---
title: "Magnesium Sulfate — $147K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/beauty-personal-care/magnesium-sulfate"
last_updated: "2026-08-11T11:31:55.130Z"
locale: en
meta:
description: "Niche score 47/100 · $147K/yr market · 156K searches/yr · $19.17 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $147K/yr market · 156K searches/yr · $19.17 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Magnesium Sulfate — $147K/yr Amazon US Niche (2026) - Flapen"
---
# **magnesium sulfate**
**Skip it**
Soft demand (-17.1% this quarter) — this niche doesn't clear our bar today.
Market size 32Growth 16Conversion 58Competition 48Returns 99Price range 75Avg price 85Brand share 58Review moat 20Quality gap 23
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$19.17**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$3.40–$49.78**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****4.9%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Good****70%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****56%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Okay****$147K**
$147K/yr · 156K searches
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****12,379.52**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-17.1%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United States niche tracking, magnesium sulfate is a $147K/yr Amazon United States market (156K searches/yr). The top 5 brands hold 70% of demand. Verdict: Skip it — 47/100.
Data updated Jul 15, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **magnesium sulfate market data**
- **Units sold / yr**
- **6K–8K**
- avg 100–250/product
- **Revenue / yr**
- **$115K–$153K**
- units × avg price
- **Conversion rate**
- **4.9%**
- **Avg BSR**
- **#472**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **83%**
- **Out of stock**
- **4.1%**
- **Avg brand age**
- **71 months**
- **Avg seller age**
- **154 days**
## **Competition & brand share**
The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▲rising
**Sellers**
**584**
**Top-5 brand share**
**70%**
Top 20: 100%
**Top-5 click share**
**56%**
Top 20: 97%
**Open market**
**21%**
- PURE ORIGINAL INGREDIENTS18% - Amazon Basics17% - Dr Clark Store14% - RUNMAG11% - Foster & Thrive10% - Epsoak8%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -17.1% search growth over the last 90 days.
5K3KSpike '24Spike '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/us/beauty-personal-care/magnesium-sulfate/trend)
## **Top magnesium sulfate search terms**
- **magnesium sulfate**86K/yr-0.1%4.0% conv. - **sulfato de magnesio**46K/yr-30.9%3.0% conv. - **sulfato de magnesio para tomar**10K/yr-54.0%3.4% conv. - **magnesium sulphate**5K/yr-14.2%3.8% conv. - **magnesium sulfate powder**5K/yr-22.7%7.8% conv. - **sulfato de magnesio en polvo**4K/yr-35.4%3.6% conv. [**All search terms **](https://flapen.com/research/us/beauty-personal-care/magnesium-sulfate/search-terms)
## **Top magnesium sulfate 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.
0%4%$6K8%$12K12%$18K16%$24K101001K10K100K1.0M Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 23 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Amazon Basics Epsom Salt Soak Unscented Magnesium Sulfate USP Muscle and Feet Relaxation Resealable Bag 3 Pound**Amazon Basics**$3.40**4.8★17,900 rev](https://www.amazon.com/dp/B0BXTS6L35) [2**RUNMAG Magnesium Sulfate Food Grade Powder 300g per Bottle**RUNMAG**$10.40**4.6★110 rev](https://www.amazon.com/dp/B0D32JZFT2) [3**Foster & Thrive 1 lb Pouch Epsom Salt Granules - Magnesium Sulfate USP 100% - Saline Laxative - Multi Purpose**Foster & Thrive**$9.36**4.7★446 rev](https://www.amazon.com/dp/B0DD67MKHQ) [4**Pure Original Ingredients Magnesium Sulfate (365 Capsules) No Rice Fillers Always Pure Lab Verified**PURE ORIGINAL INGREDIENTS**$39.96**4.5★41 rev](https://www.amazon.com/dp/B0CS266ZCW) [5**Dr Clark Store Magnesium Sulfate USP (Epsom Salt) 1030mg 100 Gelatin Capsules for Daily Digestive Support Occasional Constipation Relief and Foundational Systemic Wellness for Adults Made in USA**Dr Clark Store**$20.93**4.4★870 rev](https://www.amazon.com/dp/B07DQTVH88)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Magnesium