L-Theanine is a natural amino acid known for promoting relaxation, and enhancing focus. It's one of the most popular ingredients in stress-relief and sleep-enhancing products.
You will get efficient and thoughtful service from Witspower.
However, with so many options on the market, which is the best L-Theanine supplement for you? We’ve researched, compiled, and compared products based on quality, purity, formula, and price to help you easily find the best option.
When choosing an L-Theanine supplement, the brand's reputation is a crucial factor that should not be overlooked. A reputable brand not only signifies quality but also provides consumers with peace of mind. Brands that have been on the market for a long time are more reliable, ensuring that their products meet strict safety and efficacy standards.
Additionally, brands with a large customer base typically have numerous user reviews. These real-world experiences can give you a clearer understanding of a product’s effectiveness, helping you make an informed decision that aligns with your personal needs. Seeking insights from the user community is also a valuable way to assess customer satisfaction and firsthand experiences with different products.
Besides brand reputation, ingredient quality is a key factor in determining the effectiveness of an L-Theanine supplement. A good product should not only contain an appropriate amount of L-Theanine but also have a clear source, free from contaminants or unnecessary additives.
L-Theanine is a free-form amino acid commonly found in tea leaves, making up 40% to 70% of the total amino acid content and approximately 1% to 2% of the dry weight of green tea leaves. When choosing a supplement, it is important to check the source of L-Theanine and prioritize products extracted from green tea rather than those produced synthetically.
Additionally, it's best to avoid supplements that contain fillers or unnecessary additives, as they may lower the product's quality and effectiveness.
Another crucial factor is third-party purity testing. These certifications help ensure that the product is free from harmful contaminants and meets high-quality standards. Choosing a supplement that has been thoroughly tested provides consumers with greater confidence and peace of mind.
L-Theanine is available in various forms, including capsules, tablets, and powders. Each form has its own advantages and disadvantages, offering flexibility for users.
Capsules and tablets are the most common forms, providing convenience for daily use. They are easy to carry, simple to take, and can be swallowed quickly without any extra preparation. This makes them an ideal choice for those with busy schedules who need a quick and hassle-free solution.
On the other hand, powder form may require additional preparation, such as mixing with water or blending into beverages like smoothies. While improper mixing can sometimes lead to residue, powders offer greater flexibility, allowing users to combine L-Theanine with their favorite drinks for a more enjoyable and varied experience.
Regarding dosage, different forms of L-Theanine supplements may have slight variations, but the recommended optimal intake should not exceed 250mg per day—roughly the equivalent of 10 cups of tea (Saha et al., ).
However, this dosage can be adjusted based on individual needs and tolerance levels, as everyone’s body reacts differently. Choosing the right dosage is essential to maximize the benefits of L-Theanine while avoiding potential side effects.
When choosing an L-Theanine supplement, in addition to considering the form and dosage, it is also important to pay attention to the manufacturing standards and certifications to ensure quality.
A reliable product is often manufactured in facilities that meet cGMP (Good Manufacturing Practices) standards. These strict guidelines help maintain tight control over the entire production process, from raw materials to the final product, ensuring both safety and effectiveness.
Additionally, certifications from reputable organizations such as USP (United States Pharmacopeia) and NSF (National Sanitation Foundation) are significant advantages.
These certifications not only confirm the product’s quality but also ensure compliance with hygiene and safety requirements throughout the manufacturing process. When a product carries these certifications, you can trust that it meets high-quality standards, providing greater peace of mind for your health and well-being.
When purchasing an L-Theanine supplement, price is an important factor to consider alongside quality and effectiveness. The cost of L-Theanine products can vary depending on the quality of ingredients, brand, and formulation. Currently, a reasonable price per serving typically ranges from $0.01 to $1.06.
However, price alone does not determine a product’s overall value. Supplements with higher dosages per serving often provide better value, as you receive more of the active ingredient for a relatively affordable cost.
This means that while a product may have a slightly higher price, if it offers a higher dosage per serving and lasts longer, it can be more cost-effective in the long run.
When choosing an L-Theanine supplement, the formulation plays a crucial role in achieving optimal results, especially for those looking for sleep support and stress relief. L-Theanine can be combined with various ingredients to provide additional benefits. One of the most popular and effective combinations is L-Theanine with magnesium and melatonin.
