Best L-Theanine Supplements Updated May 2025
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Best L-Theanine Supplements
2025 Buyer's GuideUpdated May 2025
Advertiser disclosure About our rankings
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Best L-Theanine Supplement

10.0

1

10.0

L-Theanine Supplement 200mg, 120 Capsules (Soy Free, Gluten Free, Non-GMO, Third Party Tested) Synergy with Magnesium L-Threona...
Stress relief
Sleep quality
Quality
Focus
Value for money
Sturdiness
10% Coupon
Picked by 114 people this week!
10% Coupon
Picked by 114 people this week!
Picked by 114 people this week!
Best L-Theanine Supplement

10.0

1
L-Theanine Supplement 200mg, 120 Capsules (Soy Free, Gluten Free, Non-GMO, Third Party Tested) Synergy with Magnesium L-Threona...
Stress relief
Sleep quality
Quality
Focus
Value for money
Sturdiness
Picked by 114 people this week!
10% Coupon

9.7

2

9.7

GABA L-Theanine 900 mg - Made in USA - Magnesium | Vitamin B6 - Calm, Sleep, Relaxation & Mood Support - 750 mg Gamma AminoButy...
Sleep quality
Works well
Value for money
Ingredients
Ease of swallowing
Side effects
20% Coupon
20% Coupon

9.7

2
GABA L-Theanine 900 mg - Made in USA - Magnesium | Vitamin B6 - Calm, Sleep, Relaxation & Mood Support - 750 mg Gamma AminoButy...
Sleep quality
Works well
Value for money
Ingredients
Ease of swallowing
Side effects
20% Coupon

9.4

3

9.4

L Theanine 400 mg | L-Theanine Stress Relief | Extra Strength Supplement | Made in USA | Relaxation, Sleep & Calm Support | For...
Sleep aid
Quality
Value for money
Onset time
20% Coupon
20% Coupon

9.4

3
L Theanine 400 mg | L-Theanine Stress Relief | Extra Strength Supplement | Made in USA | Relaxation, Sleep & Calm Support | For...
Sleep aid
Quality
Value for money
Onset time
20% Coupon
Premium Pick

9.2

4

9.2

NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 120 Veg Capsules
Calming effect
Functionality
Sleep quality
Value for money
Effectiveness
Quality
Premium Pick

9.2

4
NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 120 Veg Capsules
Calming effect
Functionality
Sleep quality
Value for money
Effectiveness
Quality

9.1

5

9.1

Integrative Therapeutics L-Theanine - L-Theanine to Support a Relaxed State* - Healthy Stress Response* - Vegan & Gluten-Free A...
Sleep quality
Quality
Value for money
Nutritional value
Focus
Effect

9.1

5
Integrative Therapeutics L-Theanine - L-Theanine to Support a Relaxed State* - Healthy Stress Response* - Vegan & Gluten-Free A...
Sleep quality
Quality
Value for money
Nutritional value
Focus
Effect

8.9

6

8.9

Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free
Sleep quality
Effectiveness
Value for money
Quality
Focus
Ease of swallow
Save 14%
Save 14%

8.9

6
Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free
Sleep quality
Effectiveness
Value for money
Quality
Focus
Ease of swallow
Save 14%

8.8

7

8.8

Nutricost L-Theanine 200mg, 240 Capsules - Double Strength
Sleep quality
Effectiveness
Value for money
Quality
Focus
Ease of swallow

8.8

7
Nutricost L-Theanine 200mg, 240 Capsules - Double Strength
Sleep quality
Effectiveness
Value for money
Quality
Focus
Ease of swallow

8.7

8

8.7

NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 60 Veg Capsules
Calming effect
Value for money
Amino acid content
Focus
Caffeine content
Save 47%
Save 47%

8.7

8
NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 60 Veg Capsules
Calming effect
Value for money
Amino acid content
Focus
Caffeine content
Save 47%
Best Value
Popular

8.6

9

8.6

L-Theanine 200mg by Nature's Trove - 120 Vegetarian Capsules
Sleep quality
Calming effect
Quality
Effectiveness
Value for money
Cognitive function
Best Value
Popular

8.6

9
L-Theanine 200mg by Nature's Trove - 120 Vegetarian Capsules
Sleep quality
Calming effect
Quality
Effectiveness
Value for money
Cognitive function

8.5

10

8.5

Sports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus, Relaxation & Alertness - Non-Drowsy Sup...
Relaxation
Quality
Effectiveness
Focus
Energy level
Ingredients
Save 9%
Save 9%

8.5

10
Sports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus, Relaxation & Alertness - Non-Drowsy Sup...
Relaxation
Quality
Effectiveness
Focus
Energy level
Ingredients
Save 9%

Our Top Choice

Best L-Theanine Supplement

10.0

1

10.0

L-Theanine Supplement 200mg, 120 Capsules (Soy Free, Gluten Free, Non-GMO, Third Party Tested) Synergy with Magnesium L-Threona...
Stress relief
Sleep quality
Quality
Focus
Value for money
Sturdiness
10% Coupon
Picked by 114 people this week!
10% Coupon
Picked by 114 people this week!
Picked by 114 people this week!
Best L-Theanine Supplement

10.0

1
L-Theanine Supplement 200mg, 120 Capsules (Soy Free, Gluten Free, Non-GMO, Third Party Tested) Synergy with Magnesium L-Threona...
Stress relief
Sleep quality
Quality
Focus
Value for money
Sturdiness
Picked by 114 people this week!
10% Coupon
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Related Categories
Apigenin SupplementAnxiety SupplementLeptin SupplementRhodiola SupplementLithium Orotate SupplementDewormer for Humans
Related Categories
Apigenin SupplementAnxiety SupplementLeptin SupplementRhodiola SupplementLithium Orotate SupplementDewormer for Humans