Light Speed

Can't pick a lane? Don't. 10 lozenges, Crystal Fresh Mint and Cold Brew Coffee stacked side by side in one tray. One dose, no cup, no crash in two flavors so you never get bored.

The bold one. 10 lozenges of pure Cold Brew Coffee, lined up and ready to dissolve. No pills, no drinks, no fillers just the flavor that hits like your favorite drive-thru order, minus the drive-thru.

Cold and clean. 10 lozenges of Crystal Fresh Mint, dosed to hit fast and clear your head. This is the flavor for people who want their focus without the sugar rush.

You know the drill by now. 20 lozenges, Crystal Fresh Mint and Cold Brew Coffee mixed in one box for whoever's not ready to commit to just one. Built for the people who go through these fast.

For the ones who already know Cold Brew Coffee is the move. 20 lozenges, one flavor, zero hesitation. Stock up once, skip the refill panic.

We examined the acute effects of l-theanine, caffeine and their combination on sustained attention, inhibitory control and overall cognition in boys with attention deficit hyperactivity disorder (ADHD). The study found that the l-theanine–caffeine combination may be a potential therapeutic option for ADHD-associated impairments in cognitive performance.

This study investigates the acute effects of combined and isolated caffeine and theanine supplementation on physical and cognitive performance in competitive athletes. It highlights the importance of both physical capacity and cognitive functions such as decision-making and attentional control in modern athletic performance.

Learn about the physiological benefits of using caffeine for optimal mental and physical performance, from how much you should take to when best to have it.

Learn how much is too much when it comes to caffeine and the hidden sources you may not know about.