Magnesium helps relax muscles and supports the nervous system, while melatonin regulates sleep cycles, promoting deep sleep and improving overall sleep quality. When these three ingredients are combined, they not only help the body relax but also enhance sleep quality in a more comprehensive way. This makes it an ideal formula for individuals who struggle with sleep or seek deeper relaxation after a stressful day.
Additionally, L-Theanine can be paired with minerals like calcium and phosphorus, which help maintain nutritional balance and support a healthy nervous system.
However, L-Theanine can also be taken on its own, offering stress-reducing and sleep-supporting benefits without the need for additional ingredients. This leads to a common question: Does L-Theanine make you sleepy?
Choosing the right formulation based on personal needs will help maximize the benefits of L-Theanine, whether through a combination with magnesium and melatonin or by using L-Theanine alone.
Vinatura Magnesium L-Theanine is a powerful blend of Magnesium, L-Theanine, and Melatonin—three key ingredients that promote relaxation and support natural sleep. Each serving contains 100.5mg of elemental Magnesium (from Di-Magnesium Malate and Magnesium Glycinate), 50mg of L-Theanine, and 5mg of Melatonin.
The Magnesium in this supplement not only helps relax muscles but also soothes the nervous system, creating ideal conditions for better sleep. Specifically, Magnesium Glycinate is known for its ability to reduce stress, support restful sleep.
Meanwhile, L-Theanine is an amino acid that promotes relaxation, eases stress, and enhances deep sleep. Lastly, Melatonin helps regulate the body's natural sleep-wake cycle, making it easier to fall asleep and wake up feeling refreshed.
The combination of these three ingredients provides an effective sleep support solution without causing morning grogginess. Additionally, the supplement is manufactured in the USA in a cGMP-certified facility and undergoes third-party testing to ensure high quality. With a formula free from soy, tree nuts, wheat, and dairy, it is a safe choice for individuals with dietary restrictions.
Beyond its impressive formulation, Vinatura Magnesium L-Theanine has received positive feedback from users.
An Amazon customer, CElizab, shared:
"This supplement is INCREDIBLE! I actually only need to take one capsule & it's lights out for me for 8 hours! I wake up refreshed & renewed, ready to take on my day! No grogginess as it’s all natural supplementation!"*
Another user, Edgar, also commented:
"I’ve been using this Magnesium Sleep Aid, and I love it! It helps me relax and fall asleep faster. I wake up feeling rested and refreshed."*
With nearly 80% of reviews rated 4 to 5 stars on Amazon, this supplement is quickly becoming a top choice for those seeking a natural solution to improve sleep.*
Life Extension Theanine XR Stress Relief is an ideal choice for those looking for stress relief without drowsiness. This supplement contains L-Theanine, an amino acid known for promoting relaxation, supporting brain wave activity, and helping users stay alert throughout the day.
One of the standout features of this product is its extended-release technology, which gradually delivers L-Theanine for a long-lasting calming effect.
This allows users to feel relaxed throughout the day without needing multiple doses. Additionally, the product is made in the USA, gluten-free, non-GMO, and comes with a Certificate of Analysis, ensuring its purity and quality.
On Amazon, over 80% of customers have left positive reviews for this product. Most users find this supplement effective in reducing stress and improving sleep quality without causing drowsiness or fatigue. Many also find it helpful for overall stress relief and enhanced focus.*
Doctor's Best L-Theanine with Suntheanine is a worthwhile option if you're looking for a stress relief and sleep support supplement at an affordable price. This product features Suntheanine, a patented form of pure L-theanine known for its relaxation effects.
One of its standout features is the ability to reduce stress without causing drowsiness, allowing users to feel more at ease throughout the day while maintaining alertness.
Suntheanine, derived from Japanese green tea leaves, is believed to cross the blood-brain barrier within 30 minutes of ingestion, directly influencing brain activity to promote a natural sense of relaxation.
This supplement is also highly rated for its safety, as it is free from gluten, soy, and GMOs, making it suitable for various dietary preferences. With over 2,000 global reviews, nearly 90% of which are positive, Doctor’s Best L-Theanine has earned the trust of many consumers.
