L-Theanine, ranked by real cost

Name: L-Theanine supplement price and label-normalized ranking
Creator: TrueServing

Typical dose: 200–400mg/day
Used for: Relaxation without sedation, focus and attention, sleep quality, stress reduction
Evidence: Moderate — human studies support anxiolytic and attention-enhancing effects, particularly in combination with caffeine

L-Theanine is an amino acid found naturally in green tea, known for promoting relaxation without drowsiness. It works primarily by increasing alpha brain wave activity and modulating neurotransmitters including GABA, serotonin, and dopamine. It is frequently paired with caffeine for a focused, calm alertness — a combination supported by multiple human studies. Typical doses range from 100–400mg per day, with 200mg being the most common. Suntheanine is the most widely recognized branded form, produced via enzymatic synthesis to yield pure L-isomer theanine. L-Theanine is available as capsules, tablets, and powder. Products below are ranked by cost at your chosen daily dose.

Read our L-Theanine price comparison article for tips on what to look for when buying l-theanine.

Daily dose (mg) 3rd-party tested Certificate of Analysis 100+ reviews

116 products

#	Product	30-day cost	Supply	Sticker
1	Purisure L-Theanine Powder, 100 g, Pure L Theanine Powder That Promotes Relaxation and Focus, Supplement for Cognitive Function, No Fillers, Non-GMO, 1000 Servings Purisure Store Powder	$0.48	500d	$15.99	View on Amazon
2	BulkSupplements.com L-Theanine Powder - L-Theanine Supplement, L-Theanine 200mg - Amino Amino Supplement, Pure & Gluten Free, 200mg per Serving, 250g (8.8 oz) (Pack of 1) BulkSupplements Store Powder3rd-party tested	$0.55	1250d	$22.97	View on Amazon
3	L-Theanine Powder 100g – L Theanine Supplement, Scoop Included, Pure, Non-GMO, Vegan, Gluten-Free FitPowders Store Powder	$0.67	500d	$11.15	View on Amazon
4	PURE ORIGINAL INGREDIENTS L-Theanine (8 oz) Amino Acid Supplement, No Additives or Fillers PURE ORIGINAL INGREDIENTS Powder	$0.75	1130d	$22.49	View on Amazon
5	Nutricost L-Theanine Powder 100 Grams - Gluten Free & Non-GMO Nutricost Store Powder3rd-party tested	$0.96	500d	$15.95	View on Amazon
6	Product gallery WHYZ Store Powder	$1.15	450d	$17.19	View on Amazon
7	Pure L-Theanine Powder, 100 Grams (1 Year Supply), Filler Free, No GMOs and Vegan Friendly Micro Ingredients Store Powder	$1.20	500d	$15.99	View on Amazon
8	BulkSupplements.com L-Theanine Powder - L-Theanine Supplement, L-Theanine 200mg - Amino Amino Supplement, Pure & Gluten Free, 200mg per Serving, 100g (3.5 oz) (Pack of 1) BulkSupplements Store Powder	$1.20	500d	$19.97	View on Amazon
9	Horbäach L Theanine \| 200mg \| 400 Capsules \| Value Size \| Non-GMO, Gluten Free Supplement Horbäach Store Capsules	$1.50	400d	$19.99	View on Amazon
10	BulkSupplements.com L-Theanine Capsules - L-Theanine Supplement, L-Theanine 200mg, Theanine Pills - Amino Amino Supplement, Gluten Free - 1 Theanine Capsule per Serving, 365 Capsules BulkSupplements Store Capsules3rd-party tested	$1.64	365d	$19.97	View on Amazon
11	L-Theanine Powder 25g – L Theanine Supplement, Scoop Included, Pure, Non-GMO, Vegan, Gluten-Free FitPowders Store Powder	$1.64	125d	$6.85	View on Amazon
12	Bronson L-Theanine 200mg (Double-Strength) with Passion Flower Herb, Non-GMO Gluten-Free Soy-Free Stress Management Supplement, 360 Capsules Bronson Store Capsules	$1.66	360d	$19.97	View on Amazon
13	NutraChamps L-Theanine 200mg Capsules, Double-Strength L-Theanine Liquid with Vitamin D3, Organic Coconut Oil, 120 Vegan Capsules (Pack of 2) NutraChamps Store Capsules	$2.12	240d	$16.95	View on Amazon
