thorne l theanine
Worth a lookShows low returns (0.0%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Incredible15.1%search→purchase rate — share of searches ending in a sale
Avg price
Incredible$46.22avg listing price — sweet spot $15–$100
Price range
Incredible$19.05–$84.81cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Great$1.1M$1.1M/yr · 157K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Growth
Bad-2.1%90-day search growth — must beat 0% to launch
Review moat
Bad6,334.71avg incumbent reviews — the moat a new listing must climb
Competition
Bad93%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, thorne l theanine is a $1.1M/yr Amazon United States market (157K searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
thorne l theanine market data
- Units sold / yr
- 20K–25K
- avg 3,000–4,000/product
- Revenue / yr
- $924K–$1.2M
- units × avg price
- Conversion rate
- 15.1%
- Avg BSR
- #189
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 2.2%
- Avg brand age
- 73 months
- Avg seller age
- 152 days
Competition & brand share
The top 5 products capture 93% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 falling
Sellers
28
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
93%
Top 20: 100%
Open market
0%
- THORNE68%
- Momentous19%
- Life Extension5%
- Pure Encapsulations4%
- Sports Research4%
Demand & seasonality
Weekly Amazon search volume, last 98 weeks — -2.1% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 3.4×
Top thorne l theanine search terms
- thorne l theanine33K/yr
- thorne theanine16K/yr
- momentous magnesium l-threonate17K/yr
- l theanine thorne10K/yr
- thorne magnesium l-threonate12K/yr
- thorne l-theanine9K/yr
- momentous magnesium9K/yr
- thorne magnesium threonate8K/yr
- l-theanine thorne5K/yr
- magnesium l-threonate thorne6K/yr
Top thorne l theanine products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 7 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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
THORNE$66.044.7★831 rev
Momentous Magtein Magnesium L-Threonate - Brain & Rest Support Supplement - Boosts Cognitive Function & Sleep Quality - NSF Certified for Sport -145 mg - 30 Servings
Momentous$48.134.6★732 rev
THORNE - Deep Sleep Complex - All-Natural Sleep Supplement - Supports Sleep Quality & All Phases of the Sleep Cycle* - with L-Theanine Chamomile & Maizinol - Third-Party Certified - 60 Capsules
THORNE$51.143.8★87 rev
Life Extension Neuro-Mag Magnesium L-Threonate Memory Health Quick Thinking Cognitive Health Support Vegetarian Non-GMO 90 Vegetarian Capsules (144 mg from 2000 mg Magtein magnesium L-threonate
Life Extension$29.034.6★24,278 rev
Pure Encapsulations CogniMag 120s - Magnesium-L-Threonate Supplement - Supports Brain Health & Memory* - Includes Magtein & Polyphenol Blend - 120 Capsules
Pure Encapsulations$84.814.6★522 rev
Newest
by launch dateTHORNE - Deep Sleep Complex - All-Natural Sleep Supplement - Supports Sleep Quality & All Phases of the Sleep Cycle* - with L-Theanine Chamomile & Maizinol - Third-Party Certified - 60 Capsules
THORNE$51.1487 rev
THORNE - Magnesium Glycinate - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - Chelated Magnesium Capsules - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Servings
THORNE$25.372,660 rev
Momentous Magtein Magnesium L-Threonate - Brain & Rest Support Supplement - Boosts Cognitive Function & Sleep Quality - NSF Certified for Sport -145 mg - 30 Servings
Momentous$48.13732 rev
Life Extension Neuro-Mag Magnesium L-Threonate Memory Health Quick Thinking Cognitive Health Support Vegetarian Non-GMO 90 Vegetarian Capsules (144 mg from 2000 mg Magtein magnesium L-threonate
Life Extension$29.0324,278 rev
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
Sports Research$19.0515,233 rev
Trending
90-day click momentumTHORNE - Deep Sleep Complex - All-Natural Sleep Supplement - Supports Sleep Quality & All Phases of the Sleep Cycle* - with L-Theanine Chamomile & Maizinol - Third-Party Certified - 60 Capsules
THORNE$51.143.8★
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
Sports Research$19.054.5★
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
THORNE$66.044.7★
Pure Encapsulations CogniMag 120s - Magnesium-L-Threonate Supplement - Supports Brain Health & Memory* - Includes Magtein & Polyphenol Blend - 120 Capsules
Pure Encapsulations$84.814.6★
Momentous Magtein Magnesium L-Threonate - Brain & Rest Support Supplement - Boosts Cognitive Function & Sleep Quality - NSF Certified for Sport -145 mg - 30 Servings
Momentous$48.134.6★
What buyers say about thorne l theanine
What buyers praise and complain about, mined from review topics.What buyers love
“Helps me sleep”
“the quality has been very consistent”
“Best magnesium”
“Love these vitamins”
“Do the work”
“price was fair”
“Less anxiety”
“Accurate description”
“they give this calm”
“Improves focus and memory”
What buyers complain about
“Didnt really help with my sleep”
“it didnt help”
“Price gouging”
“Poor Quality Control”
“Ive had much better results with different magnesium glycinate brands”
“These are huge”
“possible side effect”
“Stomach pain”
“so sometimes I have a little bit of a problem swallowing them”
“No one should ever take this high of a dose of this”
Top return reasons
Common questions
- Is thorne l theanine profitable to sell on Amazon United States?
- The niche generates $1.1M/yr across 7 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -2.1%. Flapen's verdict: Worth a look (51/100).
- How competitive is the thorne l theanine niche?
- 5 brands and 28 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in thorne l theanine?
- Top complaints mined from reviews: Sleep Quality, Functionality-Overall, Value For Money. The return rate is 0.0%.
- When does demand for thorne l theanine peak?
- Demand is steady year-round — the busiest month runs 3.4× the quietest.
- What does it cost to enter the thorne l theanine niche?
- Listings span $19.05–$84.81; the average listing price is $46.22 (sweet spot $15–$100). The average incumbent carries 6,335 reviews — the moat a new listing must climb.