propionyl-l-carnitine
Skip itA concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Incredible$28.50avg listing price — sweet spot $15–$100
Price range
Incredible$22.89–$37.81cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Great367.25avg incumbent reviews — the moat a new listing must climb
Conversion
Great7.6%search→purchase rate — share of searches ending in a sale
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Growth
Bad-6.4%90-day search growth — must beat 0% to launch
Market size
Bad$64K$64K/yr · 30K searches
Competition
Bad100%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, propionyl-l-carnitine is a $64K/yr Amazon United States market (30K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Feb. Verdict: Skip it — 44/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
propionyl-l-carnitine market data
- Units sold / yr
- 3K–3K
- avg 250–500/product
- Revenue / yr
- $71K–$86K
- units × avg price
- Conversion rate
- 7.6%
- Avg BSR
- #150
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 75%
- Out of stock
- 0.0%
- Avg brand age
- 88 months
- Avg seller age
- 183 days
Competition & brand share
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.Brands
4 falling
Sellers
6
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
100%
Top 20: 100%
Open market
0%
- Biolor65%
- Life Extension17%
- Swanson11%
- VitaMonk6%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 103 weeks — -6.4% search growth over the last 90 days.Peak months: Feb · busiest ÷ quietest = 2.0×
Top propionyl-l-carnitine search terms
- propionyl-l-carnitine19K/yr
- propionyl-l-carnitine for men6K/yr
- propionyl l carnitine3K/yr
- propionyl2K/yr
Top propionyl-l-carnitine 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 4 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Biolor High Absorption Propionyl-L-Carnitine (PLCAR) No Artificial Fillers - Effective Propionyl L Carnitine HCL Supplement to Support Blood Circulation - 120 Capsules
Biolor$37.814.5★965 rev
Life Extension Optimized Carnitine Three Forms of L-carnitine Promotes Heart & Brain Health Gluten Free Non-GMO Vegetarian 60 Capsules
Life Extension$22.894.6★283 rev
Swanson Propionyl L-Carnitine with Glycine - Natural Supplement Promoting Heart Health & Energy Support - May Support Muscle Strength & Endurance - (60 Veggie Capsules)
Swanson$26.424.0★63 rev
VitaMonk GlycoTrax - High Absorption GPLC Supplement - No Artificial Fillers - GPLC Glycine Propionyl-L-Carnitine Capsules Supplements to Support Healthy Blood Flow - 60 Capsules
VitaMonk$26.894.1★158 rev
Newest
by launch dateBiolor High Absorption Propionyl-L-Carnitine (PLCAR) No Artificial Fillers - Effective Propionyl L Carnitine HCL Supplement to Support Blood Circulation - 120 Capsules
Biolor$37.81965 rev
Swanson Propionyl L-Carnitine with Glycine - Natural Supplement Promoting Heart Health & Energy Support - May Support Muscle Strength & Endurance - (60 Veggie Capsules)
Swanson$26.4263 rev
Life Extension Optimized Carnitine Three Forms of L-carnitine Promotes Heart & Brain Health Gluten Free Non-GMO Vegetarian 60 Capsules
Life Extension$22.89283 rev
VitaMonk GlycoTrax - High Absorption GPLC Supplement - No Artificial Fillers - GPLC Glycine Propionyl-L-Carnitine Capsules Supplements to Support Healthy Blood Flow - 60 Capsules
VitaMonk$26.89158 rev
Trending
90-day click momentumSwanson Propionyl L-Carnitine with Glycine - Natural Supplement Promoting Heart Health & Energy Support - May Support Muscle Strength & Endurance - (60 Veggie Capsules)
Swanson$26.424.0★
Life Extension Optimized Carnitine Three Forms of L-carnitine Promotes Heart & Brain Health Gluten Free Non-GMO Vegetarian 60 Capsules
Life Extension$22.894.6★
Biolor High Absorption Propionyl-L-Carnitine (PLCAR) No Artificial Fillers - Effective Propionyl L Carnitine HCL Supplement to Support Blood Circulation - 120 Capsules
Biolor$37.814.5★
VitaMonk GlycoTrax - High Absorption GPLC Supplement - No Artificial Fillers - GPLC Glycine Propionyl-L-Carnitine Capsules Supplements to Support Healthy Blood Flow - 60 Capsules
VitaMonk$26.894.1★
What buyers say about propionyl-l-carnitine
What buyers praise and complain about, mined from review topics.What buyers love
“Quality product”
“It gives me more energy”
“Exactly what I was expecting”
“Exercise endurance has improved”
“Exceptional supplement”
“No stomachache or headaches like with L-Argentine or L-Citrulline”
“This is the best product for Nitric Oxide production I have found so far”
What buyers complain about
“Brown and rancid looking”
“the smell was rancid”
Common questions
- Is propionyl-l-carnitine profitable to sell on Amazon United States?
- The niche generates $64K/yr across 4 tracked products. 90-day search growth is -6.4%. Flapen's verdict: Skip it (44/100).
- How competitive is the propionyl-l-carnitine niche?
- 4 brands and 6 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in propionyl-l-carnitine?
- Top complaints mined from reviews: Color Fading/Discoloration, Smell. The return rate is 0.0%.
- When does demand for propionyl-l-carnitine peak?
- Demand peaks in Feb; the busiest month runs 2.0× the quietest.
- What does it cost to enter the propionyl-l-carnitine niche?
- Listings span $22.89–$37.81; the average listing price is $28.50 (sweet spot $15–$100). The average incumbent carries 367 reviews — the moat a new listing must climb.