14	Best Naturals L-Theanine 200mg per Tablet (400mg per 2 Tablets) - Promotes Relaxation Without Drowsiness - 120 Vegetarian Tablets - (120 Count (Pack of 2)) Best Naturals Store Tablets	$2.25	240d	$17.98	View on Amazon
15	Carlyle L-Theanine 200mg Supplement \| 120 Capsules \| Non-GMO, Gluten Free Carlyle Store Capsules	$2.25	120d	$8.99	View on Amazon
16	Vitamatic Caffeine Pills with L-Theanine – 300 mg Per Tablet – 120 Vegetarian Tablets (Pack of 2, Total 240 Tablets) Vitamatic Store Tablets	$2.37	240d	$18.99	View on Amazon
17	Bronson L-Theanine 200mg (Double-Strength) with Passion Flower Herb, Non-GMO Gluten-Free Soy-Free Stress Management Supplement, 120 Capsules Bronson Store Capsules	$2.49	120d	$9.97	View on Amazon
18	Nature's Trove L-Theanine 200mg 120 Vegetarian Capsules Nature's Trove Store Capsules3rd-party tested	$2.50	120d	$9.98	View on Amazon
19	Best Naturals L-Theanine 200mg per Tablet (400mg per 2 Tablets) - Promotes Relaxation Without Drowsiness - 120 Vegetarian Tablets - (120 Count (Pack of 1)) Best Naturals Store Tablets	$2.50	120d	$9.99	View on Amazon
20	Vitamatic L-Theanine 200mg with Caffeine 100mg – 120 Vegetarian Tablets Nootropic Supplement for Focused Energy & Mental Clarity Vitamatic Store Tablets	$2.50	120d	$9.99	View on Amazon
21	Oxify L- Theanine 200 mg \| 120 Tablets \| Gluten-Free, Non-GMO \| Supplement Made in USA Oxify TabletsFew reviews	$2.50	120d	$9.99	View on Amazon
22	KAL L Theanine 25 mg ActivMelt - Relaxation, Stress, Mood and Focus Supplement - Delicious Natural Pineapple Flavor with Stevia - Vegetarian - 120 Servings, 120 Instant Dissolve Micro Tablets KAL Store Tablets	$2.72	15d	$10.89	View on Amazon
23	L-Theanine 400mg, 400 Capsules – Extra Strength Theanine Supplement – Amino Acids for Focus & Relaxation Support – Non-GMO & Gluten Free DEAL SUPPLEMENT Capsules	$2.85	400d	$18.99	View on Amazon
24	NatureBell L-Theanine Supplement - 400 Capsules - 400mg Max Potency Amino Acid Support - for Relaxation, Calm, and Focus - Non-Drowsy Free-Form Formula* NatureBell Store Capsules3rd-party tested	$3.00	400d	$19.99	View on Amazon
25	PRISTINE'S L Theanine 200mg Supplement Capsules - 3rd Party Tested Non GMO -150 Day Supply - Relaxation & Sleep Quality Support Capsules - Vegan, cGMP Facility & Gluten Free Glass Bottles PRISTINE'S Store Capsules	$3.20	150d	$15.99	View on Amazon
26	Horbäach L-Theanine 400mg \| 400 Capsules \| High Potency Supplement \| Non-GMO & Gluten Free Horbäach Store Capsules	$3.29	400d	$21.96	View on Amazon
27	Caffeine Pills with L-Theanine - 180 Energy Pills for Women & Men - Clean & Long-Lasting Focused Energy - Sustained Release 100mg Caffeine + 200mg L Theanine - No Crash Capsules, Vegan Supplement NutraChamps Store Capsules	$3.32	180d	$19.95	View on Amazon
28	Healthy Origins L-Theanine 100 mg (AlphaWave, Supports Relaxation Without Drowsiness, Brain Support, Non-GMO, Gluten Free), 180 Veggie Caps Healthy Origins Store Capsules	$3.33	88d	$19.99	View on Amazon
29	Max Strength Caffeine L Theanine Pills (200mg/500mg) - No Jitters Peak Energy, Focus, Performance, Alertness - Caffeine Pills & L-Theanine Capsules, No Crash & Drowsiness, Potent Supplement, 60 Count BioWisdom Nutraceuticals Store Capsules	$3.36	600d	$26.90	View on Amazon
30	BESTVITE L-Theanine 200mg (120 Vegetarian Capsules) - No Stearates - Vegan - Non GMO - Gluten Free BESTVITE Store Capsules3rd-party tested	$3.75	120d	$14.99	View on Amazon
31	Micro Ingredients L-Theanine 400mg, 400 Softgels \| Highly Bioavailable with Coconut Oil \| Extra Strength Theanine Amino Acid \| Calm & Relaxation Support + Focus Supplement \| Non-GMO, Gluten Free Micro Ingredients Store Softgels	$3.75	400d	$24.99	View on Amazon
