---
title: "Lumen Metabolism Tracker — $3K/mo Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/health-household/lumen-metabolism-tracker"
last_updated: "2026-08-12T16:02:13.266Z"
locale: en
meta:
description: "Amazon product research for lumen metabolism tracker: $3K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for lumen metabolism tracker: $3K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Lumen Metabolism Tracker — $3K/mo Amazon US Product Research"
---
# **Lumen Metabolism Tracker**
**Skip it**
Soft demand (-47.0% this quarter) — this niche doesn't clear our bar today.
Market size 10Growth 2Conversion 8Competition 22Returns 68Price range 28Avg price 75Brand share 27Review moat 24Quality gap 96
**Quality gap**
**Incredible****3.9★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Great****$100.06**
avg listing price — sweet spot $15–$100
**Returns**
**Good****2.3%**
return rate — above 5% kills the launch gate
**Price range**
**Okay****$10.12–$313.16**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Okay****89%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Bad****5,351**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****74%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$38K**
$38K/yr · 62K searches
**Conversion**
**Bad****0.6%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-47.0%**
90-day search growth — must beat 0% to launch
**Signals**[** Quality Gap**](https://flapen.com/research/niches?market=us&signal=quality_gap "Avg rating < 4.0") [** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50") [** Out of Stock**](https://flapen.com/research/niches?market=us&signal=out_of_stock "OOS rate > 10%")
## **Is lumen metabolism tracker profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, lumen metabolism tracker is a $38K/yr Amazon United States market (62K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Skip it — 31/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **lumen metabolism tracker market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **500–750**
- avg 0–100/product
- **Revenue / yr**
- **$50K–$75K**
- units × avg price
- **Conversion rate**
- **0.6%**
- **Avg BSR**
- **#646**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **86%**
- **Out of stock**
- **25.6%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **173 days**
## **Competition: brands, sellers & click share**
The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**9 **▼falling
**Sellers**
**16**
**Top-5 brand share**
**89%**
Top 20: 100%
**Top-5 click share**
**74%**
Top 20: 100%
**Open market**
**7%**
- KETOSCAN37% - VNEXFU25% - Yugoo11% - Lumen9% - Keto-Mojo7% - EEKETONE4% - Open — no brand owns it (3 brands, 7%)
## **lumen metabolism tracker demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -47.0% search growth over the last 90 days.
15K10KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Oct, Nov, Dec · busiest ÷ quietest = 3.9×
[**Open Trend **](https://flapen.com/research/us/health-household/lumen-metabolism-tracker/trend)
## **Top lumen metabolism tracker search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **lumen metabolism tracker device**53K/yr-57.4%0.5% conv. - **lumen metabolism tracker**4K/yr+24.3%0.2% conv. - **metabolism tracker**3K/yr-5.3%1.2% conv. - **metabolism tracker device**3K/yr-42.9%0.0% conv. [**All search terms **](https://flapen.com/research/us/health-household/lumen-metabolism-tracker/search-terms)
## **Top lumen metabolism tracker products & what they sell for**
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$4K20%$8K30%$11K40%$15K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 14 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**KETOSCAN Mini V2 Breath Ketone Meter | Non-Invasive Ketone Monitor Keto & Low Carb Diet Tracker Fat Metabolism & Ketosis**KETOSCAN**$142.48**4.0★1,005 rev](https://www.amazon.com/dp/B07R1TW6H3) [2**Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #7**VNEXFU**$39.31**3.8★27 rev](https://www.amazon.com/dp/B0GCLLBS1M) [3**Upgraded Breath Ketone Meter Professional Ketone Breath Analyzer Accuracy Ketosis Breath Tester Breath Ketosis Meter for Keto Lifestyle & Fitness Trace**Yugoo**$75.97**3.8★34 rev](https://www.amazon.com/dp/B0DM1ZB4XB) [4**Lumen Metabolism Tracker Device - Measure Real-Time Fat & Carb Burn Daily Nutrition Meal Plans Metabolic Health Weight Loss Athletic Fitness & Performance for Men & Women w/ 12 Month Subscription**Lumen**$313.16**4.0★93 