By Dr. Keri Marshall
What if Feeling Calm and Staying Focused Didn't Have to Be Opposites?
We often think of relaxation and focus as two completely different states of mind. When you need to concentrate, a lot of people reach for caffeine. When you want to relax, you step away from the task, and most definitely don’t reach for caffeine. But what if there were a way to support a calmer state of mind while still staying mentally focused and engaged without using caffeine?
Enter L-Theanine.
L-Theanine is a naturally occurring amino acid found primarily in the leaves of tea (Camellia sinensis) including Black and White Tea but is especially high in Green Tea. It has attracted significant scientific interest because of its potential effects on different parts of the body that help regulate relaxation, attention, the stress response, mood, and cognitive performance including normal levels of focus and attentiveness. While research is still evolving, there is a growing body of human clinical research that supports why L-Theanine has become such an interesting ingredient for people looking for both a calmer state of mind and mental alertness and focus.
This is exactly why we formulated Chomp CALM gum to include 100mg of L-Theanine per piece of gum. Most clinical research has shown clinical effectiveness at a dose of 100 and 200 mg. That means chewing as little of one piece of CALM gum will give you the dose used in many clinical studies. Two pieces of CALM gum will give you the higher dose (200mg) used in other clinical studies. Safety wise, it is not recommended to consume more then 400mg of L-Theanine a day – which is equal to 4 total pieces of CALM gum a day.
What Exactly Is L-Theanine?
L-Theanine is a unique non-protein amino acid naturally found in the leaves of Camellia sinensis, the plant used to make Tea - Green, Black, White, and Oolong.
Unlike many amino acids that are incorporated into proteins, L-Theanine is different in that it exists as a free amino acid. Research suggests that it is absorbed both through oral consumption and through the gut, and can also cross the blood-brain barrier, allowing it to interact with processes involved in brain function and health. This may help explain something tea drinkers have experienced for centuries: that distinctive feeling of being alert, yet relaxed.
Tea naturally contains both caffeine and L-theanine. Caffeine can promote alertness and attention on its own, however caffeine comes with many side effects and downsides too, especially when taken in excess throughout the day. As for L-theanine, it appears to influence the brain through completely different mechanisms.
The Natural Source: Green Tea
If you want to find L-theanine in nature, start with Green Tea; its where it’s found in highest concentration naturally. Tea has been consumed for thousands of years, with historical records tracing its use in China back more than 4,000 years. Tea eventually spread throughout Asia and became deeply integrated into Japanese culture. During the Tang Dynasty (618–907 CE), tea became increasingly established as a widely consumed beverage in China rather than simply a medicinal preparation. Tea eventually made its way to Japan, where Buddhist monks incorporated it into their daily practices. Monks famously used tea to help them stay awake and focused during long periods of meditation and prayer.
We now know that caffeine was only a part of that equation - but it certainly wasn't the whole story. Research has shown that L-Theanine on its own contributes to the unique combination of alertness and relaxation associated with tea. That combination is precisely what makes L-theanine so interesting today.
How Does L-Theanine Work?
This is where things get particularly interesting. L-Theanine influences several neurotransmitter systems and pathways involved in brain function. Research has investigated its effects on GABA, Glutamate, Dopamine, Serotonin, and other signaling systems in the brain, although the precise mechanisms in humans are still being worked out.
Researchers have also studied L-Theanine's effects on brain-wave activity. One of the most interesting findings is its relationship with Alpha brain-wave activity. Alpha waves are commonly associated with a relaxed but alert state of mind.
In one double blind controlled study, a 200 mg dose of L-Theanine increased alpha-wave activity during a stressful situation and was associated with a reduction in salivary cortisol when compared with a placebo. This helps explain why L-theanine is often described as supporting relaxed attention rather than sedation. L-Theanine is definitely non-drowsy while at the same time producing a state of calm.
The goal isn't to turn your brain off. It's to potentially help take the edge off while keeping you mentally engaged.
Can L-Theanine Help With Stress?
This is one of the most studied reasons people take L-Theanine. Several clinical studies have examined whether L-Theanine can influence subjective stress and the body's physiological response to stressful situations. The results are promising, although studies vary in their design, dose, duration, and participant populations.