32	PURE ORIGINAL INGREDIENTS L-Theanine (365 Capsules) Amino Acid, No Magnesium or Rice Filler, Lab Verified PURE ORIGINAL INGREDIENTS Capsules	$3.79	801d	$22.99	View on Amazon
33	NOW Foods Supplements, L-Theanine 100 mg with Decaf Green Tea, Stress Management*, 90 Veg Capsules NOW Foods Store Capsules	$4.23	45d	$12.70	View on Amazon
34	NutraChamps L-Theanine 200mg Capsules \| Double-Strength L-Theanine Liquid with Vitamin D3, Organic Coconut Oil \| Supports Mood, Focus, Stress Relief \| for Kids & Adults \| 120 Vegan Capsules NutraChamps Store Capsules	$4.24	120d	$16.95	View on Amazon
35	PureFormulas L Theanine Supplement 100 mg, L-Theanine Supports Stress Levels, Relaxed State, Mood, Sleep, Dairy Free, Soy Free, Non-GMO 60 Vegetarian Capsules PureFormulas Store Capsules	$4.25	60d	$16.99	View on Amazon
36	Vitamatic L-Theanine Supplement 400mg per Serving - 240 Tablets - Non-GMO, Gluten Free Vitamatic Store Tablets	$4.25	240d	$16.99	View on Amazon
37	Organika L-Theanine Supplement 8 oz - 90 Capsules: 90 Day Supply of Clean Bioavailable L Theanine for Relaxation, Balance, and Calm - Easy-to-Swallow Single Capsule Servings Organika Store Capsules	$4.33	101d	$12.99	View on Amazon
38	Nature's Truth L Theanine \| 200mg \| 60 Quick Release Capsules \| Non-GMO & Gluten Free Supplement \| Non-GMO & Gluten Free Supplement Nature's Truth Store Capsules	$4.49	60d	$8.99	View on Amazon
39	Force Factor L Theanine 200mg, Extra Strength L-Theanine Supplement for Stress Relief, and Supporting Calm and Relaxation, Vegan, Non-GMO, No Gelatin, 60 Vegetable Capsules Force Factor Store Capsules	$4.49	60d	$8.99	View on Amazon
40	Amazon Elements - L-Theanine, 200mg, 60 Capsules, Vegan and gluten free, 2 month supply (Packaging may vary) Amazon Elements Store Capsules	$4.80	60d	$9.60	View on Amazon
41	Horbäach L-Theanine Supplement \| 400mg \| 120 Powder Capsules \| Non-GMO & Gluten Free Horbäach Store Capsules	$4.94	120d	$9.89	View on Amazon
42	L-Theanine Gummies \| 200mg L Theanine per Serving \| 120 Servings \| Zero Sugar \| 3rd-Party Lab Tested FloHydro Store Gummies3rd-party tested COA	$4.99	120d	$19.95	View on Amazon
43	L-Theanine 200mg Double Strength - Supports Health Sleep Response and Relaxation - 120 Capsules (Third Party Tested, Gluten Free) by Double Wood Double Wood Supplements Store Capsules	$4.99	120d	$19.95	View on Amazon
44	Piping Rock L-Theanine 200mg Supplement \| 60 Capsules \| Double Strength \| Non-GMO, Gluten Free Piping Rock Store Capsules	$5.00	60d	$9.99	View on Amazon
45	Nootropics Depot L-Theanine Capsules 200mg (180 Count) \| Promotes Relaxation \| Supports Healthy Stress Levels + Sleep Cycles \| Promotes Cognitive Function + Focus \| Amino Acid Supplement Nootropics Depot Store Capsules	$5.00	180d	$29.99	View on Amazon
46	L-Theanine Spring Valley 100 mg Support 100 Count + me Gusta Sticker ME GUSTA SHOP CapsulesFew reviews	$5.91	50d	$19.69	View on Amazon
47	Jarrow Formulas® Regular Strength Theanine 100 mg, Dietary Supplement, 60 Capsules, 60 Day Supply Jarrow Formulas Store Capsules	$5.99	30d	$11.99	View on Amazon
48	Superior Labs L-Theanine 250 mg Capsules, Non-GMO, Promotes Non Drowsy Relaxation & Helps Ease Everyday Stress, Supports Healthy Sleep, Promotes a Focused Mind, High Absorption, 90 Veg Caps Superior Labs Store Capsules	$6.00	113d	$18.00	View on Amazon
49	NOW Foods Supplements, L-Theanine Pure Powder, Tension Management*, Amino Acid, 1-Ounce NOW Foods Store Powder	$6.36	133d	$19.73	View on Amazon
50	VALI Caffeine 50mg & L Theanine 100mg - Caffeine Pills & L-Theanine for Smart Smooth Energy & Focus Supplement. Nootropic Brain Booster Cognitive Support Stack & Focused Clarity. 120 Veggie Capsules VALI Store Capsules	$6.50	60d	$25.99	View on Amazon
