Tryptophan
MaybeAn estimated 0.0% of orders come back. But demand is soft, at -10.4% this quarter, so Tryptophan is a Maybe.
- Flapen Score
- 64 / 100Top 5% of 14,768 Health & Household niches · +15 vs the category median of 4964
- Market size
- $1.2M/yr367K searches / yr
- 90-day growth
- -10.4%search demand this quarter
- Competition
- 55%top-5 click share · 16 brands · 39 sellers
Flapen Score
Tryptophan against its category
The dotted line is the Health & Household average. Past it, Tryptophan is stronger. Inside it, weaker.
Market
The Tryptophan market on Amazon at a glance
Shoppers on Amazon United States searched for Tryptophan 367K times last year and spent an estimated $1.2M. The top 5 brands take 71% of clicks. Flapen scores it 64 out of 100, a Maybe.
01 · Demand
An estimated 12.7% of those searches ended in a purchase.
Shoppers searched for this 367K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 12.7% of those searches ended in a purchase. Searches in the last 90 days moved -10.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated $1.2M a year.
- Searches, last 12 months
- 367K
- Growth, 90 days vs prior 90
- -10.4%
- Conversion, latest week
- 12.7%
- Market size, estimated
- $1.2Ma year
- Peak month
- October1.2× the quietest month
- Top search term
- tryptophan106K searches a year
02 · Price
A sale here is worth $26.33.
Listings sell for $26.33 on average, from $9.83 to $119.23. Amazon reports units sold in ranges. This niche sold 40K to 50K a year. The average listing sells 1,500 to 2,000 of them. At $26.33 that is $39K to $53K a year per listing.
- Average price
- $26.33inside the $15 to $100 sweet spot
- Price range
- $9.83–$119.23
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 40K–50K
- Units per listing a year
- 1,500–2,000
- Revenue per listing a year
- $39K–$53K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
76% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.6% of listings are out of stock. The average listing ranks #868 within Sleep & Snoring. It carries 1,480 reviews at 4.47 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 76%
- Prime listings
- 100%
- Out of stock, average day
- 0.6%
- Average rank
- #868in Sleep & Snoring
- Average rating
- 4.47 starsAmazon United States average 4.42 stars
- Average reviews
- 1,480per listing
- Listings tracked
- 21
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 72 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 72 months
Products
Top Tryptophan products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 12, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Nutricost L-Tryptophan 500mg 120 Capsules - with BioPerine Gluten Free Non-GMO
- Price
- $14.72
- Rating
- 4.5/5
- Reviews
- 2,420
- Age
- 9y ago

NOW Foods Supplements L-Tryptophan 500 mg Encourages Positive Mood* Supports Relaxation* 120 Veg Capsules
- Price
- $17.77
- Rating
- 4.5/5
- Reviews
- 5,743
- Age
- 24y ago

Pure Encapsulations L-Tryptophan | Amino Acid Supplement for Relaxation Serotonin Support PMS and Sleep* | 90 Capsules
- Price
- $69.35
- Rating
- 4.6/5
- Reviews
- 167
- Age
- 9y ago

Horbach L Tryptophan 1500mg Capsules | 240 Count | Nighttime Formula | Non-GMO Gluten Free Supplement
- Price
- $19.65
- Rating
- 4.4/5
- Reviews
- 2,393
- Age
- 7y ago

Life Extension Optimized Tryptophan Plus 1000mg - L-Tryptophan Supplement with Niacin and L-Lysine for Healthy Sleep & Stress Response Gluten-Free Non-GMO Vegetarian - 90 Capsules
- Price
- $23.80
- Rating
- 4.5/5
- Reviews
- 304
- Age
- 13y ago
Trending
estimated 90-day click momentum
L-Tryptophan Capsules 1000mg per Serving - L Tryptophan Supplement for Sleep Promotes Relaxation & Emotional Well-Being for Women & Men - Potent Pure Mood Support Supplement for Adults - 120 Count
- Price
- $13.22
- Rating
- 4.2/5
- Reviews
- 63
- Age
- 1y ago