Many users have shared their experiences with this product. Mari, a customer, noted that L-theanine is particularly beneficial for women, especially those going through menopause. However, she also suggested that individuals with low blood pressure should be cautious when using it to avoid potential unwanted effects.*
Nutricost’s L-Theanine 200mg supplement offers a straightforward yet effective way to support mental clarity and calmness. With 120 easy-to-swallow capsules per bottle, each serving delivers a clean 200mg dose of L-Theanine.
Manufactured in a GMP-compliant and FDA-registered facility, the product also holds Non-GMO and Gluten-Free labels, appealing to health-conscious consumers.
Among nearly 9,000 reviews and a strong “Amazon’s Choice” badge, the supplement is frequently praised for its value, quality, and cognitive benefits. Many users report noticeable improvements in focus especially when taken alongside caffeine*
One popular review by user Tim Brown, liked by 46 others, states: “If you're looking to take the edge off caffeine jitters or quiet your racing mind without feeling like a zombie, this is your ticket. Been using this stuff daily with my morning coffee, two caps at a time (400mg), and it's like upgrading from regular gas to premium – same energy, way smoother ride.”*
Learn more: L-Theanine Caffeine Ratio: How To Add L Theanine To Your Coffee
However, the feedback on ingredient transparency is more divided. While many are satisfied with the efficacy and price point, a number of customers raise concerns about the inclusion of magnesium stearate and the lack of detailed labeling regarding all inactive ingredients.*
NOW Foods offers a thoughtfully formulated L-Theanine supplement that combines 200mg of L-Theanine with 100mg of Inositol per serving.
Designed to promote relaxation without drowsiness, this supplement stands out by incorporating inositol—aB-vitamin-like compound known for supporting brain and nervous system health.
The product comes with 120 vegan, Non-GMO, and Kosher capsules and is backed by both Intertek GMP and NPA A-rated GMP certifications, ensuring high manufacturing standards.
With over 4,500 reviews and an “Amazon’s Choice” label, this supplement receives strong praise from customers—94% of whom give it positive feedback. Users frequently report improved sleep quality, greater mental clarity, and enhanced daytime productivity.*
Many find it particularly helpful for winding down at night and waking up refreshed. One common theme in the reviews is how effectively the product supports focus without causing any side effects, making it a trusted addition to daily wellness routines.*
While most users are satisfied, a small number express reservations about the inclusion of inositol in the formulation, preferring a more simplified ingredient list. Nonetheless, the product’s reputation for effectiveness and purity keeps it among the top-rated in its category.*
Nature Made Chewable L-Theanine 200mg supplement offers a fast-acting, convenient solution for stress relief and mental relaxation. Each chewable tablet provides 200mg of L-Theanine and is formulated to work within 30 minutes, helping to calm the mind without inducing drowsiness.
With a 50-day supply in each bottle, the supplement is gluten-free, dairy-free, vegan, non-habit forming, and made in the USA using globally sourced ingredients. It also carries the “Amazon’s Choice” badge and is recommended as the #1 Pharmacist Recommended Vitamin & Supplement Brand.
With over 1,200 reviews and more than 5,000 purchases, users praise its ability to reduce stress quickly and improve sleep quality through relaxation. Many find the tropical fruit flavor pleasant and convenient for on-the-go use, especially those who prefer not to swallow capsules. Customers also highlight the supplement's good value and the trusted brand reputation of Nature Made.*
However, not all feedback is favorable. Some users report dissatisfaction with the taste, describing it as either overly chalky or unpleasant, and others find the tablets too large and dry, making them difficult to chew. While the effectiveness is widely acknowledged, texture and flavor remain areas of critique.*
Sports Research L-Theanine is one of the most popular L-Theanine supplements on the market and has earned the Amazon’s Choice badge, reflecting strong consumer trust. A key highlight of this product is its use of Suntheanine—a patented form of L-Theanine known to promote relaxation and focus without causing drowsiness or jitteriness like caffeine.
The supplement comes in softgel form with organic coconut oil, allowing for better absorption compared to traditional tablets. Another major advantage is that only one capsule per day is needed, making it a convenient option for those with busy schedules.
Users highly rate the quality and effectiveness of the product. Many have reported feeling calm and relaxed while remaining alert, helping them think clearly and manage stress more effectively. Some reviews also suggest that the supplement supports better sleep, allowing users to wake up feeling refreshed and mentally sharp.*
This product also stands out for its clean formula—non-GMO, gluten-free, and soy-free—making it suitable for various dietary needs. Additionally, it is manufactured in a cGMP-compliant facility in the USA, ensuring strict quality standards and consumer confidence.