51	Nootropics Depot L-Theanine Capsules 200mg (90 Count) \| Promotes Relaxation \| Supports Healthy Stress Levels + Sleep Cycles \| Promotes Cognitive Function + Focus \| Amino Acid Supplement Nootropics Depot Store Capsules	$6.66	90d	$19.99	View on Amazon
52	SBR Nutrition Liquid L-Theanine Drops \| All Natural, Vegan, Alcohol Free, Non-GMO \| for Sleep Aid, Calm, Relaxation, Focus Without Drowsiness \| Synergistic with Coffee or Caffeine SBR Nutrition Store Liquid	$6.98	68d	$13.97	View on Amazon
53	Whole Foods Market, L-Theanine 100 MCG 60 CT 365 by Whole Foods Market Store Capsules	$7.49	30d	$14.99	View on Amazon
54	(3 Pack) Smarter L-Theanine 250mg Supplement, in Non-GMO Flaxseed Oil, 150 Liquid Softgels SmarterVitamins Store Softgels	$7.80	188d	$38.99	View on Amazon
55	CyberCerix Liposomal L-Theanine 500mg, Complex with GABA 200mg & Magnesium 100mg, Extra Strength Supplement for Calm, Relaxation & Focus, Gluten Free - 60 Capsules CyberCerix Capsules	$8.07	150d	$16.14	View on Amazon
56	NATURAL STACKS Smart Caffeine Pills - 100mg Caffeine + 200mg L-Theanine Supplement - Supports Energy and Focus - No Jitters and No Crash - 60 Capsules NATURAL STACKS Store Capsules	$8.48	60d	$16.96	View on Amazon
57	Country Life L-Theanine Fast-Acting 100mg, 60 Chewable Tablets, Mint- Flavored, Certified Gluten Free, Certified Vegan Country Life Store Tablets	$9.26	30d	$18.52	View on Amazon
58	Natural Factors Suntheanine L-Theanine 100 mg - Health Supplement for Calm Outlook - L-Theanine Supplement Supports Relaxing Sleep & Aids Against Drowsiness - 60 Chewable Tablets (30 Servings) Natural Factors Store Tablets	$9.44	60d	$18.87	View on Amazon
59	Natural Vitality Calm Mind, Magnesium Citrate + L-Theanine Powder, Supplement for Stress Relief, Gluten Free & Vegetarian, Unflavored, 12 oz. Natural Vitality Powder	$9.55	113d	$35.99	View on Amazon
60	L Theanine 400 mg \| L-Theanine Stress Relief \| Extra Strength Supplement \| Lab Tested \| Relaxation, Sleep & Calm Support \| For Men & Women \| Plant Based, Non-GMO & Gluten-Free \| 120 Vegan Capsules NUTRAHARMONY Store Capsules	$9.95	120d	$19.89	View on Amazon
61	Bluebonnet Nutrition L-Theanine 200mg, Free-Form Amino Acid, Promotes Relaxation*, Soy-Free, Gluten-Free, Non-GMO, Kosher Certified, Vegan, 60 Vegetable Capsules, 60 Servings BlueBonnet Store Capsules	$9.98	60d	$19.96	View on Amazon
62	WellVeraVida L Theanine Caffeine Liquid Drops, High Potency L-Theanine 100mg w. Caffeine Vitamin B12 B6, Natural Nootropic Brain for Smooth Energy Focus Alertness, 6X Stronger Than Pills Powder Gum WellVeraVida Store Powder3rd-party tested	$9.98	15d	$9.98	View on Amazon
63	L Theanine 200mg, Theanine Supplement with Gaba, Liquid Theanine Formular \| Extra Strength L-Theanine w. Magnesium & Jujube Seed For Men & Women, Calm & Relaxation, Sleep & Mood Support, Vegan Non-GMO AMENQ hHEALTH Store LiquidFew reviews	$9.98	30d	$9.98	View on Amazon
64	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 Sports Research Store Softgels3rd-party tested	$9.98	60d	$19.95	View on Amazon
65	L-Theanine Supplement with Caffeine, Organic Liquid Caffeine 50mg w. L-Theanine 100mg, Vitamin B12 B6 for Focused Energy, Alertness & Recess Mood, Nootropic Brain Drops for Women & Men丨30 Days Supply GLOVVUUP Liquid3rd-party tested	$9.99	15d	$9.99	View on Amazon
66	Phytoral Potent L-Theanine Liquid Drops - High Absorption L-Theanine for Kids & Adults Calm & Relaxation Support - Premium Quality Drops Ideal for Children and Adults Liquid - 2 Fl Oz Phytoral Store Liquid	$9.99	30d	$9.99	View on Amazon
