L-theanine supplements have gained popularity for their ability to promote relaxation and reduce stress without causing drowsiness. In 2025, the market is flooded with various options, making it essential to choose the best products that offer quality and effectiveness. From capsules to powders, the top L-theanine supplements are formulated to enhance focus, improve sleep quality, and support overall mental well-being. Whether you're looking for a natural way to unwind or boost your cognitive performance, these supplements can be a valuable addition to your wellness routine.
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
$9.98
SALE
−$2.00
Sports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus, Relaxation & Alertness - Non-Drowsy Support Made with Coconut Oil, Non-GMO & Gluten Free - 200mg, 60 Count
- ALERT & CALM: L-Theanine, commonly found in the flavonoid herbal green tea, is used as an ayurvedic substitute for those who want the antioxidant benefits of green tea but without caffeine. Encapsulated in a once-daily liquid softgel, our L-Theanine supports feelings of relaxation, calm, focus, and alertness*
- DOUBLE THE SUPPORT: To optimize your potential and give the utmost support, our L-theanine 200 mg amino acid softgels provide double the amount of L-theanine green tea extract commonly found in energy supplements in a convenient max-strength formula
- PATENTED SUNTHEANINE: Formulated with patented and clinically researched Suntheanine—you get all of the alertness and relaxation (+ the increase in alpha brain waves) without the jitters or crash of caffeine, energy pills, or energy drinks*
- PREMIUM INGREDIENTS: We hold all of our supplements to a higher standard. Rest assured that your L-Theanine is crafted using 100% organic coconut oil and an entirely non-GMO verified, gluten-free and soy-free product. Manufactured in the USA in cGMP-compliant facilities
- THE SPORTS RESEARCH DIFFERENCE: Founded in Southern California in 1980, Sports Research is a family-owned business born from a passion for fitness and wellness. Our goal is to embrace the sport of life through research-backed products created for every body—inside and out
$19.95
SALE
−$2.00
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
$11.95
NOW Foods 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*
- 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
$21.94
Nature Made Chewable L Theanine 200mg, L-Theanine Supplement for Stress Relief, 50 Chewable Tablets, 50 Day Supply
- Stress support supplement: contains one 50 count bottle of Nature Made L Theanine 200mg Chewable Tablets for a 50-day supply
- Works within 30 minutes; L-Theanine helps relax the mind without drowsiness
- Fast-acting stress relief (1) in chewable tablets that have no color added, no dairy, and are gluten free
- 100% Drug Free and suitable for vegetarians
- Delicious tropical fruit flavor; Adults, chew 1 tablet per day as needed
$16.99
Integrative Therapeutics L-Theanine - L-Theanine to Support a Relaxed State* - Healthy Stress Response* - Vegan & Gluten-Free Amino Acid Supplement - 200 mg, 60 Capsules
- Healthy Stress Response Supplement*: L-Theanine is an amino acid that supports a relaxed state without diminishing daytime alertness*
- Amino Acid Supplement*: L-Theanine is an amino acid that helps support relaxation and a healthy stress response*
- L-Theanine Supplement for Men & Women: L-theanine can support a healthy stress response*
- Relaxation Supplement for Different Diets*: This l-theanine supplement is vegan, soy free and dairy free; this supplement doesn't contain wheat, corn, artificial colors, or flavors
- For over 35 years, patients and clinicians have trusted Integrative Therapeutics for our dedication to quality, potency, and accuracy; transparency around our sourcing and manufacturing processes is part of our quality promise to you
$21.50
L Theanine 400 mg | L-Theanine Stress Relief | Extra Strength Supplement | Made in USA | Relaxation, Sleep & Calm Support | For Men & Women | Plant Based, Non-GMO & Gluten-Free | 120 Vegan Capsules
- L Theanine Supplement — Don’t stress & do your best! Sleep well with l theanine 400mg! Provides calming & relaxing effect on the body, supports good sleep, and the ability to deal with stress.
- Calm, Sleep & Relax — L theanine works by encouraging brain-wave activity, which improves concentration by reducing distractions and promoting a more focused state of mind
- 100% Natural Source — L Theanine effectively relaxes and relieves mental and physical tension. It has a natural ability to deal with nervousness and stress-related sleep problems. Found and made from the purest, highest quality green tea!
- Made in the USA — L theanine from NUTRAHARMONY does not contain GMOs; it's dairy-free, gluten-free, nut-free, wheat-free, soy-free, nightshade-free, and sugar-free. L-theanine is a perfect addition to your gluten-free & vegan lifestyle with advanced support and significant effects
- Quality Matters — NUTRAHARMONY ltheanine vitamin is an excellent and effortless choice for improving your health. If you want to share your experience or have questions about l- theanine, message us. Our support team works 24/7. Maintain your health anytime, anywhere with a ltheanine supplement!
$19.89
SALE
−$12.10
NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 60 Veg Capsules
- STRESS MANAGEMENT*/PROMOTES RELAXATION*: Promotes relaxation without the drowsiness or negative side effects associated with other calming agents.*
- 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.
$13.89
Pure Encapsulations L-Theanine - Amino Acid Supplement to Support Relaxation, Stress & Nervous System - 60 Capsules
- Amino Acid Supplement: Pure Encapsulations L-Theanine is an amino acid supplement for men and women that supports relaxation without causing drowsiness
- Stress Moderation: This L-Theanine supplement may provide support for occasional nervous tension and irritability, helping to moderate stress
- Nervous System Support: L-Theanine can support moderation of the effects of caffeine on the central nervous system
- High-Quality: Formulated using pure ingredients, this L-Theanine supplement is free from unnecessary additives and common allergens
- Pure Difference: What we leave out matters, too; Pure Encapsulations products are FREE FROM common allergens, artificial or unnecessary ingredients, and GMOs
$61.00
SALE
−$1.76
Horbäach L-Theanine | 400mg | 120 Capsules | Non-GMO & Gluten Free
- L-THEANINE: An amino acid mostly found in green tea leaves and other superfoods
- HIGH POTENCY FORMULA: Quick release capsules deliver 400 mg of L-Theanine per serving
- EXPERTLY CRAFTED: Our professional formula is backed by our commitment to purity and potency
- HORBAACH MANUFACTURERS: Laboratory Tested, Trusted Ingredients, Superior Quality, 100% Guaranteed!
- NATURALLY FREE OF: Gluten, Wheat, Yeast, Lactose, Soy, Artificial Color, Artificial Flavor, & Non-GMO
$9.99
Last update on 2025-05-07 / Affiliate links / Images from Amazon Product Advertising API