SUPPLEMENTS·SPORTS RESEARCH
Sports Research L-Theanine 200mg
4.6 · 15,000 shopper ratings
Editor score7.9/10
Best for: Buyers who want a named, third-party-tested form
Lowest price we found
$19.95
At Amazon (as of – Details)
Buy at Amazon · $19.95 ↗Review updated 2026-07-03
Active
L-theanine (Suntheanine) 200mg
Form
MCT-oil softgel
Count
60 softgels
The branded-form option — Suntheanine L-theanine in coconut-oil softgels, third-party tested, at a premium over the plain-capsule version.
L-theanine is an amino acid found in tea leaves. Sports Research uses the patented Suntheanine form in MCT-oil softgels, third-party tested, at 200mg per softgel — 60 to a bottle. The trade against NOW's version is a named form and a third-party seal for a higher price per unit.
Price & where to buy
Prices checked 2026-10-11amazon
AmazonBest price✓ Fast delivery · easy returns
L-theanine (Suntheanine) 200mg
$19.95
(as of – Details)
Walmart
Walmart
Availability + price vary by store
Price varies
Not price-checked
Target
Target
Availability + price vary by store
Price varies
Not price-checked
Prices shown were last checked on 2026-10-11 and can change at any time — the price on the retailer's site at checkout is the one that applies. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product. As an Amazon Associate and affiliate we may earn a commission on purchases made through these links, at no extra cost to you.
How our prices work
We show the price at our recommended retailer as at our last check of that offer (2026-10-11) and the manufacturer's list price for comparison. Amazon prices come from Amazon's own product data service and are refreshed twice a day; each one shows the date and time Amazon gave it, and one older than 24 hours is replaced by “Check price”. Other retailers' prices are checked by hand and show the date of that check. Retail prices move constantly, so the price on the retailer's own page at checkout is the one that applies. More on Amazon prices
Should you buy it?
What we like
- Patented Suntheanine form, named on the label
- Third-party tested
- Softgel rather than a dry capsule
What to know before buying
- Costs more per unit than NOW's basic theanine
- Softgels are coconut-derived (allergy note)
- 60 softgels per bottle against NOW's 120 capsules
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At a glance
ActiveL-theanine (Suntheanine) 200mg
FormMCT-oil softgel
Count60 softgels
Certification3rd-party tested, patented form
Best forNamed, third-party-tested form
Compare with alternatives
Quick verdicts for the supplements most often considered alongside the Sports Research L-Theanine 200mg.
VS·HEAD-TO-HEAD
Sports Research L-Theanine 200mg vs NOW Foods L-Theanine 200mg (120ct)
The best-value pure L-theanine — 200mg per capsule, GMP-certified, and $15.79 for 120 servings.
→ Single-ingredient theanine at the lowest cost per capsule
VS·HEAD-TO-HEAD
Sports Research L-Theanine 200mg vs Doctor's Best High Absorption Magnesium Glycinate 200mg (240ct)
The highest-rated magnesium on Amazon — 240 tablets from Doctor's Best.
→ Value-focused buyers, athletes
VS·HEAD-TO-HEAD
Sports Research L-Theanine 200mg vs Nested Naturals LUNA Sleep Aid
The kitchen-sink botanical — melatonin, valerian, chamomile, L-theanine and magnesium in one capsule, with a melatonin-free version for purists.
→ One-capsule botanical stacks, melatonin-free option
Decision support · what no other comparison site has
Take the quiz · 60 secNot sure which one is right for you?
Our 60-second sleep score quiz asks 8 questions and recommends the right sleep gear for your goals. Free, no signup.
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Frequently asked questions
Theanine vs melatonin?
See /natural-sleep-remedies for what the trial evidence actually shows on each.
Suntheanine vs generic theanine?
Suntheanine is a patented single-isomer L-theanine made by Taiyo. Generic listings often don't state which isomer mix they contain. The practical difference here is that this label names its form and a generic one may not.
Can I take it with coffee?
We don't publish dosing or combination guidance — ask a pharmacist or your doctor.
Softgel vs capsule?
An MCT-oil softgel versus NOW's dry veg capsule. Sports Research charges more for the softgel format and the named form; NOW is cheaper per unit and ships 120 against this bottle's 60.
Affiliate disclosure: SleepyHero earns a small commission when you buy through these links. It doesn't cost you extra. Reviews and rankings are editorial — we don't accept payment for placement.