67	L Theanine 200mg Liquid Drops - Natural Sleep Support & Focus Supplement for Kids & Adults - Vegan, Non-GMO, Gluten Free 200mg Pure L-Theanine Drops Liquid Supplements, Mood Ltheanine for Kids 2 FL Oz DR. BO Store Liquid	$10.00	30d	$10.00	View on Amazon
68	BESTVITE Double Strength Suntheanine L-Theanine 200mg – Patented & Clinically Studied – 60 Vegetarian Capsules – Vegan – No Stearates – Non GMO – Gluten Free – Relaxation Support BESTVITE Store Capsules3rd-party tested	$10.00	60d	$19.99	View on Amazon
69	Jarrow Formulas® Theanine 100 mg Gummies, Dietary Supplement That Promotes Calmness, 60 Apple-Flavored Gummies, 60 Day Supply Jarrow Formulas Store Gummies	$10.00	30d	$19.99	View on Amazon
70	Jarrow Formulas Extra Strength L Theanine 200mg Dietary Supplement that Promotes Relaxation, Supplement for Relaxation Support, 60 Veggie Capsules, 60 Day Supply Jarrow Formulas Store Capsules	$10.49	60d	$20.99	View on Amazon
71	365 by Whole Foods Market, L Theanine Double Strength 200mg, 60 Count 365 by Whole Foods Market Store CapsulesFew reviews	$10.99	60d	$21.98	View on Amazon
72	Country Life L-Theanine 200 mg 60 Vegan Capsules with Vitamin B6 \| Supports Focus with Clinically Studied Suntheanine L Theanine Country Life Store Capsules	$11.36	60d	$22.72	View on Amazon
73	Sports Research L-Theanine Supplement with Caffeine & Coconut MCT Oil - Focused Energy, Alertness & Relaxation Without Drowsiness - 200mg L Theanine, 100mg Organic Caffeine - 60 Liquid Softgels Sports Research Store Softgels	$11.48	60d	$22.95	View on Amazon
74	PROTOCOL FOR LIFE BALANCE L-Theanine 200mg - Normal Stress Relief - Non-Drowsy - 60 Veg Caps PROTOCOL FOR LIFE BALANCE Store Capsules	$11.50	60d	$23.00	View on Amazon
75	Superior Source L-Theanine 200 mg - Brain Health Support Supplement for Adults - Supplement Formula Aids Better Sleep & Daily Energy - Supports Concentration Naturally - 100 Instant Dissolve Tablets Superior Source Store Tablets	$11.99	50d	$19.99	View on Amazon
76	Source Naturals Serene Science L-Theanine, Made with Suntheanine, for Focused Relaxation, 200 mg - 120 Capsules Source Naturals Store Capsules	$12.07	120d	$48.29	View on Amazon
77	Nature's Way L-Theanine, Stress Support, Promotes Relaxation, 200 mg per 2-Capsule Serving, Vegan, 180 Capsules (Packaging May Vary) Nature's Way Store Capsules	$12.24	90d	$36.72	View on Amazon
78	Source Naturals Serene Science L-Theanine with Magnesium and GABA - 60 Tablets Source Naturals Store Tablets	$12.25	30d	$12.25	View on Amazon
79	200mg L-Theanine & 150mg Vitamin C Liquid Spray for Kids & Adults - Peach Extract Flavor - Plant-Based, Non-GMO, Gluten Free, No Added Sweeteners, Alcohol-Free - 2 Fl Oz (60 ml) - 60 Day Supply GIVOL Store Liquid	$12.90	60d	$25.80	View on Amazon
80	Natures Craft High Absorption L-Theanine Liquid Drops - Nootropic Focus Supplement with L Theanine 200mg Per Serving and Chamomile Extract - Adults and Kids Relaxation and Focus - 2 Fl Oz (2 Pack) Natures Craft Store Liquid	$13.00	60d	$25.99	View on Amazon
81	L Theanine Liquid Drops, Pure L-Theanine 400mg for Adults and Kids, Organic High Absorption L Theanine Supplement, Natural Focus Supplement, Non-GMO \| Gluten Free \| 30 Servings JINGYAT Store Liquid	$13.97	60d	$13.97	View on Amazon
82	L-Theanine Gummies for Kids & Adults, L'Theanine 400mg Chewable L Theanine Supplement for Calm, Zzz & Relaxation Support, Vegan, Organic, Raspberry Flavor, 60 Counts XIAAN Store Gummies	$13.99	60d	$13.99	View on Amazon
83	SOLARAY L-Theanine 200mg with Green Tea - Healthy Mood, Relaxation and Occasional Stress Support - Lab Verified, Vegan, Gluten Free - 90 Servings, 90 VegCaps SOLARAY Store Capsules	$14.95	90d	$44.84	View on Amazon
