13 Best L-Theanine Supplements For Stress Relief & Better Sleep

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.

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.

Comparison Table Of 13 Best L Theanine Supplements

How Do We Choose the Best L Theanine Supplements?

Brand Reputation

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.

Ingredients Quality

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.

Form and Dosage

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., 2024).

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.

Manufacturing Standards and Certifications

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.

Price and Value for Money

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.

Formula

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.

13 Best L Theanine Supplements for Stress Relief & Better Sleep:

Vinatura Magnesium L-Theanine Sleep Aid 650 mg - 60 Servings | $24.89 | Best For Stress Relief & Better Sleep

Review

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.*

Pros

• Made in the USA with High-Quality Standards: Vinatura Magnesium L
• Theanine is manufactured in a cGMP-certified facility and has undergone third-party testing to ensure purity and product quality.
• Highly Rated & Amazon’s Choice: With hundreds of positive reviews and a high rating, this supplement has demonstrated its effectiveness and reliability according to user feedback.
• Promotes Natural Sleep Without Morning Grogginess: Thanks to the combination of Magnesium, L-Theanine, and Melatonin, this supplement helps users relax, enjoy deep sleep, and wake up feeling refreshed.
• Safe Formula, Free from Common Allergens: Does not contain soy, tree nuts, wheat, or dairy, making it a suitable choice for a wide range of users.

Cons

• Requires taking two capsules per serving: Some customers wish the product had a higher concentration so they could take just one capsule instead of two per serving.*
  

Life Extension Theanine XR Stress Relief 490 mg - 60 Servings | $9.97

Review

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.*

Pros

• A reputable brand with over 40 years of experience: Founded in 1980, Life
• Extension is well-known in the dietary supplement industry.
• Extended-release formula: Provides immediate relaxation while maintaining a calm state throughout the day.
• Convenient one-capsule serving: No need to split doses throughout the day.
  
• Recognized as Amazon’s Choice and trusted by many consumers.
  

Cons

• Some individuals may experience mild side effects, such as skin rash or facial redness.*
• Effectiveness may vary: Some customers reported no significant changes after use, though the duration of use was not clearly specified.*
• May affect heart rate in individuals sensitive to caffeine, even though the product does not contain caffeine. User Laura cautions that those sensitive to caffeine may experience an unusually rapid heartbeat when taking the supplement in the morning.*

Doctor's Best L-Theanine with Suntheanine 150 mg - 90 Servings | $19.20 | Great for Stress Relief & Sleep Aid

Review

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.*

Pros

• A well-established brand with over 30 years of experience, ensuring quality and reliability.
• Nearly 90% positive reviews on Amazon with over 2,000 customer ratings, demonstrating strong consumer trust.
• Uses Suntheanine – a patented form of L-theanine sourced from Japanese green tea.
• Free from common allergens such as gluten, soy, and GMOs, making it suitable for various dietary preferences.

Cons

• Contains silicon dioxide, a controversial ingredient regarding potential long-term health effects.*
• Some users have reported side effects such as headaches after taking the supplement.*
• Effectiveness varies among individuals, with some Amazon reviews stating that the product did not provide significant improvements as expected.*

Nutricost L-Theanine 200mg - 120 Servings | $11.95

Review

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.*

Pros

• High potency with 200mg L-Theanine per serving
• Affordable price with 120 servings per bottle
• Non-GMO and Gluten-Free
• Manufactured in a GMP-compliant, FDA-registered facility
• Well-rated for improving focus and calming caffeine-related jitters

Cons

• Some users report concerns about ingredient transparency
• Contains magnesium stearate, which a few customers try to avoid
  

NOW Foods Supplements, L-Theanine 300 mg - 120 Servings | $21.85

Review

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.*

Pros

• Contains both 200mg L-Theanine and 100mg Inositol per serving
  
• Promotes relaxation and mental clarity without drowsiness
• Vegan, Kosher, and Non-GMO certified
• Manufactured under NPA A-rated and Intertek GMP certifications
• Highly rated for sleep support and improved focus
• Packaged in the USA by a trusted family-owned company since 1968
  

Cons

• A few customers dislike the inclusion of inositol*
• Higher price point compared to some single-ingredient L-Theanine supplements
  

Nature Made Chewable L Theanine 200mg - 50 Servings | $16.48

Review

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.*

Pros

• 200mg L-Theanine per chewable tablet
• No added color, gluten-free, dairy-free, and vegan
• Made in the USA with globally sourced ingredients
• Convenient alternative for those who dislike capsules
• Trusted brand with strong pharmacist recommendation

Cons

• Mixed opinions on taste—some find it unpleasant*
• Tablets are large and chalky, which may affect user experience*
  

Sports Research [SR] L-Theanine 200mg - 120 Servings | $35.05

Review

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.

Pros

• Contains Suntheanine – a patented form of L-Theanine.
• High L-Theanine dosage (200mg per capsule), twice the amount found in many other products, optimizing effectiveness.
• Softgel formed with organic coconut oil for improved absorption.
• Non-GMO, gluten-free, and soy-free, making it suitable for various dietary preferences.
  
• Manufactured in a cGMP-certified facility in the USA, ensuring high quality and product safety.

