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L-tryptophan
amino · 38 active deals
How much does L-tryptophan cost?
The best-value L-tryptophan right now is about $0.07 per dose — across the 37 we can price per dose the median is $0.167/dose, so shopping on cost-per-dose can cut your cost several-fold. Every L-tryptophan 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-tryptophan catalog is at $0.07 per serving.
Median $0.167/servingCheapest quartile under $0.137across 37 tracked L-tryptophan deals
Compare:
Goals:
Metabolic Maintenance L-Tryptophan - 500 mg L-Tryptophan…
Metabolic MaintenanceAmazon.com
$0.67/serving
$40.000°
Amazing Formulas L-Tryptophan Amino Acid Supplement | 500 Mg…
Amazing FormulasAmazon.com
$0.12/serving
$14.950°
High Strength L Tryptophan Capsules | L Tryptophan Supplement…
Healing AwakeningAmazon.com
$0.22/serving
$17.950°
Piping Rock L-Tryptophan 1500 mg | 90 Capsules | Free Form…
Piping RockAmazon.com
$0.11/serving
$9.990°
Amazing Formulas L-Tryptophan 1000mg 60 Tablets Supplement…
Amazing FormulasAmazon.com
$0.16/serving
$9.800°
Amazing Formulas L-Tryptophan 1000mg Tablets Supplement…
Amazing FormulasAmazon.com
$0.14/serving
$34.790°
Life Extension Optimized Tryptophan Plus 1000mg - L-Tryptophan…
Life ExtensionAmazon.com
$0.27/serving
$24.000°
Vitamatic L-Tryptophan 1000 mg, 120 Tablets, Double Strength
VitamaticAmazon.com
$0.12/serving
$14.990°
L-Tryptophan Capsules 1000mg per Serving - L Tryptophan…
Natures CraftAmazon.com
$0.12/serving
$14.990°
Horbäach L Tryptophan 1500mg Capsules | 240 Count | Nighttime…
HorbäachAmazon.com
$0.08/serving
$19.990°
NOW Foods Supplements, L-Tryptophan 1,000 mg, Double Strength…
NOW FoodsAmazon.com
$0.30/serving
$18.210°
Every L-tryptophan deal above is ranked by real cost per dose with no paid placement — see our and .
Independent testing
Independent third-party testing is 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-tryptophan deals — FAQ
- How much does L-tryptophan cost?
The cheapest l-tryptophan we track works out to $0.07 , against a typical $0.17 across the 37 we can price per dose — about $2.00 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-tryptophan page.
- What is the best-value L-tryptophan per dose?
NatureBell L-Tryptophan Complex - 300 - Triple Strength 1,300mg… at $0.07 — the lowest cost-per-dose l-tryptophan in our catalog. See the full ranking on the Best L-tryptophan page.
- How many L-tryptophan deals are live right now?
We're tracking 38 active L-tryptophan 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-tryptophan per dose?
Across the 37 L-tryptophan 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 $0.167; the cheapest quartile comes in under $0.137 . Anything below the median is a solid deal for the same molecule.
- How does VitaminDB rank L-tryptophan deals?
Related amino acids
References & sources
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.