L Theanine
L Theanine shows low returns (0.0%), but prices mostly outside the sweet spot ($4.98–$17.18) keeps it on the watch list.
Flapen Score
Is L Theanine profitable on Amazon?
According to Flapen's Amazon United Kingdom niche tracking, L Theanine is a £742K/yr Amazon United Kingdom market (580K searches/yr). The top 5 brands hold 73% of demand. Demand peaks in Apr–May. Verdict: Worth a look — 53/100.
L Theanine: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Worth a look. Search demand moved +1.8% over the last 90 days and 14.8% of searches end in a purchase.
£742K
revenue / yr
Who owns the niche?
The top 5 brands hold 73% of demand, so 27% of the market is open.
27%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.4★ — the gap to enter on.
0/100
page quality · 15 products
Top L Theanine products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
L Theanine 400mg Capsules - 99.6% Pure L-Theanine | 5 Months Supply - 150 Capsules | Supports Relaxation & Focus Promotes Calm | Zero Additives Vegan & Non-GMO | GMP - Certified Lab Tested
- Price
- £9.48
- Rating
- 4.6/5
- Reviews
- 171
- Age
- 1y ago
L Theanine Enriched with Vitamin B6 - High Strength L-Theanine Capsules 400mg Natural Nootropics from Green Tea - 120 Vegan Capsules - Made in The UK Supplements by New Leaf
- Price
- £7.99
- Rating
- 4.5/5
- Reviews
- 729
- Age
- 2y ago
L Theanine 400mg | 120 Vegan Capsules - 4 Months Supply | Good Alternative to L-Theanine Powder Gummies and Drops | UK Made LTheanine Supplement
- Price
- £7.73
- Rating
- 4.6/5
- Reviews
- 473
- Age
- 2y ago
Nutricost L-Theanine 200mg 120 Capsules - Non-GMO Gluten Free
- Price
- £6.66
- Rating
- 4.4/5
- Reviews
- 9,555
- Age
- 10y ago
L-Theanine Green Tea Extract with Added Lemon Balm Extract and Chelated Magnesium Glycinate - Derived from Green Tea Leaves - Sleep & Relaxation Support - Mental Clarity
- Price
- £5.53
- Rating
- 4.0/5
- Reviews
- 46
- Age
- 6mo ago
Trending
90-day click momentum
L Theanine Gummies - 200 mg L-Theanine Supplement with Lemon Balm & Vitamin B6 - Supports Nervous System & Hormonal Function - Vegan Halal - 60 Count - Novomins
- Price
- £11.47
- Rating
- 4.4/5
- Reviews
- 35
- Age
- 6mo ago
L-Theanine Green Tea Extract with Added Lemon Balm Extract and Chelated Magnesium Glycinate - Derived from Green Tea Leaves - Sleep & Relaxation Support - Mental Clarity
- Price
- £5.53
- Rating
- 4.0/5
- Reviews
- 46
- Age
- 6mo ago
Natures Best L Theanine 200mg 60 Capsules (2 Month Supply)
- Price
- £10.71
- Rating
- 4.7/5
- Reviews
- 49
- Age
- 9mo ago
L Theanine 400mg Capsules - 99.6% Pure L-Theanine | 5 Months Supply - 150 Capsules | Supports Relaxation & Focus Promotes Calm | Zero Additives Vegan & Non-GMO | GMP - Certified Lab Tested
- Price
- £9.48
- Rating
- 4.6/5
- Reviews
- 171
- Age
- 1y ago
Ashwagandha KSM 66 Complex 3000mg Enhanced with L-Tryptophan & Vitamin B6 (2 Month Supply) Ashwagandha High Strength Capsules with 250mg Extract (Not Gummies or Powder) - Vegan UK Made
- Price
- £7.26
- Rating
- 4.4/5
- Reviews
- 6,943
- Age
- 3y ago
Newest
by launch dateL-Theanine Green Tea Extract with Added Lemon Balm Extract and Chelated Magnesium Glycinate - Derived from Green Tea Leaves - Sleep & Relaxation Support - Mental Clarity
- Price
- £5.53
- Rating
- 4.0/5
- Reviews
- 46
- Age
- 6mo ago
L Theanine Gummies - 200 mg L-Theanine Supplement with Lemon Balm & Vitamin B6 - Supports Nervous System & Hormonal Function - Vegan Halal - 60 Count - Novomins
- Price
- £11.47
- Rating
- 4.4/5
- Reviews
- 35
- Age
- 6mo ago
Natures Best L Theanine 200mg 60 Capsules (2 Month Supply)
- Price
- £10.71
- Rating
- 4.7/5
- Reviews
- 49
- Age
- 9mo ago
L-Theanine 400mg with BioPerine | 120 Vegan Capsules | High Absorption & Bioavailablity L Theanine | Enhanced Sleep at Night | Boost Focus & Relieve Stress | 4 Months Supply | UK Made | by NutriVolv
- Price
- £5.73
- Rating
- 4.4/5
- Reviews
- 59
- Age
- 10mo ago
L Theanine 400mg Capsules - 99.6% Pure L-Theanine | 5 Months Supply - 150 Capsules | Supports Relaxation & Focus Promotes Calm | Zero Additives Vegan & Non-GMO | GMP - Certified Lab Tested
- Price
- £9.48
- Rating
- 4.6/5
- Reviews
- 171
- Age
- 1y ago
Competition: brands, sellers & click share
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.
Brands
14 falling
Sellers
18
Top-5 brand share
73%
Top 20: 100%
Top-5 click share
73%
Top 20: 100%
Open market
18%
- NUTRINATION22%
- NEW LEAF PRODUCTS21%
- Nutrivo12%
- Nutricost10%
- SS Sport Supplies9%
- WeightWorld8%
L Theanine demand & seasonality
Weekly search volume, with the niche's key stats alongside.
Peak months: Apr, May · busiest ÷ quietest = 2.0×
Top L Theanine search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- l theanine265K/yr
- l-theanine169K/yr
- l theanine 400mg22K/yr
- ltheanine25K/yr
- theanine26K/yr
- l-theanine 400mg10K/yr
- suntheanine7K/yr
- l theanine supplement34K/yr
- l theanine 100mg5K/yr
- l- theanine5K/yr
What reviews say buyers love and hate about L Theanine
What buyers mention most, as a share of all reviews.
What buyers love
69% of reviews“Helpful for sleep”
“appears to be well made”
“Great for anxiety”
“Good value for money”
“less brain fog”
What buyers complain about
56% of reviews“Not enough to be clinically effective at all”
“Didn't help with Sleep”
“Smelled absolutely awful”
“Ingredients have changed”
“After taking these for a few day I was experiencing really bad pain in my abdomen”
L Theanine return rate & reasons
Why buyers send it back, as a share of all return requests.
0.0%
Return rate
0%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common L Theanine questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
