Nutricost L-Theanine 200 mg

Nutricost · Capsule · 200 mg

Price/day

€0.12

Dose

200 mg

Servings/pack

120

Pack price

€14.90

Transparency Index

7.7/10

Recommended Affordable L-theanine option. For premium quality: Suntheanine variants from Jarrow or Pure Encapsulations.

Rating breakdown

Evidence for ingredient 8.0/10

L-theanine has good evidence for alpha wave promotion, stress reduction, and synergy with caffeine.

Value for money 9.0/10

€0.12 per day for 200 mg L-theanine is excellent.

Product quality 7.0/10

Standard L-theanine, no Suntheanine branded ingredient, but adequate dosing.

Label honesty 8.0/10

200 mg L-theanine declared; clean ingredient list.

Third-party testing 7.0/10

ISO-certified production; third-party tested per label claim.

Product Description

Nutricost delivers 200 mg L-theanine per capsule — the green tea amino acid known for relaxed alertness. Promotes alpha brain waves without sedation.

What We Like

200 mg per capsule — clinically relevant dose
120 capsules = 4-month supply
Very affordable price
Ideal partner for caffeine stacking

What We’re Missing

Not Suntheanine branded (enzymatically produced, L-form only)
Less established brand than Jarrow or NOW
No specific L/D-isomer specification

Usage Recommendation

1 capsule daily, in the morning or as needed. Classic stack: 200 mg L-theanine + 100–200 mg caffeine for focused calm.

Other L-Theanine products

Jarrow Suntheanine L-Theanine 100mg

8.4/10

Recommended

Pure Encapsulations L-Theanine 200mg

8.3/10

Recommended

NOW Foods L-Theanine Double Strength 200mg

7.4/10

Recommended

Ingredient dossier

L-theanine promotes relaxed alertness via alpha-wave activation. Best evidence for caffeine synergy; moderate effects on stress markers. Alone, cognitive benefits are limited.

Read full dossier: L-Theanine →