A lot of people who take L-Theanine with Caffeine are taking it at a higher dosage than what you can from even a few cups of tea.

I’ve read about this combination quite a bit and from my personal experience, you have to get the mixture just right. Even at high doses of caffeine, the right amount of L-Theanine can stop the jitters and give a calm focus. That all said, these dosages are so individualistic that it’s chasing a dragon.