---
title: "Magox 400 — $5K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/health-household/magox-400"
last_updated: "2026-08-12T18:24:03.381Z"
locale: en
meta:
description: "Amazon product research for magox 400: $5K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for magox 400: $5K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Magox 400 — $5K/mo Amazon US Product Research (2026)"
---
# **Magox 400**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 16Growth 44Conversion 100Competition 2Returns 100Price range 64Avg price 77Brand share 0Review moat 23Quality gap 20
**Conversion**
**Incredible****24.5%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$15.60**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$8.38–$26.69**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+15.0%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****8,013.83**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$62K**
$62K/yr · 16K searches
**Competition**
**Bad****98%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
## **Is magox 400 profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, magox 400 is a $62K/yr Amazon United States market (16K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in May. Verdict: Skip it — 39/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **magox 400 market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **4K–5K**
- avg 750–1,000/product
- **Revenue / yr**
- **$62K–$78K**
- units × avg price
- **Conversion rate**
- **24.5%**
- **Avg BSR**
- **#482**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **33%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **83 months**
- **Avg seller age**
- **165 days**
## **Competition: brands, sellers & click share**
The top 5 products capture 98% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**2 **▼falling
**Sellers**
**25**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**98%**
Top 20: 100%
**Open market**
**0%**
- Mag-Ox 40094% - P Puregen Labs6% - Open — no brand owns it (0%)
## **magox 400 demand & seasonality**
Weekly Amazon search volume, last 61 weeks — +15.0% search growth over the last 90 days.
900700Spike '25Holiday '25Spike '26 seasonJunJulAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: May · busiest ÷ quietest = 1.8×
[**Open Trend **](https://flapen.com/research/us/health-household/magox-400/trend)
## **Top magox 400 search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **magox 400**6K/yr-0.9%21.0% conv. - **mag ox 400 magnesium**4K/yr+130.6%16.7% conv. - **magox magnesium oxide 400mg tablets**3K/yr+24.9%24.1% conv. - **mag ox 400**3K/yr-30.1%20.5% conv. [**All search terms **](https://flapen.com/research/us/health-household/magox-400/search-terms)
## **Top magox 400 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%15%$9K30%$19K45%$28K60%$37K1K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 6 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Mag-Ox High Potency Magnesium Supplement Tablets 120 Count Pack of 2**Mag-Ox 400**$20.51**4.7★9,875 rev](https://www.amazon.com/dp/B08871J5MN) [2**Mag-Ox Magnesium Supplement Pharmaceutical Grade Magnesium Oxide 483mg Most Concentrated Form of Magnesium 120 Tablets**Mag-Ox 400**$10.55**4.7★9,875 rev](https://www.amazon.com/dp/B004CXBLAO) [3**Mag-Ox High Potency Magnesium Supplement Tablets 60 Count**Mag-Ox 400**$8.38**4.7★9,875 rev](https://www.amazon.com/dp/B006SVZTNI) [4**Mag-Ox 400 Magnesium Mineral Dietary Supplement Tablets 483 mg Magnesium Oxide Pharmaceutical Grade 120 Count (Pack of 2)**Mag-Ox 400**$26.69**4.8★1,996 rev](https://www.amazon.com/dp/B001G7QM0I) [5![Magnesium 400mg [High Potency] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps Relaxation - 3 Pack | Total 360 Count](https://m.media-amazon.com/images/I/51CE4Xk3SjL.jpg)**Magnesium 400mg \[High Potency\] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps Relaxation - 3 Pack | Total 360 Count**P Puregen Labs**$18.73**4.6★8,231 rev](https://www.amazon.com/dp/B09M923WY7)
**~~View all top sellers →~~**
### **Newest**
by launch date