84	SFI Health Klaire Labs L-Theanine - 100mg Suntheanine to Promote Promote Relaxation (60 Capsules) SFI Health Store Capsules	$15.50	30d	$30.99	View on Amazon
85	High Absorption L-Theanine Liquid Drops - Nootropic Focus Supplement with L Theanine 200mg Per Serving and Chamomile Extract Supplement for Adults and Kids Relaxation and Focus - 2 Fl Oz Natures Craft Store Liquid	$15.99	30d	$15.99	View on Amazon
86	SOLARAY L Theanine 200mg, Mood Support Supplement with Vitamin B6 - Calming Support During Occasional Stress - Natural Lemon Lime Flavor - 60-Day Guarantee, Lab Verified - 75 Servings, 75 Chewables SOLARAY Store Tablets	$16.80	75d	$41.99	View on Amazon
87	Natural Factors Suntheanine L-Theanine 100 mg - Health Supplement for Calm Outlook - L-Theanine Supplement Supports Relaxing Sleep & Aids Against Drowsiness - 120 Chewable Tablets (60 Servings) Natural Factors Store Tablets	$17.84	60d	$35.67	View on Amazon
88	SmarterVitamins 200mg Caffeine Pills - MCT Oil from 100% Coconuts + 100mg L-Theanine, Energy and Focus, Extended Release Capsule, 50 Liquid Softgels SmarterVitamins Store Softgels3rd-party tested	$17.90	25d	$29.84	View on Amazon
89	GNC L-Theanine 200mg, Promotes Relaxation, 60 Capsules Capsules	$17.99	60d	$35.99	View on Amazon
90	Life Extension L-Theanine, Amino Acid theanine, Calm, Relaxation, Mood, Gluten-Free, Non-GMO, Vegetarian, 200 mg, 60 Capsules Life Extension Store Capsules	$18.00	30d	$18.00	View on Amazon
91	Svasthya Body & Mind 100% Pure L-Theanine Liquid Supplement – 2FL. OZ. (60ML) for Stress Reduction, Improved Concentration Svasthya Store LiquidFew reviews	$18.57	29d	$17.95	View on Amazon
92	MEENCCD L-Theanine Gummies 400mg, Sugar-Free L-Theanine Supplement for Focus Support, Vegan, Non-GMO, Raspberry Flavor, 60 CountCount MEENCCD Store GummiesFew reviews	$18.95	60d	$18.95	View on Amazon
93	Life Extension Enhanced Stress Relief, Lemon Balm Extract, L-theanine, decompress with This Supplement for Stress, Gluten-Free, Non-GMO, Vegetarian, 30 Capsules Life Extension Store Capsules	$19.55	30d	$19.55	View on Amazon
94	FWS L Theanine Liquid Drops, 200mg 99% Pure Bioactive L-Theanine, Organic, Natural, Vegan, Non GMO Helps to Promote Calmness, Relaxation, Improved Mood, Restful Sleep, for Adults and Kids FIREWATERSTAR HEALTH SUPPLEMENTS Store Liquid	$19.99	30d	$19.99	View on Amazon
95	duwhot L Theanine 400mg Gummies, L-Theanine Supplements for Adults & Kids \| Natural Stress Relief, Relaxation, Zzz & Focus Support, Organc,Vegan, Low Sugar, Non-Drowsy, Lemon Flavor, 60 Chewables duwhot Store Gummies	$19.99	60d	$19.99	View on Amazon
96	Wiley's Finest Relax Focus - Daily Supplement for Stress Support - Contains L-Theanine, GABA, Vitamin B6 & Magnesium - 30 Capsules (30 Servings) Wiley's Finest Store CapsulesFew reviews	$19.99	30d	$19.99	View on Amazon
97	EZ Melts L-Theanine 200 mg - Stress & Relaxation Support Supplement - No Artificial Flavors - No Drowsiness - Non-GMO & Vegan - Sweet Cherry - 120 Dissolvable Tablets (60 Servings) EZ Melts Store Tablets	$20.50	60d	$40.99	View on Amazon
98	KAL Mood Magnesium Powder with L-Theanine - Mandarin Flavor Magnesium Supplement - Relaxation Support, High Absorption, No Added Sugar, Vegan, Gluten Free, Made Without Soy - 40 Servings, 9.8 oz KAL Store Powder	$20.70	40d	$27.60	View on Amazon
99	MARYRUTH'S L Theanine 200mg Liquid Drops \| Mood Support for Adults & Kids \| Focus Supplement \| Natural Sleep Support \| Vegan \| Non-GMO \| Gluten Free \| 30 Servings (Pack of 2) Liquid	$21.95	60d	$43.90	View on Amazon
100	MaryRuth's L Theanine 200mg Liquid Drops \| Mood Support for Adults & Kids \| Focus Supplement \| Natural Sleep Support \| Vegan \| Non-GMO \| Gluten Free \| 30 Servings MARYRUTH'S Store Liquid	$21.95	30d	$21.95	View on Amazon
