NEW
🍵 L-Theanine
Cost per serving
$0.80
amino · 16 active deals
The best-value L-Theanine right now is about $0.07 per dose — across 14 tracked products the median is $0.329/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 $0.07 per serving.
Every L-Theanine deal above is ranked by real cost per dose with no paid placement — see our and .
1 of 5 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.
NatureBell L-Tryptophan Complex - 300 - Triple Strength 1 at $0.07 — the lowest cost-per-dose l-theanine in our catalog. See the full ranking on the Best L-Theanine page.
We're tracking 16 active L-Theanine deals across Amazon US and partner retailers, ranked by community votes and cost-per-dose — not paid placement.
Across 14 tracked L-Theanine deals the median cost-per-dose is $0.329; the cheapest quartile comes in under $0.237 . Anything below the median is a solid deal for the same molecule.
Deals are submitted by the community and ranked by net votes (hot minus cold) plus cost-per-dose normalised across container sizes. We take no affiliate kickbacks for ordering; sponsored slots, when present, are clearly badged.
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.
Cost per serving
$0.80
Cost per serving
$0.34
60 servings · ~60-day supply
Cost per serving
$0.42
Avg·−40%Cost per serving
$0.07
Cheap·−93%300 servings · ~300-day supply
Cost per serving
$1.20
30 servings · ~30-day supply
Cost per serving
$1.03
30 servings · ~30-day supply
Cost per serving
$0.58
50 servings · ~50-day supply
Cost per serving
$0.48
60 servings · ~60-day supply
Cost per serving
$0.30
Avg·−58%60 servings · ~60-day supply
Cost per serving
$0.18
Cheap·−81%90 servings · ~90-day supply
Cost per serving
$0.22
Cheap·−77%120 servings · ~120-day supply
Cost per serving
Cost per serving
$0.67
Pricey60 servings · ~60-day supply
Cost per serving
$0.30
Avg·−58%60 servings · ~60-day supply
Cost per serving
$0.73
Pricey30 servings · ~30-day supply
Cost per serving
$0.17
Cheap·−82%120 servings · ~120-day supply
Amazon.com · 🍵 L-Theanine
CPS
Price
$23.99
Amazon.com · 🫚 Ginger
CPS
Price
$20.66
Amazon.com · 🍵 L-Theanine
CPS
Price
$24.95
Amazon.com · 🍵 L-Theanine
CPS
Price
$19.99
Alani Nu · Amazon.com · 💪 Beta-Alanine
CPS
Price
$35.98
Alani Nu · Amazon.com · 💪 Beta-Alanine
CPS
Price
$30.87
Amazon.com · 💪 Creatine Monohydrate
CPS
Price
$28.99
Amazon.com · 🌿 Folate (Vitamin B9)
CPS
Price
$28.98
Amazon.com · 🍵 L-Theanine
CPS
Price
$17.99
Amazon.com · 🍵 L-Theanine
CPS
Price
$16.37
Amazon.com · 🍵 L-Theanine
CPS
Price
$25.99
Natural Factors · Amazon.com · 🍵 L-Theanine
CPS
Price
$18.87
Momentous · Amazon.com · 🍵 L-Theanine
CPS
Price
$39.99
Life Extension · Amazon.com · 🍵 L-Theanine
CPS
Price
$18.00
Amazon.com · 🍵 L-Theanine
CPS
Price
$21.95
NOW Foods · Amazon.com · 🍵 L-Theanine
CPS
Price
$20.75
30 servings · ~30-day supply
60 servings · ~60-day supply
$0.31
60 servings · ~60-day supply
