Best L-Theanine Brand For Anxiety


Jan 26
best l theanine brand

Theanine (l-theanine) is an amino acid and antioxidant found in several types of plants and fungus, but most commonly in green tea.

It’s known for its ability to relieve stress and anxiety.

Theanine also works synergistically with caffeine to improve cognitive function. Suntheanine is a branded form of theanine that has the same overall health benefits.

The average Japanese tea drinker consumes only 20 mg of l-theanine a day. Most theanine studies used a minimum of 200 mg before noticing benefits.

Aside from relieving anxiety, theanine supplementation can help treat insomnia and improve immune system function.

In the rest of this article, we’re going to discuss why theanine supplementation is worth trying if you have anxiety, depression, or need an overall cognitive boost.

Then, we’ll look at the best l-theanine brand for anxiety. Not all supplements are created equal. Some are garbage. None are perfect. The theanine products featured in this article are a great place to start. 

Our Top Pick For Best L-Theanine Brand

Pure Encapsulations is our top pick for best l-theanine brand. As a company, they’re hard to beat, and they end up in our “top five” lists a lot. The reason is that they’re a well-established company that pursues new developments and continually improves quality standards. Their standards well-exceed those put in place by the federal government on most accounts.

Theanine Benefits

  • Reduces Anxiety
  • Improves Focus
  • Improves Sleep Quality
  • Reduces Depression
  • Strengthens the Immune System

Theanine Lowers Anxiety

Theanine is an effective natural anxiety remedy. At least that’s been the conclusion of several recent studies. Scientists think that theanine induces feelings of calm by increasing alpha brain waves.

Theanine is also reported to increase the GABA, serotonin, and dopamine. Evidence suggests that theanine may reduce the expression of glutamate by binding to glutamate receptor sites. Glutamate is an excitatory neurotransmitter.

Supplementing with theanine can lower anxiety by increasing alpha brain waves and reducing the expression of glutamate. Glutamate is an excitatory neurotransmitter. When glutamate is hyperactive anxiety can get worse.

Some people find that drinking green tea before bed reduces anxiety helps them sleep better. This is due in part to the high theanine content in green tea.

Theanine Can Improve Focus

In a 2013 study, participants reported an increased ability to focus when combining theanine with a low dose of caffeine. The study administered 97 mg of theanine along with 40 mg of caffeine. 97 mg is roughly half the dose recommended by the best l-theanine brand.

40 mg of caffeine is approximately half what's in a cup of coffee. Participants demonstrated faster reaction times, faster numeric memory, and improved sentence verification accuracy.  

Theanine supplementation is proven to increase BDNF. BDNF is a protein that does a lot of heavy lifting in the brain. It’s critical for building new synaptic connections between neurons. This makes BDNF critical for learning and executing tasks. BDNF also keeps existing synaptic connections healthy (prevents brain degeneration).

Theanine And Sleep

Better sleep is one of the biggest steps you can take towards a healthier you. If you struggle to get a good night’s sleep, supplementing with theanine can help you sleep more soundly.

Theanine is especially effective at helping children diagnosed with ADHD get a better night's sleep. (R)

Theanine May Reduce Depression

In a recent study, theanine supplementation reduced symptoms of depression in patients with major depressive disorder. 

Participants who supplemented with theanine for eight weeks reported increased overall cognitive function in addition to less depression. (R)

Theanine May Improve Immune Function

More research still needs to be done in this area, but early studies indicate that theanine may strengthen the immune system by lowering inflammation in the digestive tract. (R)

Another study indicates that theanine may reduce that risk of respiratory tract infection. (R)

Other Potential Benefits Of Theanine 

  • Weight Loss (R) 
  • Heal Stomach Ulcers
  • Hearth Health
  • Cancer Treatment
  • Sinusitis Relief

How To Brew Tea To Increase Theanine Content

The longer you brew your tea, the higher the theanine content will be. Black tea, like pur-erh tea, is green tea that has turned black from fermentation. Black tea has a higher theanine content as a result of being fermented. (R)

Theanine Dosage

The Natural Standard is an international research organization that evaluates the recommended dosages of supplements. They recommend 200-250 mg for a single dose of l-theanine with a maximum daily limit of 1,200 mg.

Suntheanine vs L-Theanine

Suntheanine was developed by green tea producer Taiyo International, Inc. N

o conclusive evidence exists to support that Suntheanine is a more effective form of l-theanine. In short, Suntheanine vs  l-theanine is a matter of preference.