Jarrow Formulas Extra Strength Theanine 200 mg is a solid option for those looking for a supplement to support relaxation and stress relief. The product comes in two versions: a bottle with 60 capsules of 200 mg each and another with 120 capsules of 100 mg, allowing users to adjust their dosage based on individual needs.
The L-Theanine in this supplement promotes relaxation without causing drowsiness by positively influencing neurotransmitters like dopamine and serotonin. This helps enhance focus, and reduce stress while maintaining alertness.
One of the key advantages of this product is its clean formula. It is vegan, gluten-free, non-GMO, and free from common allergens such as wheat, dairy, eggs, peanuts, or tree nuts. This makes Jarrow Formulas Theanine a safe choice for a wide range of users, especially those with strict dietary requirements.
The product has received numerous positive reviews from customers. Smaug, a user, shared that Jarrow Formulas L-Theanine significantly improved her sleep: "I tend to wake up in the middle of the night and stay awake for hours. Taking L-theanine at bedtime helps me get back to sleep quickly and sleep the rest of the night!!! I can’t recommend this enough!"*
Healthy Origins L-Theanine provides 100mg of L-Theanine per serving, promoting relaxation without causing drowsiness. This product utilizes AlphaWave® technology, which enhances the effectiveness of L-Theanine while also supporting focus and stress reduction.
For more Raw Powders L-Theanineinformation, please contact us. We will provide professional answers.
Additionally, Healthy Origins has been on the market since and is known for its strict quality standards. These capsules are gluten-free, non-GMO, and vegan, making them suitable for a variety of dietary preferences.
The product has received positive feedback from customers on Amazon, with nearly 90% of reviews rating it 4 or 5 stars. One user, Nhat, shared: "Long lasting and no side effects or strange sensation like I had previously from a cheap brand. 100mg dose is convenient. So glad I found this brand."*
GNC L-Theanine is a dietary supplement containing 200mg of L-Theanine per capsule, derived from green tea, black tea, and white tea. This product is designed to support relaxation, reduce stress, making it particularly beneficial for individuals who frequently experience pressure from work and daily life.
According to the manufacturer, GNC L-Theanine helps maintain a calm state without causing drowsiness. One standout feature of this product is its ability to pair well with caffeine, enhancing focus without the jittery sensation often associated with stimulants.
Users appreciate this benefit, including Ben, who has been taking the supplement for years based on his doctor's recommendation: "My doctor recommended GNC brand L-Theanine a few years back and I’ve taken it ever since. It helps me sleep, and, when taken with caffeine, helps reduce the jitters and promotes focus! Great stuff!"*
Nature's Trove L-Theanine 200 mg is a great option for those looking for natural relaxation without drowsiness. With Kosher certification and manufacturing in a GMP NSF-certified facility in the United States, users can trust its quality and safety.
Additionally, these capsules are free from common allergens such as peanuts, dairy, soy, gluten, or animal products, making them suitable for various dietary preferences, including vegan diets.
Some customers have shared their real-life experiences with the product. D. Rivera mentioned that she purchased this supplement for her husband and mother, and both noticed a significant difference. She noted that her husband experienced better sleep, while she felt calmer and more focused throughout the day.*
This suggests that the product may provide benefits beyond relaxation, including improved mental clarity and focus.
Solgar L-Theanine 150 mg is a standout option for those seeking a solution to help reduce stress and improve sleep. The formula is optimized for better absorption and enhanced effectiveness.
One key aspect of this product is its ability to influence GABA, a neurotransmitter that naturally promotes relaxation without causing excessive drowsiness. Many customers have shared positive experiences with the supplement. On Amazon, nearly 90% of reviews are favorable, with numerous users stating that it genuinely helps them feel calmer and sleep better.*
Additionally, Solgar maintains high-quality standards by eliminating unwanted ingredients such as gluten, wheat, dairy, artificial colors, and sweeteners. This makes the product suitable for various dietary needs, especially for those following a vegan or kosher diet.
