Suntheanine
FailDemand is soft, at -43.0% this quarter, so Suntheanine is a Fail.
- Flapen Score
- 48 / 100Ranks 7,720 of 14,768 Health & Household niches · −1 vs the category median of 4948
- Market size
- $757K/yr208K searches / yr
- 90-day growth
- -43.0%search demand this quarter
- Competition
- 79%top-5 click share · 8 brands · 43 sellers
Flapen Score
Suntheanine against its category
The dotted line is the Health & Household average. Past it, Suntheanine is stronger. Inside it, weaker.
Market
The Suntheanine market on Amazon at a glance
Shoppers on Amazon United States searched for Suntheanine 208K times last year and spent an estimated $757K. The top 5 brands take 93% of clicks. Demand peaks in Feb–Mar–Apr. Flapen scores it 48 out of 100, a Fail.
01 · Demand
An estimated 12.8% of those searches ended in a purchase.
Shoppers searched for this 208K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 12.8% of those searches ended in a purchase. Searches in the last 90 days moved -43.0% against the 90 days before. Searches, conversion and average price together put the market at an estimated $757K a year.
- Searches, last 12 months
- 208K
- Growth, 90 days vs prior 90
- -43.0%
- Conversion, latest week
- 12.8%
- Market size, estimated
- $757Ka year
- Peak month
- March3.9× the quietest month
- Top search term
- suntheanine103K searches a year
02 · Price
A sale here is worth $28.36.
Listings sell for $28.36 on average, from $11.91 to $66.04. Amazon reports units sold in ranges. This niche sold 25K to 30K a year. The average listing sells 3,000 to 4,000 of them. At $28.36 that is $85K to $113K a year per listing.
- Average price
- $28.36inside the $15 to $100 sweet spot
- Price range
- $11.91–$66.04
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 25K–30K
- Units per listing a year
- 3,000–4,000
- Revenue per listing a year
- $85K–$113K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
69% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #261 within Amino Acids. It carries 4,617 reviews at 4.58 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 69%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #261in Amino Acids
- Average rating
- 4.58 starsAmazon United States average 4.42 stars
- Average reviews
- 4,617per listing
- Listings tracked
- 13
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 74 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
- 74 months
Products
Top Suntheanine 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 25, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Natural Factors Suntheanine L-Theanine 100 mg - Health Supplement for Calm Outlook - L-Theanine Supplement Supports Relaxing Sleep & Aids Against Drowsiness - 60 Chewable Tablets (30 Servings)
- Price
- $18.37
- Rating
- 4.6/5
- Reviews
- 1,820
- Age
- 22y ago

Sports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus Relaxation & Alertness - Non-Drowsy Support Made with Coconut Oil Non-GMO & Gluten Free - 200mg 60 Count
- Price
- $19.05
- Rating
- 4.5/5
- Reviews
- 15,233
- Age
- 11y ago

Doctors Best L-Theanine Contains Suntheanine Helps Reduce Stress & Sleep Non-GMO Gluten Free Vegan 150 mg (DRB-00197) 90 Count
- Price
- $20.58
- Rating
- 4.6/5
- Reviews
- 2,490
- Age
- 16y ago

Natural Factors Suntheanine L-Theanine 100 mg - Health Supplement for Calm Outlook - L-Theanine Supplement Supports Relaxing Sleep & Aids Against Drowsiness - 120 Chewable Tablets (60 Servings)
- Price
- $34.90
- Rating
- 4.6/5
- Reviews
- 1,820
- Age
- 10y ago

Swanson Double Potency Suntheanine L-Theanine Calm and Focus Supplement for Stress-Prone Professionals Seeking Balanced Wellbeing - 200 mg (60 Veggie Capsules)
- Price
- $21.08
- Rating
- 4.4/5
- Reviews
- 136
- Age
- 13y ago
Trending
estimated 90-day click momentum
Doctors Best L-Theanine Caps 200mg for Men & Women - L Theanine AlphaWave Supplement for Calm & Focus Support Helps Reduce Stress Vegan Gluten Free Soy Free Non GMO - 60 Veg Capsules
- Price
- $15.60
- Rating
- 4.4/5
- Reviews
- 288
- Age
- 2y ago