The difference between the two is that suntheanine has had the d-theanine component removed. Taiyo International claims that d-theanine inhibits the body’s absorption of theanine. No conclusive evidence exists to support this claim.

However, companies that choose to use Suntheanine vs l-theanine tend to be of better overall quality. Companies know that Suntheanine is starting to be viewed by the public as a marker of quality, despite the lack of evidence.

Profitable companies that are savvy with marketing have begun switching to Suntheanine because it's now a hot keyword that increases sales.

How We Evaluate For Best L-Theanine Brand

These are the best l-theanine brand that we'd recommend to family and friends. This is not a complete list. Other stellar theanine supplements are probably out there. We just haven't run into them.

To make the Dope.Fresh.Fit. top five, a product needs to be made with the highest quality standards and be involved in, or at least up-to-date on, the science behind their product. We call these companies when they fall short.  

All of the theanine supplements you're about to see are third-party tested and operate under the jurisdiction of the Federal Drug Administration.

Best L-Theanine Brands For Anxiety

Pure Encapsulations Is Our Top Pick Best L-Theanine Brand

Pure Encapsulations makes hypoallergenic supplements in dedicated allergen-free facilities. Although the use of suntheanine isn’t part of our evaluation process, it’s worth mentioning that Pure Encapsulations uses the suntheanine form.

As a company, their standards are more rigorous than the FDA. Every morning they disassemble and sterilize all of their machinery to reduce the chances of cross-contamination. If you want to avoid stearates, binders, fillers, artificial flavors and colorings, Pure Encapsulations makes an excellent product.

Natural Factors: #2 Best L-Theanine Brand

I have to admit, I have a soft spot for this company. They first won me over with their GABA supplements. I’ve tried five different brands of GABA, and their chewable version worked well and had a fast onset. I wasn't surprised when their theanine was just as effective.

As a company, Natural Factors provides the same level of quality as Pure Encapsulations. They’re deeply involved in continuing research and boast some of the most advanced onsite manufacturing and packaging facilities in North America.

Sports Research: #3 Best L-Theanine Brand

Sometimes you have to give the new kid on the block a chance. Sports Research is a family-run company. Although the use of suntheanine isn’t clinically proven to provide better results, I think it’s commendable that they took the step to use it in their product.

The general hype in the supplement world is that suntheanine is a superior form of theanine. The fact that they opted to use it shows that they care about separating themselves from the competition. 

Their theanine is also non-GMO and uses cold-pressed coconut oil. Sports Research claims that the coconut oil allows the theanine to be absorbed more easily. I couldn’t find any research to support this, but it’s entirely plausible. Theanine is fat-soluble, so it makes sense that coconut oil could aid absorption. Kudos to this new company for being a top five best l-theanine brand.

Thorne: #4 Best L-Theanine Brand

Thorne has been producing high-quality supplements for several decades. As a company, they cater best to people who are trying to avoid GMO ingredients and the use of unnecessary fillers and binders.

Thorne also prioritizes reducing allergen exposure risk as much as possible. Deciding between Thorne, Natural Factors, and Pure Encapsulations is a toss-up if you aren't concerned about allergen exposure. If you are, Pure Encapsulations is the best choice.

Solaray: #5 Best L-Theanine Brand

Solaray has been around even longer than Thorne. Their naturally favored lemon-lime chewable l-theanine is delicious. With that said, if you're looking for the best chewable variety, I have to direct you to Natural Factors. Their chewable l-theanine is something I’d eat for a snack it tastes so good. Both brands’ products are sugar-free.

Solaray is a company I trust but rarely buy. They’re dependable and trustworthy but tend to be a little behind the times are far as ingredients go. For instance, they use magnesium stearate, which can damage the skin and promote liver toxicity at extremely high doses. The amount used in Solaray's theanine is negligible but still worth pointing out.


Research shows that theanine can make a big impact on reducing anxiety and improving cognitive function. Theanine behaves similarly to GABA in the brain and for many people does an even better job of reducing anxiety.

Research shows that theanine can make a big impact on reducing anxiety and improving cognitive function. Theanine behaves similarly to GABA in the brain and for many people does an even better job of reducing anxiety.

Add theanine to your supplement routine if you struggle with stress, anxiety, or want to get a better night’s sleep. I combine theanine with my favorite fidget toys when I need to calm down and focus.