However, not all customers have had a perfect experience with this supplement. Some users have reported that the capsules were partially empty or not properly filled, leading to dissatisfaction when using the product.*
Fit Powders L-Theanine is a great choice for those looking for a pure L-Theanine product without additives, fillers, or artificial flavors. The product comes in a fine powder form, making it easy to adjust the dosage according to your needs. It includes a dedicated scoop to help you measure 200mg per serving.
One of the strengths of this product is the quality assurance provided by third-party lab testing, giving users confidence in its purity and effectiveness. Fit Powders also emphasizes that their product is gluten-free, non-GMO, and vegan-friendly.
Additionally, L-Theanine helps promote relaxation, and enhance focus, especially when combined with caffeine. Many users appreciate this combination, as it helps reduce jitters caused by caffeine and extends the focus benefits.*
As Stef C. shared: "All it takes is a heaping scoop with the provided scooper. Put it in your coffee and you won't need another cup for at least 6 hours. The synergy with caffeine is how it works best. With no crash or lethargy. And no anxiousness or stimulant feel."*
Furthermore, Fit Powders is committed to environmental sustainability, with packaging designed to reduce plastic usage by up to 89% compared to traditional plastic containers. This makes the product a responsible choice not only for health but also for the environment.
L-Theanine is one of the most popular supplements for reducing stress, improving sleep, and boosting focus. However, not all L-theanine products are the same. By comparing purity, formulas, certifications, and prices, you can select the product that fits your needs.
Whether you’re looking for a sleep aid or something to pair with caffeine for mental performance, the list above will help you make an informed decision. Have you tried any of the products on this list?
Therapy and medications are common ways to treat anxiety but some research shows that vitamins and supplements can also play a role in reducing it.
That's important since anxiety disorders are not only extremely debilitating but also the most common mental health issue in the US.
Nearly one-third of people will have an anxiety disorder at some point in their lives, and each year up to 19% of the US adult population and 9.4% of children aged 3-17 are affected by them.
Here are some common vitamins and supplements for anxiety, what the research shows, and how much you need.
Not only is vitamin D important for bone, nerve, muscle, and immune health, it also has an influence on your mood and low levels are associated with anxiety and depression.
A small study of people with generalized anxiety disorder who also had low levels of Vitamin D found that weekly doses of 50,000 International Units (IU) for three months reduced the severity of their anxiety symptoms and raised levels of serotonin — a chemical in the brain involved with depression and anxiety.
Although low vitamin D levels can contribute to anxiety, the good news is that getting more of it is simple — it just requires getting some sunshine. Vitamin D is unique in that the body makes it when bare skin is exposed to sunlight.
As little as 10-15 minutes of sunlight on your arms and legs three times a week can be enough to get the recommended amount of vitamin D — 15 mcg, or 600 IU per day.
If you don't get much sun where you live, you can also find Vitamin D in foods such as:
And some foods are usually fortified with it, including:
If you don't eat many foods containing vitamin D or live in a place without much sunlight, then taking a supplement could be useful. According to the Mayo Clinic dosages of - IU per day are safe to take.
When you hear about the benefits of fish oil it is mainly because of its high omega-3 content.
Omega-3s have many health benefits, one of which being they can help decrease cortisol levels, says Dr. Zeke Medina, a clinical pharmacist and sleep consultant at Live Love Sleep.
Cortisol, aka "the stress hormone," can cause anxiety when levels are chronically high due to consistent stress. Therefore, by reducing cortisol levels, omega-3s may help manage anxiety.
Just how much omega-3s may help reduce your anxiety is up to you and your doctor. However, a large review that included over people found that those who took more than 2,000 mg/day of an omega-3 supplement saw improvement in their anxiety whereas those who took less than 2,000 mg/day saw no improvement.
It's important to specify here that the supplements these study participants took were a combination of eicosatetraenoic acid (EPA) and docosahexaenoic acid (DHA). (There are three types of omega-3 fatty acids: EPA, DHA, and lastly alpha-linolenic acid (ALA).)
When talking about omega-3's effects on cortisol and anxiety, EPA and DHA are typically the ones that help. The best way to get more EPA and DHA is by eating more fish or taking a fish oil supplement.
Here are some additional foods high in these omega 3s:
There are eight different B vitamins, known collectively as B-complex. The B vitamins play a role in many physiological processes, including breaking down food for energy, producing red blood cells, and maintaining brain function.
