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L-Theanine
amino · 55 active deals
How much does L-Theanine cost?
The best-value L-Theanine right now is about $0.05 per dose — across the 29 we can price per dose the median is $0.166/dose, so shopping on cost-per-dose can cut your cost several-fold. Every L-Theanine deal here is ranked by cost per dose — what you actually pay per serving, not the sticker price — because forms and absorption differ, so the cheapest bottle isn’t always the cheapest dose.
Prices checked · live from the Amazon US catalog.
Right now the best value across our full L-Theanine catalog is at $0.05 per serving.
Median $0.166/servingCheapest quartile under $0.075across 29 tracked L-Theanine deals
Compare:
Goals:
When and how to take L-Theanine
L-theanine can be taken any time, with or without food. It is often paired with caffeine in the morning to smooth out jitters, or taken in the evening to unwind. It is not a sedative and will not make you drowsy.
Can you take L-Theanine with other supplements?
It combines safely with caffeine (a well-known calm-focus pairing) and with melatonin for sleep, since they work by different mechanisms.
General guidance on timing and absorption, not medical advice. Check with a clinician about your medications and conditions.
GABA Supplements 750mg with L-Theanine & 5HTP for Calm & Sleep…
LukareeAmazon.com
$0.23/serving
$20.990°
L-theanine 200mg per serving with Magnesium Glycinate
Micro IngredientsAmazon.com
$0.06/serving
$24.990°
Nootropics Depot L-Theanine Capsules 200mg (180 Count)…
Nootropics DepotAmazon.com
$0.17/serving
$29.990°
aSquared Nutrition Apigenin 50mg & L-Theanine 200mg…
aSquared NutritionAmazon.com
$0.33/serving
$39.950°
5-HTP 200mg with GABA, L-Theanine and Vitamin B6, 240 Softgels
Micro IngredientsAmazon.com
$0.07/serving
$16.990°
Vitamatic L-Theanine 200 mg with Caffeine 100 mg, 120 Tablets
VitamaticAmazon.com
$0.08/serving
$9.990°
BlueBonnet Nutrition L-Theanine 200 mg, 60 Vegetable Capsules
BluebonnetAmazon.com
$0.33/serving
$19.960°
Brain Supplement Alpha GPC 300mg Phosphatidylserine Bacopa…
Clean NutraceuticalsAmazon.com
$0.42/serving
$24.950°
Clean Nutraceuticals Melatonin 10mg Valerian Root L Theanine…
Clean NutraceuticalsAmazon.com
$0.42/serving
$24.950°
Saffron Extract Supplements 88.5mg for Women with Ashwagandha…
FlorvayAmazon.com
$0.30/serving
$17.990°
Saffron Supplements Extract for Stress & Mood Support – Affron…
EvolanceAmazon.com
$0.50/serving
$29.970°
Saffron Supplements with Ashwagandha & L-Theanine - 368.5MG…
HyberViveAmazon.com
$0.17/serving
$15.590°
L-Theanine 200mg Double Strength - Supports Healthy Sleep…
Double Wood SupplementsAmazon.com
$0.17/serving
$19.950°
Natural Factors Suntheanine L-Theanine 100 mg - Health…
Natural FactorsAmazon.com
$0.63/serving
$18.870°
Momentous L-Theanine Supplement - 200 mg Capsules to Promote…
MomentousAmazon.com
$0.67/serving
$39.990°
NOW Foods L-Theanine, Double Strength 200 mg Per Cap - 180 Veg…
NOW FoodsAmazon.com
$0.17/serving
$29.970°
L Theanine 400 mg | L-Theanine Stress Relief | Extra Strength…
NUTRAHARMONYAmazon.com
$0.17/serving
$19.890°
NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress…
NOW FoodsAmazon.com
$0.17/serving
$20.600°
Every L-Theanine deal above is ranked by real cost per dose with no paid placement — see our and .
Independent testing
2 of 40 tracked L-Theanine brands here are flagged as carrying independent third-party testing — a voluntary check of a product's identity, potency and contaminants by an outside lab. It's a quality signal, not a value or efficacy claim. Confirm any brand's current status on the official registries:
Testing status is self-reported by the brand or drawn from public certification and may change — always verify on the official registry before purchase.
L-Theanine deals — FAQ
- How much does L-Theanine cost?
The cheapest l-theanine we track works out to $0.05 , against a typical $0.17 across the 29 we can price per dose — about $1.42 a month at the cheapest. That is real from live Amazon US prices, not the sticker price. The full ranking is on the Best L-Theanine page.
- What is the best-value L-Theanine per dose?
Extra Strength L-Theanine Supplement 400mg, 400 (200mg Per Cap) at $0.05 — the lowest cost-per-dose l-theanine in our catalog. See the full ranking on the Best L-Theanine page.
- How many L-Theanine deals are live right now?
We're tracking 55 active L-Theanine deals across Amazon US and partner retailers, ranked by community votes and cost-per-dose — not paid placement.
- What's a good price for L-Theanine per dose?
Across the 29 L-Theanine deals we can price per dose (combination products are left out — their single label dose belongs to whichever ingredient the product is built around) the median cost-per-dose is $0.166; the cheapest quartile comes in under $0.075 . Anything below the median is a solid deal for the same molecule.
- How does VitaminDB rank L-Theanine deals?
L-Theanine guides
Related amino acids
References & sources
- Green Tea — NIH National Center for Complementary and Integrative Health
- USP Verified product participants — U.S. Pharmacopeia
- NSF certified products — NSF
We link primary sources and paraphrase their findings — never copy their text, tables, or images. Cost-per-dose figures are our own first-party catalog data.