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SUPPLEMENTS·NOW FOODS
NOW Foods L-Theanine 200mg (120ct)
4.7 · 12,840 reviews
Editor score8.4/10
Best for: Single-ingredient theanine at the lowest cost per capsule
Lowest price we found↓ $1.19 vs list
$15.80$16.99 list
At Amazon · checked 2026-08-28
Buy at Amazon · $15.80 ↗Updated 2026-07-01
Dose per capsule
200mg L-theanine
Form
Veg capsule
Count
120 veg capsules
The best-value pure L-theanine — 200mg per capsule, GMP-certified, and $15.79 for 120 servings.
L-theanine is an amino acid found in tea leaves. NOW Foods sells it as a single-ingredient capsule at 200mg, GMP-certified, 120 vegan capsules for $15.79 — about 13¢ a capsule against Sports Research's 30¢.
Price across 3 retailers
Prices checked 2026-07-01amazon
AmazonBest price✓ Fast delivery · easy returns
GMP-certified · vegan · 120 servings
$15.80
2026-08-28
Walmart
Walmart
Availability + price vary by store
Price varies
Price shown for comparison
Target
Target
Availability + price vary by store
Price varies
Price shown for comparison
Prices shown were last checked on 2026-07-01and can change at any time — the price on the retailer's site at checkout is the one that applies. 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 lowest price we found at our last check (2026-07-01) and the manufacturer's list price for comparison. Retail prices — Amazon's especially — move constantly, so treat these as a guide: the price shown on the retailer's own page at checkout is the one that applies. Tap through to see each retailer's current price.
Should you buy it?
What we like
- Cheapest per capsule of the theanine products here
- Single ingredient — nothing else in the capsule
- Trusted 50-year manufacturer, GMP-certified
- Vegan, non-GMO, gluten-free
What to know before buying
- Listed certification stops at GMP — that covers how it's made, not a test of what ends up in the bottle
- No branded form named on the listing
At a glance
Dose per capsule200mg L-theanine
FormVeg capsule
Count120 veg capsules
Cost per serving~14¢
ManufacturingGMP-certified
Non-GMOYes
VeganYes
Gluten-freeYes
Best forLowest cost per capsule
Compare with alternatives
Quick verdicts for the supplements most often considered alongside the NOW Foods L-Theanine 200mg (120ct).
VS·HEAD-TO-HEAD
NOW Foods L-Theanine 200mg (120ct) vs Nature Made Melatonin 5mg (240ct)
The USP-verified melatonin — 240 tablets at a low price per tablet.
→ USP-verification shoppers, value buyers
VS·HEAD-TO-HEAD
NOW Foods L-Theanine 200mg (120ct) 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
Decision support · what no other comparison site has
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Frequently asked questions
Does L-theanine make you sleepy?
See /natural-sleep-remedies for what the trial evidence actually shows.
How much L-theanine for sleep?
We don't publish dosing guidance — ask a pharmacist or your doctor.
NOW vs Suntheanine — which is better?
Suntheanine is a branded L-theanine made by Taiyo. This listing doesn't name a branded form, so check the ingredient line on the bottle if that matters to you. NOW is the cheaper of the two.
Can I take L-theanine every day?
We don't publish dosing guidance — ask a pharmacist or your doctor.
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