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NOW Foods L-Theanine 200mg vs Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free

Side-by-side comparison of scores, ingredients, prices and real customer feedback for NOW Foods L-Theanine 200mg and Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free.

Last verified: 07 Apr 2026 · Based on 93 reviews

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85.0
Quick Answer

NOW Foods L-Theanine 200mg scores 85.0/100 vs Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free at 76.0/100. NOW Foods L-Theanine 200mg wins on ingredient quality, value for money, certifications. Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free is stronger on side effects.

How Do the Scores Compare?

NOW Foods L-Theanine 200mg
Nutricost L-Theanine 200mg,...
NOW Foods L-Theanine 200mg
NOW Foods L-Theanine 200mg
NOW Foods
 Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free
Nutricost L-Theanine 200mg,...
Nutricost
Overall Score 85.0 76.0
Effectiveness 82.0/100
Best
 82.0/100
Best
Ingredient Quality 91.0/100
Best
 75.0/100
Value for Money 88.0/100
Best
 62.0/100
Side Effects 89.0/100 90.0/100
Best
Certifications 90.0/100
Best
 58.0/100
Best Price £21.90 Amazon UK → £7.84 Amazon UK →
Cheapest
Price per Serving £0.18 120 servings
Best value
 £7.84 1 servings
Form Capsules Capsule
Dose 200mg L-theanine 2.2 Ounces
Third-Party Tested ✓ Yes ✗ No
Reviews Analysed 77 16

NOW Foods L-Theanine 200mg

Pros

  • ✓Promotes calm focus without drowsiness — the single most consistent user-reported benefit across dozens of reviews
  • ✓Highly effective as a caffeine stack — users report it eliminates jitters, hand tremors, and anxiety while preserving energy
  • ✓Excellent value: 120 capsules at 200mg per capsule lasts months even with daily use
  • ✓Clean, minimal formula using patented Suntheanine (pure L-isomer) plus 100mg inositol for added calming synergy

Cons

  • ✗Effects are subtle for some users — those expecting dramatic, immediate relaxation may be underwhelmed
  • ✗Rare paradoxical response: at least one reviewer reported worsened insomnia, likely due to mild serotonergic/alertness activity
  • ✗May interact with psychiatric medications (SSRIs, benzodiazepines, MAOIs) — users should consult a doctor
  • ✗Mild blood pressure-lowering effect may be a concern for those already prone to hypotension

Best For

Coffee drinkers wanting to eliminate caffeine jitters while keeping focus Office workers and students managing daily stress and mental fatigue People with mild anxiety seeking a non-sedating, non-prescription option Vegans and those avoiding allergens (gluten, dairy, soy, nuts, shellfish-free) Nootropic beginners looking for a well-researched, low-risk entry point
Amazon UK £21.90
View full review →

Nutricost L-Theanine 200mg, 120 ...

Pros

  • ✓Strong anxiety and stress reduction reported across the majority of reviews
  • ✓Highly effective for smoothing caffeine jitters and improving focus quality
  • ✓Notable sleep improvement, especially when combined with magnesium glycinate
  • ✓Well-tolerated with no side effects reported across all 12 reviews

Cons

  • ✗Price flagged as expensive relative to equivalent products on the market
  • ✗Sleep benefits may take 4–6 weeks to fully manifest for some users
  • ✗Third-party testing claimed in marketing copy but contradicted by product specs
  • ✗Not vegan — capsule shell may contain gelatin

Best For

Coffee and pre-workout users seeking to eliminate jitters Light sleepers or those with difficulty switching off at night People managing mild to moderate daily anxiety or stress Nootropic stackers looking for a clean calming base Anyone sensitive to sedating sleep aids who wants a gentler alternative
Amazon UK £7.84
View full review →

What does the data say about NOW Foods L-Theanine 200mg vs Nutricost L-Theanine 2...?

NOW Foods L-Theanine 200mg Winner 85.0/100

NOW Foods L-Theanine 200mg using patented Suntheanine is consistently praised by verified iHerb purchasers for delivering a calm, focused mental state without sedation — with the caffeine-pairing use case repeatedly highlighted as a standout benefit.

Effectiveness
NOW Foods L-Thea..
82.0/100
Nutricost L-Thea..
82.0/100
Ingredient Quality
NOW Foods L-Thea..
91.0/100
Nutricost L-Thea..
75.0/100
Value for Money
NOW Foods L-Thea..
88.0/100
Nutricost L-Thea..
62.0/100
Side Effects
NOW Foods L-Thea..
89.0/100
Nutricost L-Thea..
90.0/100
Certifications
NOW Foods L-Thea..
90.0/100
Nutricost L-Thea..
58.0/100

What are the key differences?

NOW Foods L-Theanine 200mg is best for: Coffee drinkers wanting to eliminate caffeine jitters while keeping focus, Office workers and students managing daily stress and mental fatigue
Nutricost L-Theanine 20.. is best for: Coffee and pre-workout users seeking to eliminate jitters, Light sleepers or those with difficulty switching off at night

Frequently Asked Questions

Which is better, NOW Foods L-Theanine 200mg or Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free? ▼
NOW Foods L-Theanine 200mg scores 85.0/100 overall while Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free scores 76.0/100. NOW Foods L-Theanine 200mg comes out ahead, scoring higher on effectiveness (82.0 vs 82.0). NOW Foods L-Theanine 200mg is best suited for Coffee drinkers wanting to eliminate caffeine jitters while keeping focus and Office workers and students managing daily stress and mental fatigue. Nutricost L-Theanine 200mg, 12 is better for Coffee and pre-workout users seeking to eliminate jitters and Light sleepers or those with difficulty switching off at night.
Is NOW Foods L-Theanine 200mg worth the price compared to Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free? ▼
NOW Foods L-Theanine 200mg costs £21.90 while Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free is £7.84. For value, NOW Foods L-Theanine 200mg scores 88.0/100 vs Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free's 62.0/100. NOW Foods L-Theanine 200mg delivers better value relative to its quality. Note that NOW Foods L-Theanine comes as capsules while Nutricost L-Theanine is capsule, which may affect your preference.
Which has fewer side effects? ▼
NOW Foods L-Theanine 200mg scores 89.0/100 for side effects (higher means fewer reported issues) while Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free scores 90.0/100. Reviewers report fewer side effects with Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free. For certification and testing, NOW Foods L-Theanine scores 90.0/100 vs Nutricost L-Theanine's 58.0/100. Always consult a healthcare professional before starting any supplement.

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Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.

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