101	kindnature L-Theanine 200mg Gummies for Kids 4+ & Adults – Pure Single-Ingredient Calm & Focus Chewables – Clinical Dose, Non-Drowsy Relaxation – Vegan, Mixed Berry, Non-GMO – 60 Ct kindnature Store Gummies	$21.95	30d	$21.95	View on Amazon
102	KEY ELEMENTS Liquid GABA with L Theanine Supplement \| GABA 500mg and L-Theanine 200mg with Lemon Balm Extract and Magnesium with Vitamin B6 KEY ELEMENTS Store Liquid	$21.99	30d	$21.99	View on Amazon
103	Liposomal L Theanine Gummies, Chewable L-Theanine 400mg with GABA Supplement for Kids & Adults, Stress Relief, zzZ and Relaxation, Focus Support, Natural Blueberry Flavor, 60 Count Elysx Store Gummies	$21.99	60d	$21.99	View on Amazon
104	EZ Melts L-Theanine 200 mg - Stress & Relaxation Support Supplement - No Artificial Flavors - No Drowsiness - Non-GMO & Vegan - Sweet Cherry - 60 Dissolvable Tablets (30 Servings) EZ Melts Store Tablets	$21.99	30d	$21.99	View on Amazon
105	Integrative Therapeutics L-Theanine - Amino Acid Supplement for Stress & Relaxation Support* - Vegan, Gluten-Free & Dairy-Free - Third-Party Tested - 60 Capsules (30 Servings) Integrative Therapeutics Store Capsules	$22.00	30d	$22.00	View on Amazon
106	THORNE - Theanine - 200 mg of L-Theanine - Supports a Healthy Stress Response, Relaxation, Focus, Memory & Positive Mood - Increases Brain Alpha-Wave Production* - Third-Party Certified - 90 Capsules THORNE Store Capsules3rd-party tested	$22.67	90d	$68.00	View on Amazon
107	Dr. Mercola L-Theanine Plus GABA - 200 mg of L-Theanine and 100 mg of GABA (Gamma-Aminobutyric Acid) per Serving - 180 Capsules (90 Servings) Dr. Mercola Store Capsules	$24.99	90d	$74.97	View on Amazon
108	Lunakai USA Made Magnesium Glycinate Gummies 426mg with L-Theanine – Calm, Sleep, Stress Relief for Adults & Kids, Non-GMO, Vegan, 60ct Lunakai Store Gummies	$25.95	8d	$25.95	View on Amazon
109	MegaFood L-Theanine & Vitamin B Complex with Vegan B12, B6, Folate, Biotin & More - 200 mg L Theanine Supplement - B Complex Vitamins for Women & Men - Plus Lemon Balm & Zinc - 60 Tablets, 30 Servings MegaFood Store Tablets	$26.99	30d	$26.99	View on Amazon
110	DAVINCI Labs Liposomal L-Theanine - Dietary Supplement to Support Stress Management, Concentration, Focus and Relaxation* - Vegetarian - Gluten and Soy-Free - Dairy-Free - 30 ml DAVINCI Store LiquidFew reviews	$27.88	25d	$46.46	View on Amazon
111	Pure Encapsulations L-Theanine - Amino Acid Supplement to Support Relaxation, Stress & Nervous System* - 120 Capsules Pure Encapsulations Store Capsules	$28.75	120d	$115.00	View on Amazon
112	Dr. Mercola L-Theanine Plus GABA - Supports Relaxation - Focus & Cognitive Function - Stress Support Supplement - 200 mg L-Theanine - 100 mg GABA - 60 Capsules Dr. Mercola Store Capsules	$29.97	30d	$29.97	View on Amazon
113	L-Theanine 200mg with Saffron, GABA, Magnesium Glycinate & Vitamin B6, Advanced Complex Formula for Mood Relaxation & Stress Relief & Sleep Support, 60 Vegan Capsules, Non GMO, Gluten-Free HojaSana Store Capsules	$31.10	30d	$31.10	View on Amazon
114	Pure Encapsulations L-Theanine - Amino Acid Supplement to Support Relaxation, Stress & Nervous System* - 60 Capsules Pure Encapsulations Store Capsules	$32.75	60d	$65.50	View on Amazon
115	Quicksilver Scientific Liposomal GABA + L Theanine - Calm, Stress Response & Brain Support - Bioavailable GABA Supplement with L Theanine 100mg (1.7oz/50ml) Quicksilver Scientific Store Liquid	$44.40	13d	$37.00	View on Amazon
116	Designs for Health Liposomal NeuroCalm - Liquid GABA + L-Theanine to Support Calm + Healthy Stress Response (25 Servings / 1.7oz) Designs for Health Store Liquid	$50.99	13d	$42.49	View on Amazon

