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NOW Foods vs Sports Research L-Theanine (2026)
Disclosure: We earn commissions on purchases made through our links. This never influences our scores. Editorial policy
The Verdict
NOW Foods scores higher on our rubric (83 vs 78 on our 0-100 execution score) and is much cheaper, at about $0.17 per dose versus Sports Research's $0.31. Sports Research's advantage is branded Suntheanine, the form used in most L-theanine studies, plus Non-GMO Project Verification. In our view, if you want the researched Suntheanine form, Sports Research is worth the premium; if you want an effective 200mg L-theanine dose at the lowest cost, NOW Foods is the value pick. Both hit the clinically studied dose.
L-Theanine 200mg with Inositol
NOW Foods
Double Strength L-Theanine 200mg with Organic Coconut Oil
Sports Research
Head-to-Head Comparison
| Category | L-Theanine 200mg with Inositol NOW Foods | Double Strength L-Theanine 200mg with Organic Coconut Oil Sports Research |
|---|---|---|
| Brand Score | 83/100Winner | 78/100 |
| Dosing & Form | 25/25Winner | 25/25 |
| Purity | 13/25Winner | 13/25 |
| Value | 22/25Winner | 17/25 |
| Transparency | 23/25Winner | 23/25 |
| Cost/Day | $0.17Winner | $0.31 |
| Dose/Serving | 200mg | 200mg |
| Form | L-Theanine with Inositol | Suntheanine (L-Theanine) in organic coconut oil softgel |
| Third-Party Tested | No | No |
| Proprietary Blend | No | No |
Why This Comparison Matters
NOW Foods and Sports Research both deliver a 200mg L-theanine dose - the amount studied for calm focus and stress reduction - but take different approaches. Sports Research uses branded Suntheanine (a patented, pure L-isomer form) in a coconut oil softgel; NOW Foods pairs generic L-theanine with inositol at a lower price. This is the branded-Suntheanine-versus-value decision.
Suntheanine is the form used in much of the published L-theanine research, which is a point in its favor. Generic L-theanine works too, but standardization and purity vary more.
We scored both on evidence, quality, cost per dose, and transparency.
Detailed Score Breakdown
L-Theanine 200mg with Inositol
NOW Foods
200mg per capsule matching the clinical dose; includes inositol for added nervous system support
NPA A-rated GMP facility, but no product-level third-party testing (USP/NSF)
$0.17/day after a price rise - still outstanding value for a clinical-dose product from an established brand
Full label disclosure of dose, form, and all excipients
Best cost per effective dose among established brands; 120 capsules provides a 4-month supply
Double Strength L-Theanine 200mg with Organic Coconut Oil
Sports Research
200mg Suntheanine per capsule - the patented pure L-isomer form
Claims third-party testing but specific certifications not verified; GMP certified, Non-GMO Project Verified
$0.31/day after a price rise - still fair value for a patented Suntheanine product
Full disclosure of Suntheanine form, dose, and coconut oil carrier
Uses patented Suntheanine form suspended in organic coconut oil for potential absorption benefits at a competitive price
How We Compared These Products
Every product in our database is scored on four equally-weighted pillars: dosing accuracy and form quality, purity verification (third-party testing), cost per clinically effective dose (not cost per pill), and label transparency. Each pillar is worth 25 points for a total of 100.
Cost per effective dose is calculated using the clinically studied dose from published research, not the manufacturer's suggested serving. If a product requires multiple servings to reach the dose used in clinical trials, that cost is reflected in the value score.
For a full explanation of our scoring methodology, see our methodology page. Prices were last checked on the dates listed for each product and may have changed.
More L-Theanine Comparisons
We earn commissions on purchases made through our links. This never influences our scores or recommendations. See our editorial policy.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.