Life Extension Optimized Tryptophan Plus 1000mg - L-Tryptophan Supplement with Niacin and L-Lysine for Healthy Sleep & Stress Response Gluten-Free Non-GMO Vegetarian - 90 Capsules
- Price
- $23.80
- Rating
- 4.5/5
- Reviews
- 304
- Age
- 13y ago

Pure Encapsulations L-Tryptophan | Amino Acid Supplement for Relaxation Serotonin Support PMS and Sleep* | 180 Capsules
- Price
- $119.23
- Rating
- 4.6/5
- Reviews
- 167
- Age
- 9y ago

BulkSupplements.com L-Tryptophan Capsules - Tryptophan Supplement L-Trptophan 500mg - Amino Acid Supplement Gluten Free - 1 Capsule per Serving 240 Capsules (Pack of 1)
- Price
- $18.71
- Rating
- 4.5/5
- Reviews
- 219
- Age
- 2y ago

NOW Foods Supplements L-Tryptophan 500 mg Encourages Positive Mood* Supports Relaxation* 60 Veg Capsules
- Price
- $12.07
- Rating
- 4.5/5
- Reviews
- 5,743
- Age
- 18y ago
Newest
by launch date
L-Tryptophan Capsules 1000mg per Serving - L Tryptophan Supplement for Sleep Promotes Relaxation & Emotional Well-Being for Women & Men - Potent Pure Mood Support Supplement for Adults - 120 Count
- Price
- $13.22
- Rating
- 4.2/5
- Reviews
- 63
- Age
- 1y ago

Bronson L-Tryptophan 500 MG High Potency Essential Amino Acid Supports Relaxation & Positive Mood Support Non-GMO 60 Capsules
- Price
- $10.00
- Rating
- 4.3/5
- Reviews
- 230
- Age
- 2y ago

BulkSupplements.com L-Tryptophan Capsules - Tryptophan Supplement L-Trptophan 500mg - Amino Acid Supplement Gluten Free - 1 Capsule per Serving 240 Capsules (Pack of 1)
- Price
- $18.71
- Rating
- 4.5/5
- Reviews
- 219
- Age
- 2y ago

Amazing Formulas L-Tryptophan 1000mg Tablets Supplement | Non-GMO | Gluten Free | Made in USA (240 Count)
- Price
- $34.79
- Rating
- 4.4/5
- Reviews
- 2,084
- Age
- 2y ago

Clean Nutraceuticals GABA 750mg 5 HTP 200mg L Tryptophan 500mg L Theanine 200mg Ashwagandha SAM-e L-Glycine - Mood Support Vitamins for Women and Men with L-Tyrosine 5-HTP (5-Hydroxytryptophan)
- Price
- $27.95
- Rating
- 4.4/5
- Reviews
- 2,629
- Age
- 3y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 55% of clicks. Leaders hold, but buyers still shop past them.
Brands
16 falling
Sellers
39
Est. top-5 brand share
71%
Top 20: 100%
Est. top-5 click share
55%
Top 20: 99%
Open market
24%
- NOW Foods28%
- Nutricost19%
- Life Extension8%
- Pure Encapsulations8%
- BulkSupplements7%
- Horbäach6%
Demand
Tryptophan search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.2×
Search terms
Top Tryptophan search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- tryptophan106K/yr
- l tryptophan63K/yr
- l-tryptophan45K/yr
- tryptophan supplement51K/yr
- triptofano18K/yr
- l tryptophan 500mg13K/yr
- triptofan supplements15K/yr
- tryptophan supplement for sleep15K/yr
- l tryptophan 1000mg8K/yr
- l-tryptophan 500mg10K/yr
Reviews and returns
What reviews say buyers love and hate about Tryptophan
We read the reviews and the return reasons for every product selling here.
“Did not work for sleep”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
15 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Tryptophan questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