A 2026 systematic review and meta-analysis examined 31 randomized controlled trials involving a total of 1,168 participants. The researchers found evidence for a significant short-term benefit in attention, and they also identified potential beneficial effects on stress and mood. The authors emphasized, however, that more high-quality research is needed for some of these outcomes.
That's an important distinction. L-Theanine should not be viewed as a treatment for anxiety, depression, or another medical condition. Instead, the research suggests that it may be useful as part of a broader approach to supporting relaxation, attention, and a healthy response to everyday stress.
L-Theanine and Focus: Calm Doesn't Have to Mean Sleepy
One of the most fascinating aspects of L-Theanine is its relationship with attention.
Research has particularly explored L-theanine in combination with caffeine because of the combo found in green tea. A systematic review of clinical trials found that the combination can improve several measures of attention and cognitive performance, although more recent research has started looking at L-Theanine on its own, and finding more benefit alone, not with caffeine.
The 2026 meta-analysis of randomized controlled trials found a significant short-term benefit for attention in healthy adults compared with placebo. The researchers specifically identified improvements in certain measures of reaction time following L-Theanine alone intake.
This is important because modern life doesn't always require more stimulation. Sometimes we don't need to be more energized. We need to be less distracted. We need to quiet some of the mental noise so we can focus on what's right in front of us. That's the idea behind a sense of calm focus.
How Much L-Theanine Has Actually Been Studied?
When evaluating any functional ingredient, one of the most important questions is simple:
What is the dose that has actually been used in human clinical research?
For L-Theanine, human studies have commonly examined doses in the 100–200 mg range, with 200 mg being particularly well studied for attention, focus, stress response, and relaxation related outcomes.
100 mg: Supporting Attention and Focus
Controlled research has examined doses as low as 100 mg and as high as 400mg.
In a double-blind, placebo-controlled crossover study, researchers compared 100 mg, 200 mg, and 400 mg of L-Theanine with placebo in healthy adults.
Both 100 mg and 200 mg significantly improved simple reaction time compared with a placebo, although the effects were not consistent across every cognitive test.
This suggests that L-theanine can influence certain aspects of the brain when it comes to attention, even at a relatively modest dose.
200 mg: A Well-Studied Clinical Dose
The 200 mg dose has been used repeatedly in human clinical trials, making it particularly relevant when discussing L-Theanine usage.
In a randomized, double-blind, placebo-controlled crossover study, 30 healthy adults consumed 200 mg of L-Theanine daily for four weeks.
Researchers observed improvements in several measures related to stress, mood, sleep quality, and cognitive function. Participants also demonstrated improvements in measures of mood and stress, sleep-related outcomes, verbal fluency, and executive function compared with placebo. Importantly, no significant adverse events were reported during the study.
Another randomized, placebo-controlled study investigating a single 200 mg dose and found that L-Theanine increased alpha-wave activity during an experimentally induced stress situation. Researchers also observed a greater reduction in salivary cortisol one hour after L-theanine compared with placebo.
This means chewing TWO pieces of CALM gum to get 200mg of L-Theanine, although many people report they need just one to help manage stress.
What Does the Overall Clinical Research Tell Us?
When we step back and look at the body of research rather than one individual study, the picture becomes even more interesting. In 2026 a systematic review and meta-analysis of 31 randomized controlled trials with 1,168 participants was conducted that evaluated L-Theanine's effects on stress, mood, attention, and cognition.
For short term brain and cognitive effects, the researchers found that a single 200 mg dose taken 30–60 minutes before testing significantly improved choice reaction time. The researchers also found evidence suggesting a modest reduction in acute stress, although they noted that the evidence for some stress outcomes was less certain because of methodological limitations in some of the studies. Importantly, the review did not establish that L-Theanine is a treatment for anxiety, depression, or other clinical disorders.
The science is better described as supporting the potential role for L-Theanine in helping with calmness, attention, and everyday stress response. For many people this is much more meaningful. There are very few tools that exist to help people manage stress.
Why 100–200 mg Is an Important Range for L-Theanine
The clinical research gives us useful context when thinking about L-Theanine supplementation. The amount of L-Theanine naturally found in a cup of tea is generally much lower than the doses used in many clinical studies. Estimates vary considerably depending on the type of tea, growing conditions, processing, and preparation, but a typical cup may contain only a few tens of milligrams.