Complex 700mg | 12-in-1 High Absorption Supplement | Glycinate Citrate Malate Taurate & More | Sleep Support Muscle Cramp Relief Stress Heart Bone & Nerve Health | 120 Vegan Capsules**Vccvaa**$10.18**2,613 rev1y ago](https://www.amazon.com/dp/B0FHH4CCD9) [**Foster & Thrive 1 lb Pouch Epsom Salt Granules - Magnesium Sulfate USP 100% - Saline Laxative - Multi Purpose**Foster & Thrive**$9.36**446 rev1y ago](https://www.amazon.com/dp/B0DD67MKHQ) [**RUNMAG Magnesium Sulfate Food Grade Powder 300g per Bottle**RUNMAG**$10.40**110 rev2y ago](https://www.amazon.com/dp/B0D32JZFT2) [**Amazon Basics Epsom Salt Soak Unscented Magnesium Sulfate USP Muscle and Feet Relaxation Resealable Bag 3 Pound**Amazon Basics**$3.40**17,900 rev2y ago](https://www.amazon.com/dp/B0BXTS6L35) [**Amazon Basics Epsom Salt Soak Fragrance Free Magnesium Sulfate USP for Relaxation and Soothing Foot Soaking 3 Pound Resealable Bags 6-Pack**Amazon Basics**$16.46**17,900 rev2y ago](https://www.amazon.com/dp/B0BXTV9GFF)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Epsoak Epsom Salt 18 lb. Agricultural Grade Magnesium Sulfate. Resealable Bulk Bag for Gardening & Lawn Care Made in The USA**Epsoak**$32.87**4.7★**▲ 238%**](https://www.amazon.com/dp/B07XF87H8D) [**Epsoak Epsom Salt 19 lb. Magnesium Sulfate USP. Resealable Epsom Salt Bag Unscented Made in The USA Cruelty-Free Certified**Epsoak**$33.37**4.8★**▲ 155%**](https://www.amazon.com/dp/B004N7DQHA) [**365 by Whole Foods Market First Aid Epsom Salt Magnesium Sulfate USP 96 Ounce**365 by Whole Foods Market**$6.67**4.8★**▲ 124%**](https://www.amazon.com/dp/B074Y4FF3Z) [**Pure Original Ingredients Magnesium Sulfate (365 Capsules) No Rice Fillers Always Pure Lab Verified**PURE ORIGINAL INGREDIENTS**$39.96**4.5★**▲ 110%**](https://www.amazon.com/dp/B0CS266ZCW) [**Epsoak Epsom Salt 5 lb. Magnesium Sulfate USP. Resealable Epsom Salt Bag Unscented Made in The USA Cruelty-Free Certified**Epsoak**$16.42**4.8★**▲ 84%**](https://www.amazon.com/dp/B004N79BYC)
**~~View all trending →~~**
## **What buyers say about magnesium sulfate**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“Good quality and reliable brand”*
**Value For Money**14%
*“Fair price”*
**Magnesium**13%
*“Best magnesium ever”*
**Sleep Quality**9%
*“Helps me sleep”*
**Advertised Vs Actual Product**6%
*“As described”*
**Efficiency**4%
*“Works ok”*
**Muscle Pain Relief**4%
*“muscle recovery”*
**Vitamin**4%
*“Great source of vitamins”*
**Ease Of Use**3%
*“Easy to use”*
**Ease Of Chewing/Swallowing**2%
*“Easy to swallow”*
### **What buyers complain about **
**Magnesium**11%
*“The magnesium is cheap”*
**Dosage**8%
*“Taking a 1000 mg daily can cause toxicity”*
**Value For Money**7%
*“Not worth the price”*
**Functionality-Overall**6%
*“Non effective”*
**Smell**5%
*“Not Fragrance Free”*
**Side Effects**4%
*“Affects on the body”*
**Acid Regulator/Stomach Ache Relief**4%
*“Horrible stomach pains”*
**Size-Overall**3%
*“Large”*
**Quality-Overall**3%
*“Poor Quality Control”*
**Sleep Quality**2%
*“I can not sleep properly”*
### **Top return reasons **
**Advertised Vs Actual Product**15%
**Leak-Proof**14%
**Value For Money**13%
**Functionality-Overall**12%
**Size-Overall**12%
**Smell**9%
**Salt Content**3%
**Gap/Hole**3%
**Moist/Dry**2%
**Magnesium**2%
## **Common questions**
- **Is magnesium sulfate profitable to sell on Amazon United States?**
- The niche generates $147K/yr across 23 tracked products. 90-day search growth is -17.1%. Flapen's verdict: Skip it (47/100).
- **How competitive is the magnesium sulfate niche?**
- 16 brands and 584 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 70% of demand.
- **What do buyers complain about in magnesium sulfate?**
- Top complaints mined from reviews: Magnesium, Dosage, Value For Money. The return rate is 0.1%.
- **When does demand for magnesium sulfate peak?**
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- **What does it cost to enter the magnesium sulfate niche?**
- Listings span $3.40–$49.78; the average listing price is $19.17 (sweet spot $15–$100). The average incumbent carries 12,380 reviews — the moat a new listing must climb.
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