magnesium sulfate
Skip itSoft demand (-17.1% this quarter) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Avg price
Great$19.17avg listing price — sweet spot $15–$100
Price range
Great$3.40–$49.78cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good4.9%search→purchase rate — share of searches ending in a sale
Brand share
Good70%top-5 brand share — brands hold most of the demand
Competition
Okay56%top-5 click share — leaders hold, buyers still browse
Market size
Okay$147K$147K/yr · 156K searches
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Review moat
Bad12,379.52avg incumbent reviews — the moat a new listing must climb
Growth
Bad-17.1%90-day search growth — must beat 0% to launch
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
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.No pronounced peak months · busiest ÷ quietest = 1.5×
Top magnesium sulfate search terms
- magnesium sulfate86K/yr
- sulfato de magnesio46K/yr
- sulfato de magnesio para tomar10K/yr
- magnesium sulphate5K/yr
- magnesium sulfate powder5K/yr
- sulfato de magnesio en polvo4K/yr
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.
All 23 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Amazon Basics Epsom Salt Soak Unscented Magnesium Sulfate USP Muscle and Feet Relaxation Resealable Bag 3 Pound
Amazon Basics$3.404.8★17,900 rev
RUNMAG Magnesium Sulfate Food Grade Powder 300g per Bottle
RUNMAG$10.404.6★110 rev
Foster & Thrive 1 lb Pouch Epsom Salt Granules - Magnesium Sulfate USP 100% - Saline Laxative - Multi Purpose
Foster & Thrive$9.364.7★446 rev
Pure Original Ingredients Magnesium Sulfate (365 Capsules) No Rice Fillers Always Pure Lab Verified
PURE ORIGINAL INGREDIENTS$39.964.5★41 rev
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$20.934.4★870 rev
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$10.182,613 rev
Foster & Thrive 1 lb Pouch Epsom Salt Granules - Magnesium Sulfate USP 100% - Saline Laxative - Multi Purpose
Foster & Thrive$9.36446 rev
RUNMAG Magnesium Sulfate Food Grade Powder 300g per Bottle
RUNMAG$10.40110 rev
Amazon Basics Epsom Salt Soak Unscented Magnesium Sulfate USP Muscle and Feet Relaxation Resealable Bag 3 Pound
Amazon Basics$3.4017,900 rev
Amazon Basics Epsom Salt Soak Fragrance Free Magnesium Sulfate USP for Relaxation and Soothing Foot Soaking 3 Pound Resealable Bags 6-Pack
Amazon Basics$16.4617,900 rev
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$32.874.7★
Epsoak Epsom Salt 19 lb. Magnesium Sulfate USP. Resealable Epsom Salt Bag Unscented Made in The USA Cruelty-Free Certified
Epsoak$33.374.8★
365 by Whole Foods Market First Aid Epsom Salt Magnesium Sulfate USP 96 Ounce
365 by Whole Foods Market$6.674.8★
Pure Original Ingredients Magnesium Sulfate (365 Capsules) No Rice Fillers Always Pure Lab Verified
PURE ORIGINAL INGREDIENTS$39.964.5★
Epsoak Epsom Salt 5 lb. Magnesium Sulfate USP. Resealable Epsom Salt Bag Unscented Made in The USA Cruelty-Free Certified
Epsoak$16.424.8★
What buyers say about magnesium sulfate
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality and reliable brand”
“Fair price”
“Best magnesium ever”
“Helps me sleep”
“As described”
“Works ok”
“muscle recovery”
“Great source of vitamins”
“Easy to use”
“Easy to swallow”
What buyers complain about
“The magnesium is cheap”
“Taking a 1000 mg daily can cause toxicity”
“Not worth the price”
“Non effective”
“Not Fragrance Free”
“Affects on the body”
“Horrible stomach pains”
“Large”
“Poor Quality Control”
“I can not sleep properly”
Top return reasons
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.