You will find our hand-picked selection of Best L Theanine Supplements below. You have a wide variety of choices of brands such as Nature’s Trove,NOW,Sports Research,BULKSUPPLEMENTS.COM,Nutricost,Vital Proteins available to you as a result of the fact that each one of them has a unique pricing, look, and feel. Continue reading for an in-depth analysis in our Best L Theanine Supplements buying guide!
Our experts tested a variety of Best L Theanine Supplements on the market. Right at the top of the list is Nature’s Trove Best L Theanine Supplements. Check out some more of our favorites below, and read some valuable insight from our experienced editors.



Top 10 Best L Theanine Supplements
We researched and compared the top products in the Best L Theanine Supplements category to provide you with these recommendations.
1. L-Theanine 200mg by Nature's Trove - 120 Vegetarian Capsules

- L-Theanine 200mg may promote relaxation without drowsiness. Also may restores a sense of calm.
- Found naturally in green tea
- Natural Ingredients - Good Health from the Source!
- Made in the USA - GMP NSF Certified Facility - Kosher Certified
- To SAVE EVEN MORE! Select our SUPER VALUE SIZE - 365 Vegetarian Capsules
2. NOW Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 120 Veg Capsules

- STRESS MANAGEMENT*/PROMOTES RELAXATION*: Promotes relaxation without the drowsiness or negative side effects associated with other calming agents.*
- Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
- HEALTHY VASCULAR FUNCTION*/WITH INOSITOL: Formulation includes inositol, a member of the B-vitamin family that is essential for brain and nervous system health.*
- CLASSIFICATIONS/CERTIFICATIONS: Vegan, Kosher, Non-GMO
- GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
- Packaged in the USA by a family owned and operated company since 1968.
- During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.
3. Sports Research Double Strength ‘Suntheanine’ L-Theanine with Organic Coconut Oil - Promotes

- ALERT & CALM: L-Theanine is an amino acid commonly found in green tea and is believed to help with relaxation. Suntheanine is patented, researched, and clinically proven to promote an alert state of relaxation and focus without any accompanying drowsiness. Get focused so you feel ready to take on the day!
- PREMIUM QUALITY: Sports Research is proud to offer products using only the best ingredients available so that you can have total peace of mind in the supplements that you are taking. Our L-Theanine 200mg softgel capsules are certified non-GMO and free of soy, gluten, artificial colors, Hexane, Stearates, and Titanium Dioxide.
- Our products are made in cGMP compliant facilities in the United States, using only the best ingredients from domestic & international origins. For us, it's all about quality control - so you can have confidence in your dietary supplements.
- EASY TO USE: As a dietary supplement, simply take one (1) easy to swallow liquid softgel daily with or without food or as directed by your qualified healthcare professional. Promoting an increase in Alpha brain waves and a decrease in Beta brain waves, you'll find your spark and get the boost you need with none of the sugar or unwelcome side effects from energy drinks or energy supplements.
- THE SPORTS RESEARCH DIFFERENCE: Created in 1980, Sports Research is a privately-owned business born from a passion for fitness, wellness, and healing. Our goal is to help people live their best lives through real, research-backed ingredients created for every body inside and out. We're fully dedicated to sourcing the highest quality products from around the world, backed by third party testing. We all deserve the best in our quest for healthy living. Our mission is to give you just that.
4. BULKSUPPLEMENTS.COM L-Theanine Capsules - Amino Acids Supplement for Stress & Mood Support - Gluten

- May Limit Stress - L-Theanine, or L Theanine, is an amino acid found almost exclusively in green tea. It may promote relaxation and contribute overall sense of calmness.* Not only does it help with stress, Theanine may help you focus and stay on task because of its important role in production of neurotransmitters in the brain.* This focus aid supplement makes it a good choice for people who need to stay alert but want to relax.
- Boosts Immune Health - Theanine, an amino acids supplement for men and amino acids supplement for women, is a powerful antioxidant that helps protect cells from damage. It also supports the production of leukocytes, which are essential for a healthy immune system. This L-Theanine powder and L-Theanine capsules, or GABA supplements, helps keep the body healthy and build up natural defenses against harmful factors!
- Supports Brain Health - Theanine, an amino acid nutritional supplements, is unique in its ability to cross the blood-brain barrier which means it can exert its effects directly on the brain and central nervous system.* Theanine works by increasing the level of neurotransmitters in the brain, as well as GABA. This L Theanine powder, or L-Theanin capsules, also helps with memory, concentration, focus, and learning ability which are optimal for overall health.*
- Pure and Clean - Theanine , a stress supplements, is a natural amino acid that helps promote relaxation and a sense of well-being. Take advantage of our pure and clean theanine, which is available in L Theanine powder and L Theanine capsules, to help you unwind after a long day. Our L Theanine capsules are available in 100 & 300 counts.
- High Quality - All products by BulkSupplements are manufactured according to cGMP Standards to ensure the highest quality for manufacturing, packaging, labeling, and holding operations. Weve made a significant investment in our in-house lab so we can test our products at multiple stages during production. We third party test products, procedures and equipment when required to ensure compliance, standards and consistency.
5. Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free