Swanson Double Potency Suntheanine L-Theanine Calm and Focus Supplement for Stress-Prone Professionals Seeking Balanced Wellbeing - 200 mg (60 Veggie Capsules)
- Price
- $21.08
- Rating
- 4.4/5
- Reviews
- 136
- Age
- 13y ago

THORNE - Theanine - 200 mg of L-Theanine - Supports a Healthy Stress Response Relaxation Focus Memory & Positive Mood - Increases Brain Alpha-Wave Production* - Third-Party Certified - 90 Capsules
- Price
- $66.04
- Rating
- 4.7/5
- Reviews
- 831
- Age
- 21y ago

Sports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus Relaxation & Alertness - Non-Drowsy Support Made with Coconut Oil Non-GMO & Gluten Free - 200mg 60 Count
- Price
- $19.05
- Rating
- 4.5/5
- Reviews
- 15,233
- Age
- 11y ago

NOW Foods Supplements L-Theanine 200 mg with Inositol Stress Management* 120 Veg Capsules
- Price
- $21.33
- Rating
- 4.7/5
- Reviews
- 7,341
- Age
- 12y ago
Newest
by launch date
Doctors Best L-Theanine Caps 200mg for Men & Women - L Theanine AlphaWave Supplement for Calm & Focus Support Helps Reduce Stress Vegan Gluten Free Soy Free Non GMO - 60 Veg Capsules
- Price
- $15.60
- Rating
- 4.4/5
- Reviews
- 288
- Age
- 2y ago

Sports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus Relaxation & Alertness - Non-Drowsy Support Made with Coconut Oil Non-GMO & Gluten Free - 200mg 120 Count
- Price
- $36.54
- Rating
- 4.5/5
- Reviews
- 15,233
- Age
- 2y ago

Sports Research L-Theanine Supplement with Caffeine & Coconut MCT Oil - Focused Energy Alertness & Relaxation Without Drowsiness - 200mg L Theanine 100mg Organic Caffeine - 60 Liquid Softgels
- Price
- $22.03
- Rating
- 4.5/5
- Reviews
- 3,580
- Age
- 7y ago

Nutricost L-Theanine 200mg 120 Capsules Double Strength Gluten Free
- Price
- $11.91
- Rating
- 4.6/5
- Reviews
- 9,940
- Age
- 10y ago

Natural Factors Suntheanine L-Theanine 100 mg - Health Supplement for Calm Outlook - L-Theanine Supplement Supports Relaxing Sleep & Aids Against Drowsiness - 120 Chewable Tablets (60 Servings)
- Price
- $34.90
- Rating
- 4.6/5
- Reviews
- 1,820
- Age
- 10y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 79% of clicks. A locked shelf that new listings rarely crack.
Brands
8 falling
Sellers
43
Est. top-5 brand share
93%
Top 20: 100%
Est. top-5 click share
79%
Top 20: 100%
Open market
4%
- Natural Factors38%
- Sports Research34%
- Doctor's BEST12%
- Swanson5%
- NOW Foods3%
- Nutricost3%
- Open — no brand owns it (2 brands, 4%)
Demand
Suntheanine search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Feb, Mar, Apr · busiest ÷ quietest = 3.9×
Search terms
Top Suntheanine search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- suntheanine103K/yr
- suntheanine l-theanine31K/yr
- sports research l theanine24K/yr
- suntheanine l-theanine 200mg10K/yr
- doctors best l theanine8K/yr
- sports research l-theanine7K/yr
- l theanine sports research6K/yr
- l theanine suntheanine7K/yr
- sun theanine4K/yr
- sun theanine l-theanine4K/yr
Reviews and returns
What reviews say buyers love and hate about Suntheanine
We read the reviews and the return reasons for every product selling here.
“Not effective”
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.
20 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 Suntheanine 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









