get calm and focused attention rather than jitters; there have been studies that suggest it even improves cognition!