NOW Foods L-Theanine vs Nutricost L-Theanine

Q: Which is better, NOW Foods L-Theanine or Nutricost L-Theanine?

NOW Foods L-Theanine scores 85/100 while Nutricost L-Theanine scores 76/100 in our analysis. NOW Foods L-Theanine is the higher-rated product overall.

Q: Is NOW Foods L-Theanine worth the price compared to Nutricost L-Theanine?

NOW Foods L-Theanine scores 88.0/100 for value, while Nutricost L-Theanine scores 62.0/100. NOW Foods L-Theanine delivers better value overall.

Side-by-side comparison of scores, ingredients, prices and real customer feedback for NOW Foods L-Theanine and Nutricost L-Theanine.

Last verified: 26 Mar 2026 · Based on 93 reviews

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85.0

Score Summary

NOW Foods L-Theanine scores 85.0/100 vs Nutricost L-Theanine at 76.0/100. NOW Foods L-Theanine wins on ingredient quality, value for money, certifications. Nutricost L-Theanine 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	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 £17.82 Amazon UK → -19% deal	£8.36 Amazon UK → Cheapest
Price per Serving	£0.15 120 servings Best value	£8.36 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 -19% £21.90 £17.82

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 £8.36

View full review →

Score Breakdown: NOW Foods L-Theanine vs Nutricost L-Theanine

NOW Foods L-Theanine 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 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 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 or Nutricost L-Theanine? ▼

NOW Foods L-Theanine scores 85.0/100 overall while Nutricost L-Theanine scores 76.0/100. NOW Foods L-Theanine comes out ahead, scoring higher on effectiveness (82.0 vs 82.0). NOW Foods L-Theanine 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 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 worth the price compared to Nutricost L-Theanine? ▼

NOW Foods L-Theanine costs £17.82 while Nutricost L-Theanine is £8.36. For value, NOW Foods L-Theanine scores 88.0/100 vs Nutricost L-Theanine's 62.0/100. NOW Foods L-Theanine 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 scores 89.0/100 for side effects (higher means fewer reported issues) while Nutricost L-Theanine scores 90.0/100. Reviewers report fewer side effects with Nutricost L-Theanine. 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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