rev](https://www.amazon.com/dp/B0F9FV2KCM) [5**KETOSCAN SMART Breath Ketone Meter | Self-Replace Sensor Ketone Monitor for Keto & Low Carb Diet Fat Metabolism Tracker**KETOSCAN**$178.64**3.7★45 rev](https://www.amazon.com/dp/B0C26JJ68X)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #7**VNEXFU**$39.31**27 rev6mo ago](https://www.amazon.com/dp/B0GCLLBS1M) [**Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #10**VNEXFU**$44.18**27 rev6mo ago](https://www.amazon.com/dp/B0GCLT8LCY) [**Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #6**VNEXFU**$43.05**2 rev6mo ago](https://www.amazon.com/dp/B0GCM6YGGT) [**Lumen Metabolism Tracker Device - Measure Real-Time Fat & Carb Burn Daily Nutrition Meal Plans Metabolic Health Weight Loss Athletic Fitness & Performance for Men & Women w/ 3 Month Subscription**Lumen**$243.41**93 rev1y ago](https://www.amazon.com/dp/B0F9FVJWGF) [**Lumen Metabolism Tracker Device - Measure Real-Time Fat & Carb Burn Daily Nutrition Meal Plans Metabolic Health Weight Loss Athletic Fitness & Performance for Men & Women w/ 12 Month Subscription**Lumen**$313.16**93 rev1y ago](https://www.amazon.com/dp/B0F9FV2KCM)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #10**VNEXFU**$44.18**3.8★**▲ 1000%**](https://www.amazon.com/dp/B0GCLT8LCY) [**Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #6**VNEXFU**$43.05**3.0★**▲ 1000%**](https://www.amazon.com/dp/B0GCM6YGGT) [**Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #7**VNEXFU**$39.31**3.8★**▲ 1000%**](https://www.amazon.com/dp/B0GCLLBS1M) [**KETOSCAN SMART Breath Ketone Meter | Self-Replace Sensor Ketone Monitor for Keto & Low Carb Diet Fat Metabolism Tracker**KETOSCAN**$178.64**3.7★**▲ 947%**](https://www.amazon.com/dp/B0C26JJ68X) [**Keto Breath Meter Tracing Diet Ketosis Status Keto Breath Analyzer with 10 Mouthpieces**EEKETONE**$28.99**2.4★**▲ 673%**](https://www.amazon.com/dp/B0DFXTS2ZG)
**~~View all trending →~~**
## **What reviews say buyers love and hate about lumen metabolism tracker**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**23%
*“easy to carry”*
**Accuracy-Overall**13%
*“Accurate and Easy”*
**Advertised Vs Actual Product**8%
*“As described”*
**Value For Money**8%
*“Good Value”*
**Quality-Overall**8%
*“Excellent product”*
**Health Monitoring**5%
*“this is the perfect way to easily monitor my health progress”*
**Instructions/User Manual/Troubleshooting**4%
*“Easy to follow instructions”*
**Efficiency**4%
*“Does the job”*
**Measurement/Reading Accuracy**3%
*“Its simple, accurate, and really helps keep me accountable”*
**Blood Sugar Level**2%
*“Great tool for tracking glucose”*
### **What buyers complain about **
**Functionality-Overall**14%
*“Did not work”*
**Measurement/Reading Accuracy**13%
*“Not for accurate readings”*
**Accuracy-Overall**10%
*“Not at all accurate”*
**Value For Money**9%
*“Very expensive”*
**Color**8%
*“Color is off”*
**Durability**7%
*“Not Durable at all”*
**Ease Of Use**7%
*“difficult to navigate”*
**Quality-Overall**4%
*“This is either poor quality control, a mfg”*
**Battery Life**3%
*“Battery dies after every use”*
**Instructions/User Manual/Troubleshooting**3%
*“No help in the directions eg Blue is this”*
### **Top return reasons **
**Measurement/Reading Accuracy**21%
**Functionality-Overall**20%
**Breathability**7%
**Accuracy-Overall**7%
**Advertised Vs Actual Product**6%
**Value For Money**5%
**Ease Of Use**4%
**Color**3%
**Battery Inclusion**3%
**Size-Overall**3%
## **Common lumen metabolism tracker questions**
- **Is lumen metabolism tracker profitable to sell on Amazon United States?**
- The niche generates $38K/yr across 14 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -47.0%. Flapen's verdict: Skip it (31/100).
- **How competitive is the lumen metabolism tracker niche?**
- 9 brands and 16 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 89% of demand.
- **What do buyers complain about in lumen metabolism tracker?**
- Top complaints mined from reviews: Functionality-Overall, Measurement/Reading Accuracy, Accuracy-Overall. The return rate is 2.3%.
- **When does demand for lumen metabolism tracker peak?**
- Demand peaks in Oct–Nov–Dec; the busiest month runs 3.9× the quietest.
- **What does it cost to enter the lumen metabolism tracker niche?**
- Listings span $10.12–$313.16; the average listing price is $100.06 (sweet spot $15–$100). The average incumbent carries 5,351 reviews — the moat a new listing must climb.
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