Clinical studies, on the other hand, frequently investigate 100–200 mg or more. That doesn't mean that "more is better." It means that researchers are studying concentrated amounts of L-Theanine to better understand its potential effects. This is one of the reasons functional delivery formats, like chewing gum, are so interesting and important.
You can and should absolutely enjoy Green Tea as a natural source of L-Theanine, because Green Tea has a multitude of other important phytonutrients and antioxidants. However obtaining the amounts commonly studied in clinical trials through tea alone would require considerably more concentrated intake.
Why Put L-Theanine in Chewing Gum?
At Chomp Gums, we believe the delivery format matters. Supplements are often associated with capsules, powders, or beverages. But for most people, your day doesn't always happen next to a kitchen, shaker bottle, or glass of water.
Sometimes you're driving.
Hiking.
Working.
Traveling.
Studying.
Heading into a meeting.
Or simply trying to reset in the middle of a hectic afternoon.
This is where chewing gum offers something uniquely different.
Chomp Calm gum combines the simple act of chewing gum with functional ingredients selected for moments when you want to feel more centered and focused.
Our Calm gum contains L-Theanine and Vitamin B6, bringing together ingredients designed to complement a calm and focused approach to every day life in a convenient, portable format.
No mixing.
No water.
No pill to swallow.
Just chew.
And Don't Forget the Chewing
There's another interesting piece to the CALM equation, and chewing gum in general: the act of chewing itself.
Chewing isn't simply a way to deliver flavor. Research has explored the relationships between chewing, attention, alertness, mood, and cognitive performance showing a positive correlation to chewing gum. That makes gum a particularly interesting delivery system for functional ingredients designed around mental performance and everyday well-being. You're not just taking an ingredient. You're engaging in an activity.
And that's very much the Chomp philosophy:
Chew Your Way to Good Health
L-Theanine: From Ancient Tea to Modern Functional Nutrition
There is something pretty remarkable about L-Theanine. For centuries, people have turned to tea as part of rituals centered around reflection, focus, conversation, and contemplation. Modern science is now investigating the compounds found in tea that may contribute to those experiences. We don't completely understand every mechanism yet and science shouldn't pretend that we do.
What we do know is that L-Theanine is a unique amino acid that can cross the blood-brain barrier and has been studied in humans for its potential beneficial effects on attention, relaxation, stress response, and cognitive performance.
And importantly, 100–200 mg isn't an arbitrary dose range.
That's what makes L-theanine so interesting. It's not about making you drowsy to calm down. It's not about artificially stimulating you with caffeine. It's about exploring the possibility of feeling calm without sacrificing focus and not getting the caffeine jitters. The body does not need more caffeine, but it does need more Calm.
Meet Chomp Calm
Chomp Calm is functional gum designed for those moments when you want to slow down without stopping. With L-Theanine and Vitamin B6, Chomp Calm gum gives you a convenient way to incorporate functional ingredients into your everyday routine. Whether you're sitting down to focus, heading into a busy afternoon, traveling, working, studying, or simply looking for a moment of calm, Chomp Calm fits into your day without slowing you down.
Because sometimes you don't need another cup of coffee.
You don't need to check out.
You just need to take a breath, chew your gum, and get back to what matters.
Calm your mind. Keep your focus. Keep moving forward.
Scientific References
- Dodd FL, Kennedy DO, Riby LM, Haskell-Ramsay CF. Psychopharmacology. 2015 Jul;232(14):2563-76.
- Foxe JJ, Morie KP, Laud PJ, Rowson MJ, de Bruin EA, Kelly SP. Neuropharmacology. 2012 Jun;62(7):2320-7.
- Gerolymos C, Saddier E, Boyer L, et al. Molecular Psychiatry. 2026.
- Hidese S, Ogawa S, Ota M, et al. Nutrients. 2019;11(10):2362.
- Kimura K, Ozeki M, Juneja LR, Ohira H. Biological Psychology. 2007;74(1):39–45.
- Türközü D, Şanlier N. Crit Rev Food Sci Nutr. 2017 May 24;57(8):1681-1687.
- Williams JL, Everett JM, D'Cunha NM, et al. Nutrients. 75, 12–23 (2020).