- 120 Capsules of L-Theanine Per Bottle
- 200mg L-Theanine Per Serving (120 Servings)
- Easy To Take Capsules
- Non-GMO, Gluten Free
- Manufactured In a GMP Compliant, FDA Registered Facility
6. Vital Proteins Feeling Zen™ Pills, 600mg KSM-66® Organic Ashwagandha Capsules Supplement, 200mg

- Start With Feeling Zen ---- A convenient, plant-based capsule delivers a unique combination of functional ingredients that have been shown to support calmness and relaxation**.
- Key Nutritional ---- KSM-66 Organic Ashwagandha, a clinically-studied, bioavailable Ayurvedic herb. It supports our body to adapt calmness and relaxation. Providing a natural way to fight stress and negativity.
- What It Does ---- Feeling Zen delivers a unique combination of organic ashwagandha root extract, L-Theanine, GABA and magnesium. It helps to promote calmness under pressure and relaxation without drowsinessalso support your inner peace & mood.
- Health Truth ---- Whole30 Approved. Vegan friendly. Feeling Zen contains natural plant-based ingredients. No added sugar, fat. Made without gluten & dairy.
- How to Use ---- Feeling Zen capsules can be easily incorporated into your daily wellness routine. Conveniently take 2 capsules daily at anytime of the day.
7. Thorne Theanine - 200mg of L-Theanine - Support a Healthy Stress Response, Relaxation, and Focus -

- Relaxation: Promotes relaxation, focus, and memory by enhancing alpha-wave production in the brain*
- Stress: Supports a healthy stress response*
- GABA: Enhances GABA production in the brain (a brain chemical that acts like a brake during times of runawaystress)*
- Free From: Every Thorne product is made with the purest possible ingredients - without gluten or other major allergens (eggs, tree nuts, peanuts). This product also contains no soy, dairy, yeast, shellfish, or fish.
- Thorne's commitment to integrity and science-backed products has helped us earn the trust of thousands of health-care professionals, U.S. National Teams, the Mayo Clinic, and families around the world.
8. NOW Supplements, L-Theanine 100 mg with Decaf Green Tea, Stress Management*, 90 Veg Capsules

- STRESS MANAGEMENT*/PROMOTES RELAXATION*: L-Theanine promotes relaxation while maintaining alertness and promotes healthy cognitive function.*
- Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
- HEALTHY VASCULAR FUNCTION*/WITH DECAF GREEN TEA: L-Theanine may also support healthy vascular function through this relaxing effect.* It is a unique amino acid found naturally in the tea plant (Camellia sinensis).
- CLASSIFICATIONS/CERTIFICATIONS: Non-GMO, Kosher, Dairy Free, Egg Free, Made without Gluten, Nut Free, Soy Free, Vegan/Vegetarian
- GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
- Packaged in the USA by a family owned and operated company since 1968
- During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.
9. MaryRuth's L Theanine 200mg Liquid Drops | L-Theanine + Organic Glycerin | Stress Relief for Adults

- L-Theanine Liquid Drops: Support stress levels, cognitive function, sleep and more with these delicious, lemon-lime flavored liquid drops. With L-Theanine in easy-to-take liquid form, you can simply take it by mouth, add to a glass of water, your favorite morning juice, or a smoothie!
- Multiple Benefits: L-Theanine is an amino acid found primarily in green and black tea and some mushrooms. It promotes relaxation and may ease occasional anxiety and stress while supporting memory and thinking skills (cognitive function).
- Vegan Formula: Per Serving (60 Drops): 200 mg L-Theanine. Other Ingredients: Purified Water, Organic Glycerin, Citric Acid, Natural Flavor, Organic Stevia Leaf Extract, and Potassium Sorbate. Formulated for Adults and Kids.
- Easy-to-Take-Drops: Shake well before each use. Once daily, take directly by mouth. Avoid direct dropper contact to mouth to prevent product contamination. Use the following to assess dosage or dose as recommended by a physician or healthcare professional: 4-8 Years: Up to 30 drops (1 mL)/day, 9-13 Years: Up to 60 drops (2 mL)/day, 14+ Years: Up to 60 drops (2 mL)/day, Pregnant/Lactating: Consult with a physician or healthcare professional.
- For Most Lifestyles: MaryRuth L Theanine liquid drops are Non-GMO, Vegan, Made in a GMP (Good Manufacturing Practice) Facility Dairy Free, Nut Free, Soy Free, and Sugar Free. Each bottle comes with 30 servings.
10. Garden of Life mykind Organics Sleep Well Rest & Refresh 30 Tablets, Lemon Balm, Green Tea Extract

- Promotes restful sleepso you can awake truly refreshed
- Includes L-Theanine, a powerful amino acid clinically shown to aid deep relaxation, from organic green tea extract
- Relaxing herbs like organic lemon balm, valerian, passionflower and chamomileplus probiotics to enhance digestion
- Nutrients from real foods using water extraction & clean tablet technology with 100% organic & non-GMO tablet materialsno soy or corn-derived ingredients
- Certified USDA Organic, Non-GMO Project Verified, NSF Certified Gluten Free, Certified Vegan & Kosher
Peter
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