Best L-Theanine Supplement Brands – Our Top 12 List

In 1949 researchers found an important constituent of Green Tea leaves (Camellia sinensis) known as L-Theanine. This is a non-dietary amino acid, primarily known to help you relax without growing sleepy because it’s typically paired with caffeine. However, it does help promote healthy sleep cycles, stress levels, overall well-being, cognitive functioning, and focus. As with any other supplement, some brands do work better than others. With this in mind, here are some brands we recommend.

1. Absorb Health

These L-Theanine capsules contain 200 mg of pure L-Theanine per capsule. This is a large dose, but that’s good for anyone who’s looking to remain calm while staying focused. Since it comes from a high-quality vendor, with a good, long reputation, you know this is a brand you can trust. In fact, founder, Josh Fulton founded this company when his wife got sick and he decided to search for natural remedies for restoring her health. This same passion still motivates everything the Absorb Health brand does today, which is why so many people have placed their trust in it.

2. Nootropics Depot

This all-natural Amino Acid has been shown to boost your focus without making you feel jittery. For this reason, it comes highly recommended for anyone who’s just starting to take this supplement. It will help you feel relaxed (without having any sedative effects) so that you can focus better.

Make sure you take it with your first cup of coffee in the morning though because this helps combat the coffee’s negative effects, leaving you with a clean form of enhanced energy that also enhances your cognitive function. This core synthetic process is something the nootropic industry has been known for since its inception.

3. NOW Foods

Whether you’re a vegetarian or a vegan, this 200 mg L-theanine pill offers you an effective dosage. It’s also fortified with 100 mg of inositol which is a vitamin-like substance. Naturally, it’s found in citrus fruits, beans, and whole grains. Inositol is also approved as a dietary supplement.

The manufacturer, NOW Foods, is an all-natural dietary supplement producer that’s been in business since 1968. You’ll appreciate their affordability and commitment to green, philanthropical business. These are just a few of the many reasons why people enjoy this brand.

4. Country Life

For a high-quality, gluten-free, vegetarian L-Theanine capsule, choose the Country Life brand. This 200 mg pill is also fortified with 5 mg vitamin B6, which helps supports adrenal function and a healthy nervous system. The company is known for using clean, fresh, authentic ingredients so their products are more accurate and consistent. In other words, there aren’t any hidden ingredients in this pill.

5. Doctor’s Best Suntheanine L-Theanine

This is a pure, 150 mg L-theanine pill that gives you a high-quality dosage inside of a vegetarian capsule. It’s made out of a combination of cellulose and rice powder, without any harmful additives or preservatives. Doctor’s Best uses a patented fermentation process that also helps enhance the pill’s efficacy and potency even more. These are things people have simply come to expect from this company though.

Founded in 1990, the company is known for conducting rigorous testing to make sure all of their products meet their high-quality standards. All of these products are made in facilities that are GMP certified.

6. Source Naturals L-Theanine

Source Naturals fortifies their 200 mg L-Theanine supplement with 76 mg of calcium. This is an essential mineral that’s known to support bone strength and density. When calcium is combined with L-theanine you not only reap L-Theanine’s support for good mental health, cognitive functioning, mental relaxation, physical relaxation, deeper sleep quality, and stress reduction, but you also reap calcium’s benefits as well. These include building and maintaining strong bones; helping your heart, muscles, and nerves function properly; and protecting you against diseases like cancer, diabetes, and high blood pressure.

While all of this sounds great, many people don’t like that this brand contains more additives and fillers than other brands on the market today. Nevertheless, founded in 1982, Source Naturals is one of the leaders in today’s wellness revolution. They truly want to help people reach their optimal state of health and well being. This has led them to become one of the first supplement brands to combine a variety of nutrients, herbs, and nutraceuticals into a single formulation.