[![Magnesium 400mg [High Potency] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps Relaxation - 3 Pack | Total 360 Count](https://m.media-amazon.com/images/I/51CE4Xk3SjL.jpg)**Magnesium 400mg \[High Potency\] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps Relaxation - 3 Pack | Total 360 Count**P Puregen Labs**$18.73**8,231 rev4y ago](https://www.amazon.com/dp/B09M923WY7) [![Magnesium 400mg [High Potency] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps and Relaxation 120 Tablets](https://m.media-amazon.com/images/I/41A9+SJ9rLL.jpg)**Magnesium 400mg \[High Potency\] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps and Relaxation 120 Tablets**P Puregen Labs**$8.72**8,231 rev5y ago](https://www.amazon.com/dp/B08SJV83TX) [**Mag-Ox High Potency Magnesium Supplement Tablets 120 Count Pack of 2**Mag-Ox 400**$20.51**9,875 rev6y ago](https://www.amazon.com/dp/B08871J5MN) [**Mag-Ox High Potency Magnesium Supplement Tablets 60 Count**Mag-Ox 400**$8.38**9,875 rev14y ago](https://www.amazon.com/dp/B006SVZTNI) [**Mag-Ox Magnesium Supplement Pharmaceutical Grade Magnesium Oxide 483mg Most Concentrated Form of Magnesium 120 Tablets**Mag-Ox 400**$10.55**9,875 rev17y ago](https://www.amazon.com/dp/B004CXBLAO)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Mag-Ox High Potency Magnesium Supplement Tablets 60 Count**Mag-Ox 400**$8.38**4.7★**▲ 49%**](https://www.amazon.com/dp/B006SVZTNI) [**Mag-Ox Magnesium Supplement Pharmaceutical Grade Magnesium Oxide 483mg Most Concentrated Form of Magnesium 120 Tablets**Mag-Ox 400**$10.55**4.7★**▲ 23%**](https://www.amazon.com/dp/B004CXBLAO) [![Magnesium 400mg [High Potency] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps and Relaxation 120 Tablets](https://m.media-amazon.com/images/I/41A9+SJ9rLL.jpg)**Magnesium 400mg \[High Potency\] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps and Relaxation 120 Tablets**P Puregen Labs**$8.72**4.6★**— 3%**](https://www.amazon.com/dp/B08SJV83TX) [![Magnesium 400mg [High Potency] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps Relaxation - 3 Pack | Total 360 Count](https://m.media-amazon.com/images/I/51CE4Xk3SjL.jpg)**Magnesium 400mg \[High Potency\] Supplement Magnesium Oxide for Immune Support Muscle Recovery Leg Cramps Relaxation - 3 Pack | Total 360 Count**P Puregen Labs**$18.73**4.6★**▼ 12%**](https://www.amazon.com/dp/B09M923WY7) [**Mag-Ox High Potency Magnesium Supplement Tablets 120 Count Pack of 2**Mag-Ox 400**$20.51**4.7★**▼ 15%**](https://www.amazon.com/dp/B08871J5MN)
**~~View all trending →~~**
## **What reviews say buyers love and hate about magox 400**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**19%
*“GOOD VALUE”*
**Quality-Overall**18%
*“Good quality supplement”*
**Magnesium**16%
*“Best supplement for those needing this kind of magnesium”*
**Advertised Vs Actual Product**8%
*“As advertised”*
**Sleep Quality**6%
*“Good for sleeping”*
**Efficiency**4%
*“Does the job well”*
**Ease Of Chewing/Swallowing**3%
*“Easy to swallow”*
**Vitamin**3%
*“Great supplement”*
**Acid Regulator/Stomach Ache Relief**2%
*“Doesn't upset your stomach”*
**Muscle Pain Relief**2%
*“and no muscle spasms”*
### **What buyers complain about **
**Magnesium**13%
*“Can't be real magnesium oxide”*
**Sleep Quality**12%
*“This product did not help with sleep”*
**Functionality-Overall**11%
*“Didn't work”*
**Value For Money**7%
*“Pretty expensive and it didnt really work for me if it works for you great”*
**Side Effects**4%
*“Tongue burning”*
**Dosage**4%
*“don't take them together”*
**Ingredients-Overall**4%
*“This product has a cancer causing ingredient in it beware”*
**Strength**4%
*“Too strong causes shakiness and fatigue”*
**Advertised Vs Actual Product**4%
*“Deceptive label”*
**Safety Standards**4%
*“No child safety cap”*
### **Top return reasons **
**Magnesium**38%
**Charging**38%
**Side Effects**13%
**Dosage**13%
## **Common magox 400 questions**
- **Is magox 400 profitable to sell on Amazon United States?**
- The niche generates $62K/yr across 6 tracked products. 90-day search growth is +15.0%. Flapen's verdict: Skip it (39/100).
- **How competitive is the magox 400 niche?**
- 2 brands and 25 sellers compete. The top 5 products take 98% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in magox 400?**
- Top complaints mined from reviews: Magnesium, Sleep Quality, Functionality-Overall. The return rate is 0.0%.
- **When does demand for magox 400 peak?**
- Demand peaks in May; the busiest month runs 1.8× the quietest.
- **What does it cost to enter the magox 400 niche?**
- Listings span $8.38–$26.69; the average listing price is $15.60 (sweet spot $15–$100). The average incumbent carries 8,014 reviews — the moat a new listing must climb.
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