Cons

• Capsules may stick together, making them difficult to remove and potentially affecting product quality.*
  
• Some customers have reported side effects such as shortness of breath and rapid heartbeat within 30 minutes of use.*
  
• Not everyone experiences noticeable benefits, with several users stating that the product did not deliver the expected effects.*
  

Jarrow Formulas Extra Strength Theanine 200 mg - 60 Servings | $19.29

Review

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!"*

Pros

• The formula is vegan, non-GMO, and gluten-free, making it suitable for various dietary needs and individuals with sensitivities.
  
• Free from common allergens, ensuring safety for those with a history of food allergies.
• Manufactured by Jarrow Formulas, a reputable brand known for high-quality supplements trusted by many consumers.

Cons

• Some customers have expressed concerns that the product formula may have changed since 2021, potentially affecting its effectiveness compared to previous versions.*
• Individuals sensitive to sugar should be cautious, as the product may contain ingredients that could impact blood sugar levels.*
• Possible side effects include headaches, though this is not common, but some users have reported experiencing this issue.*

Healthy Origins L-Theanine 100mg - 180 Servings | $18.99

Review

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.

Additionally, Healthy Origins has been on the market since 1996 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."*

Pros

• Affordable price: Compared to other L-Theanine supplements on the market,
• Healthy Origins offers a competitive price, especially with 180 capsules per bottle.
• AlphaWave® formula: Produced through a fermentation process, ensuring the purity and optimal effectiveness of L-Theanine.
• Trusted brand: Healthy Origins is a well-established brand, founded in 1996, committed to providing high-quality supplements.
  
• Non-GMO, gluten-free, and vegan: Suitable for vegetarians and those with specific dietary needs.
• Independently tested: Ensuring quality and safety before reaching consumers.
  

Cons

• Some customers noticed that the product contains stearic acid, even though this ingredient is not disclosed on the brand’s official website.*
  
• Some consumers were disappointed to learn that the product is manufactured in China rather than in the U.S. as they had expected.*
  
• Some reviews suggest that Healthy Origins is not as effective as other brands, especially when compared to higher-dose L-Theanine supplements or those with specialized formulations.*

GNC L-Theanine 200 mg - 60 Servings | $34.99 | Best For Stress Relief & Better Sleep

Review

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!"*

Pros

• Long-standing and reputable brand: GNC is a well-established brand in the supplement industry, founded in 1935, and trusted by many consumers.
• Supports sleep and reduces stress: The product is highly rated for promoting better sleep, and reducing stress.
• Can be combined with caffeine: Some users report that when taken with caffeine, GNC L-Theanine enhances focus while reducing caffeine-induced jitters.

Cons

• Relatively high price: At $34.99 for 60 capsules, this may not be the most budget-friendly option compared to other L-Theanine supplements on the market.
• Inconsistent effectiveness: Some users report that they did not notice significant changes while using the product, suggesting that its effects may vary depending on individual body chemistry.*
  
• Not suitable for vegetarians: The product contains gelatin, an animal-derived ingredient, making it unsuitable for vegetarians and vegans.

Nature's Trove L-Theanine 200 mg - 120 Servings | $25.90

Review

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.

Pros

• Affordable pricing: At $25.90 for 365 capsules, this is one of the most cost-effective L-Theanine supplements on the market, making it ideal for long-term use.
• Flexible size options: Users can choose between 120 servings or 365 servings, allowing for easy customization based on individual needs.
• Free from allergens: The product is completely free of peanuts, eggs, dairy, gluten, shellfish, and other animal-derived ingredients, making it suitable for vegans and individuals with sensitivities.
• Manufactured in the USA, ensuring purity and reliability.

Cons

• Some users experience side effects: While highly rated, not everyone has a positive experience. Some users have reported symptoms like stomach pain, heartburn, or headaches after taking the product.*
• May not work for everyone: Some customers have used it for a year without noticing any difference, suggesting that its effectiveness may vary depending on individual biology.*
• Controversial scent: Some users have mentioned that the capsules have a smell similar to cleaning products, which can be off-putting.*

Solgar L-Theanine 150 mg - 60 Servings | $26.99

Review

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.*

Pros

• A reputable brand with over 75 years of experience in the supplement industry, ensuring quality and reliability.
• Formulated with Suntheanine, a patented form of L-Theanine designed for faster absorption and enhanced effectiveness.
• Free from gluten, wheat, dairy, and artificial ingredients, making it suitable for vegans, vegetarians, and those following a kosher diet.
• Manufactured under strict standards, utilizing USP water filtration and HEPA air filtration to maintain the highest levels of purity and quality.

Cons

• Some customers have reported receiving capsules that were partially filled or empty, affecting their overall experience.*
• A few users have experienced side effects such as headaches after taking the supplement.*

Fit Powders L-Theanine 200 mg - 500 Servings | $9.15

Review

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.

Pros

• Pure L-Theanine powder, free from fillers, non-GMO, gluten-free, and suitable for vegans.
  
• Independently tested by third-party laboratories to ensure purity and safety.
  
• Comes with a dedicated scoop for easy measurement of the recommended dosage.
• High value with 5000 servings per container, more cost-effective compared to capsule forms.
• Environmentally friendly packaging, designed to minimize plastic consumption.

Cons

• Has a chemical-like smell when used, with some users reporting that the taste of the powder is unpleasant.*
• Some users have experienced joint pain, though this is rare, and a few reported discomfort after using the product.*
  
• Difficult to dissolve, leaving white powder residue on the drink.*

Conclusion

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?