In general, a B-complex supplement can help anxiety because the B vitamins have so many functions that impact your overall health. They also help reduce stress and can improve depression.
One B vitamin in particular, B6, was found to help reduce anxiety in older women, according to a study. And other research has found that B6 combined with magnesium reduced anxiety related to premenstrual syndrome.
The amount of B vitamins you need varies per vitamin and depends on your age and sex, but here's what the average adult needs:
For a supplement Snover says most doctors recommend 100 mg per day of B-complex.
Magnesium is an essential mineral involved in many different chemical reactions in the body including nerve and muscle function, protein creation, and blood sugar regulation.
Supplementing with magnesium can be used to improve sleep, metabolism, and reduce stress, Medina says.
A review found that magnesium supplementation can have an effect in reducing anxiety amongst those with:
However, the review concluded that more high quality research is needed since some of the studies lacked robust statistical analysis, proper placebo controls, among other issues.
The daily recommendation of magnesium for ages 18 and up is 400-420 mg for men and 310-320 mg for women. It can be found in foods like:
If you are having a hard time getting enough magnesium from your diet and want to choose a magnesium supplement keep in mind that there are different forms, some of which have a laxative effect. Magnesium glycinate is a form that is calming and doesn't have a laxative effect.
Gamma-aminobutyric acid (GABA) is a neurotransmitter — a chemical that sends messages between cells. You may have heard of other neurotransmitters, like serotonin and dopamine, both of which affect mood.
Research shows that GABA influences your mood, too, and may play a role in reducing anxiety symptoms. GABA slows down activity in the brain "therefore making us feel relaxed and calm," Snover says.
A study from found that GABA already present in the brain reduced intrusive thoughts, a very common symptom of anxiety. However, there are questions if GABA taken in supplemental form acts on the brain in the same way.
There is some evidence that supplemental GABA can help with stress reduction, and people anecdotally report GABA helping them feel more calm, but more research is needed to fully understand what effects GABA might have on anxiety.
Foods that contain GABA include:
L-theanine is an amino acid found in tea and in trace amounts in some mushrooms. Snover says, "L-theanine impacts chemicals in the brain including GABA, dopamine, and serotonin. All three of these chemicals directly impact anxiety."
A small study had healthy participants take 200 mg of L-theanine tablets for four weeks. While taking it, they had reduced symptoms of anxiety and depression and they also slept better.
You can get L-theanine from green, black, oolong, or white tea. Black tea has the most L-theanine — around 24 mg per cup — while green tea has the least — around 8 mg in a cup of tea. So if you want to get a large dose, say 200 mg, a supplement is the way to go.
Ashwagandha is an important herb in Ayurveda, the traditional medicine of India. In Ayurveda ashwagandha is used as a part of "Rasayana," the branch of medicine focused on aging and rejuvenation.
"There is an impressive growing body of research on the benefits of taking Ashwagandha daily, including studies showing how supplementing this impressive ingredient can help to reduce cortisol levels in the body, as well as reports of increased energy, stamina, and concentration levels," Snover says.
A small study of healthy adults with stress found that taking ashwagandha daily for eight weeks reduced the participants' subjective stress and anxiety levels, decreased serum cortisol, and improved sleep quality.
However, dosage was important. The researchers found that those who took 250 mg of ashwagandha daily experienced the same change in their anxiety as the placebo group: none. But the group who took 600 mg per day reported reduced anxiety.
Ashwagandha is available as a supplement in pill form. Doses are typically - mg of the root powder and 500- mg of the root extract.
Though it is generally safe to consume you should avoid ashwagandha if you:
A simple thing you can have at home for anxiety, especially when it affects your sleep, is herbal tea:
Some other things you can do to reduce anxiety include:
Sometimes anxiety can be a side effect of medications or a symptom of an underlying medical issue such as hormonal imbalances or neurological conditions.
If you experience a sudden onset of anxiety with no obvious cause it is important to check in with your doctor. Anxiety also often goes hand in hand with depression.
Medications and therapy are the most common treatments for anxiety, but research is showing that vitamins and supplements may also help.
Though not likely to be a cure all for anxiety, certain vitamins may be worthwhile, so consider speaking with your doctor about any nutrient deficiencies you may have that could be contributing to your anxiety.
The company is the world’s best CDP Choline supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.