7. Solaray L-Theanine

With Solaray’s L-Theanine formula you receive a combination of 200 mg L-theanine and 100 mg green tea leaf. Since L-theanine is the predominantly active ingredient in green tea and one of the main reasons why green tea has so many health benefits, this combination is quite powerful. You not only receive L-Theanine’s holistic benefits but you also reap benefits from the green tea that include additional antioxidants and polyphenols.

The company behind this proprietary combination was founded in 1973 in Utah. Solaray has helped pioneer the concept of encapsulated herbal blends. Today, they’re a well-known brand in the health food industry with more than 1,000 different products available — including herbs, herbal extracts, vitamins, minerals, amino acids, fatty acids, probiotics, and enzymes.

8. Pure Encapsulations L-Theanine

When you want a pure 200 mg L-Theanine supplement that’s also hypoallergenic, Pure Encapsulations L-Theanine vegetarian supplement has you covered. While it does contain a few other ingredients, it uses a patented form of L-theanine known as suntheanine. This is formed through a fermentation process that enhances its efficacy and potency. All of this is hypoallergenic because it’s vegetarian.

Since it’s combined with green tea, you also reap its lasting health benefits. The L-Theanine is encapsulated by the green tea so you gain the green tea’s health benefits in a more concentrated and easily consumed form.

Manufactured by Pure Encapsulations, a company that assumes a minimalist approach for dietary supplementing. This means that it avoids harmful additives such as sweeteners, fillers, colors, and coatings. They also research their products so they can give you predictable results you want.

9. Solgar L-Theanine

When you want 150 mg of L-Theanine in a pure form that’s encapsulated in a vegetable capsule, you should check out Solgar’s pill. It uses suntheanine, which is the fermented form of L-theanine. This means your body can absorb and assimilate it better.

Unfortunately, some people say that there are a lot of fillers in it. However, other people do say that it works well for promoting mental and physical relaxation, enhancing cognitive function, and supporting your cardiovascular and mental health.

Made by Solgar, which is a brand that’s known for producing high-quality vitamins, supplements, and herbs this is a supplement you can trust. This is because they conduct a lot of scientifically based
research in regards to their ingredients. The brand itself has been around since 1947, working out of their state of the art manufacturing facilities, which have high-quality controls and a USP water purification system.

10. Thorne Research Theanine

Another, basic, pure form of L-Theanine is made by Thorne Research. This 200 mg dosage comes in a vegetarian pill. There’s no soy, corn, dairy, egg, peanuts, GMOs, yeast, sugar, magnesium stearate, binders, coatings, artificial colors, flavors, or sweeteners in it.

Thorne Research, the manufacturer of this L-Theanine formulation is well-known because they’ve been in this industry for more than 30 years near. They’re truly dedicated to enhancing their customers’ health and well being. This is because they’re known for providing high-quality, innovative, research-based nutritional supplements.

11. Sports Research Suntheanine L-Theanine

Sports Research formulates their 200 mg L-Theanine pills through a combination of suntheanine and virgin coconut oil. They then encapsulate them in a liquid soft gel so it’s quickly released into your body where it’s absorbed better. All of this is actually quite Kosher, but some people do say that these pills are difficult to swallow.

The family who runs this company has put a lot of thought, time, hard work, and dedication to creating a high-quality product that only uses heavily researched ingredients. They then manufacture and package everything in GMP certified facilities. Throughout the entire process, they test every batch of ingredients so they’re sure of their purity. In fact, customers can actually track their batch to learn about its lab results.

12. Bluebonnet Nutrition L-Theanine

Bluebonnet Nutrition’s 150 mg L-Theanine pills are a pure source of L-Theanine. It uses a patented free form of L-Theanine that’s known as suntheanine. This is a reduced, fermented formulation that’s derived from L-theanine, making it more concentrated and potent. It’s also both Kosher and vegetarian-friendly.

Manufactured by Blue Bonnet nutrition, this is a name you can trust. They’ve been manufacturing vitamins, minerals, and herbal supplements since 1991. In 2006, Vitamin Retailer gave them an award for being the Manufacturer of the Year. As such, this is a brand that many people both know and like today.