L-Theanine
Sleep & Relaxation· Health Canada NPN 80139018

L-Theanine

150 Capsules

Each capsule delivers 250mg of pharmaceutical-grade L-theanine for calm focus without the jitters.

6 peer-reviewed studies informed this formulation
✓ Third-party tested ✓ Made in Canada ✓ Health Canada NPN ✓ Skip/pause/cancel anytime
L-Theanine
L-Theanine
$21.97
Add to Cart
● Health Canada NPN Registered
● Third-Party Tested Every Lot
● GMP-Certified Canadian Facility
● 60-Day Money-Back Guarantee
Why this formula

Bioavailable forms. Precision dosing.

L-theanine is a non-essential amino acid naturally found in green tea leaves. Pharmaceutical-grade L-theanine — the form used here — has been studied for its association with alpha-wave brain activity, the state linked to calm focus.

Each capsule delivers 250mg of pharmaceutical-grade L-theanine, the strength research has used most often. No fillers, no synthetic excipients beyond the vegan HPMC capsule itself.

Health Canada has reviewed and licensed this formulation under NPN 80139018. Each lot is third-party tested at an independent Canadian lab.

  • 250mg pharmaceutical-grade L-theanine per capsule
  • Single-ingredient simplicity
  • Vegan HPMC capsules
  • Made in Canada · GMP-certified
  • Health Canada NPN 80139018
Research behind this formulation
  • Lu K, Gray MA, Oliver C et al. (2004) — Human Psychopharmacology 19(7):457–465 — 200 mg L-theanine, relaxation subscale in healthy volunteers.
  • Kimura K, Ozeki M, Juneja LR, Ohira H (2007) — Biological Psychology 74(1):39–45 — 200 mg L-theanine, acute mental-arithmetic stressor.
  • Hidese S, Ogawa S, Ota M et al. (2019) — Nutrients 11(10):2362 — 200 mg/day L-theanine over 4 weeks.

Studies provided for educational context. Product claims are limited to those reviewed by Health Canada under each product's NPN.

How & when to use

A simple daily routine.

01

1 capsule

Take one capsule daily, with food.

02

Consistent timing

Pick a time that fits your routine and stick with it.

03

With water

Plain water is best.

04

Stay consistent

Most customers notice the formula's full effect after 2-4 weeks.

Compare

How Kasha compares.

An honest read on what's standard in the category — including where alternatives are perfectly fine.

Kasha
Drugstore brand
Premium DTC
Standardized extract
✓
—
✓
Dose to research range
✓
Low
Mid
Third-Party Tested Every Lot
✓
Periodic
✓
Health Canada NPN registered
✓
✓
—
Made in Canada
✓
Often
Rarely
Price per serving
From $0.10
$0.20–$0.40
$0.80+

Structure-function framing only — efficacy is not implied by third-party testing or NPN registration.

Common questions about this product

What people ask before buying.

More questions live on the FAQ hub →

Can I take this with my prescription medication? +

We recommend speaking with your physician or pharmacist before combining any natural health product with prescription medication — they can assess for potential interactions based on what you're already taking.

How long until I notice the formula's effect? +

Most customers notice the formula's effect after 2–4 weeks of consistent daily use. Natural Health Products work cumulatively, so daily consistency matters more than dose timing.

Can I stop the subscription anytime? +

Yes — skip, pause, swap or cancel anytime from your account. Two clicks, no email or call required.

Are these capsules vegetarian? +

Yes — HPMC vegetable cellulose capsules. No gelatin.

Often paired with

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60d
Money-Back Guarantee — Open or Unopened
NPN
Health Canada Registered & Reviewed
GMP
Manufactured In a GMP-Certified Canadian Facility
3PT
Third-Party Tested Every Lot