What this L-Theanine comparison normalizes

Live table role

This is the current ranking surface for L-Theanine. It recalculates cost per month from product price, Supplement Facts active amount, servings per container, and the dose you enter above.

Data coverage

120 active products have enough price and label data to calculate cost before display filters; 116 rows are currently shown in the ranked table. The current review floor for this category is 25+ reviews before any large-category and duplicate/bulk filtering.

Price landscape

At 200 mg/day, visible products range from $0.48-$50.99/mo with a $9.50/mo median midpoint and a 106.2x low-to-high spread.

Buying notes for L-Theanine

How to read the label

L-Theanine labels are usually easy to read, but still confirm the serving size and whether the product is standalone. Labels reviewed for this update included 200 mg one-capsule or one-softgel servings, 400 mg two-capsule servings, bulk powder servings, and products using branded forms such as Suntheanine or AlphaWave.

What changes the real cost

Powder can be extremely cheap per 200 mg serving, while capsules, tablets, softgels, liquids, and gummies add convenience premiums. Products bundled with caffeine, MCT oil, magnesium, or sleep/stress ingredients can cost more because they are selling a stack, not just L-Theanine.

Common comparison traps

A 400 mg serving may mean two capsules, and an L-Theanine + caffeine softgel may not fit shoppers who want caffeine-free theanine. Branded forms can be useful quality signals, but compare the actual L-Theanine amount and serving count before paying extra.

Evidence context

L-Theanine has moderate evidence for relaxation, stress, and sleep-quality outcomes. TrueServing compares labeled L-Theanine cost at the reference dose; it does not rank nootropic stacks, caffeine ratios, branded ingredients, or sleep claims.

TrueServing participates in the Amazon Associates program. We may earn a commission when you purchase through our links at no extra cost to you. Prices are updated regularly but may vary.

L-Theanine, ranked by real cost

Live table role

Data coverage

Price landscape

Buying notes for L-Theanine

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