NEW
😴 L-tryptophan
Cost per serving
$0.67
Pricey
amino · 35 active deals
The best-value L-tryptophan right now is about $0.04 per dose — across 35 tracked products the median is $0.166/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.
Right now the best value across our full L-tryptophan catalog is at $0.04 per serving.
Every L-tryptophan deal above is ranked by real cost per dose with no paid placement — see our and .
Pure Original Ingredients L-Tryptophan (365 ) No Magnesium Or Rice… at $0.04 — the lowest cost-per-dose l-tryptophan in our catalog. See the full ranking on the Best L-tryptophan page.
We're tracking 35 active L-tryptophan deals across Amazon US and partner retailers, ranked by community votes and cost-per-dose — not paid placement.
Across 35 tracked L-tryptophan deals the median cost-per-dose is $0.166; the cheapest quartile comes in under $0.125 . 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
$0.67
PriceyCost per serving
$0.25
Avg120 servings · ~120-day supply
Cost per serving
$0.15
Avg·−60%60 servings · ~60-day supply
Cost per serving
$0.04
Cheap·−91%365 servings · ~365-day supply
Cost per serving
$0.08
Cheap·−83%120 servings · ~120-day supply
Cost per serving
$0.12
Cheap·−75%120 servings · ~120-day supply
Cost per serving
$0.14
Avg·−67%240 servings · ~240-day supply
Cost per serving
$0.15
Avg·−60%120 servings · ~120-day supply
Cost per serving
$0.40
Pricey90 servings · ~90-day supply
Cost per serving
$0.17
Avg·−50%240 servings · ~240-day supply
Cost per serving
$0.12
Cheap·−76%180 servings · ~180-day supply
Cost per serving
$0.32
Pricey60 servings · ~60-day supply
Cost per serving
$0.26
Pricey120 servings · ~120-day supply
Cost per serving
$0.19
Avg·−43%80 servings · ~80-day supply
Cost per serving
$0.11
Cheap·−78%90 servings · ~90-day supply
Cost per serving
$0.16
Avg·−52%120 servings · ~120-day supply
Cost per serving
$0.17
Avg·−51%60 servings · ~60-day supply
Cost per serving
$0.25
Avg120 servings · ~120-day supply
Cost per serving
$0.15
Avg·−62%240 servings · ~240-day supply
Cost per serving
$0.22
Avg·−35%90 servings · ~90-day supply
Cost per serving
$0.27
90 servings · ~90-day supply
Cost per serving
$0.17
Avg·−50%60 servings · ~60-day supply
Cost per serving
$0.17
Avg·−50%60 servings · ~60-day supply
Cost per serving
$0.69
Pricey180 servings · ~180-day supply
Amazon.com · 😴 L-tryptophan
CPS
Price
$40.00
Amazon.com · 😴 L-tryptophan
CPS
Price
$29.95
Amazon.com · 😴 L-tryptophan
CPS
Price
$8.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$15.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$9.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$14.95
Amazon.com · 😴 L-tryptophan
CPS
Price
$32.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$17.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$35.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$39.95
Amazon.com · 😴 L-tryptophan
CPS
Price
$21.57
Amazon.com · 😴 L-tryptophan
CPS
Price
$18.98
Amazon.com · 😴 L-tryptophan
CPS
Price
$31.63
Amazon.com · 😴 L-tryptophan
CPS
Price
$15.26
Amazon.com · 😴 L-tryptophan
CPS
Price
$9.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$19.50
Amazon.com · 😴 L-tryptophan
CPS
Price
$9.90
Amazon.com · 😴 L-tryptophan
CPS
Price
$29.67
Amazon.com · 😴 L-tryptophan
CPS
Price
$34.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$19.99
Amazon.com · 🔗 L-Lysine
CPS
Price
$24.00
Amazon.com · 😴 L-tryptophan
CPS
Price
$9.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$9.99
Amazon.com · 😴 L-tryptophan
CPS
Price
$124.50
60 servings · ~60-day supply
