Magnesium Hydroxide
Worth a lookShows low returns (0.0%), but soft demand (-5.3% this quarter) keeps it on the watch list.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Great$19.79avg listing price — sweet spot $15–$100
Price range
Good$5.77–$38.62cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good6.0%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Good71%top-5 brand share — brands hold most of the demand
Competition
Okay64%top-5 click share — leaders hold, buyers still browse
Market size
Okay$104K$104K/yr · 87K searches
Review moat
Bad4,270.06avg incumbent reviews — the moat a new listing must climb
Growth
Bad-5.3%90-day search growth — must beat 0% to launch
Is magnesium hydroxide profitable on Amazon?
According to Flapen's Amazon United States niche tracking, magnesium hydroxide is a $104K/yr Amazon United States market (87K searches/yr). The top 5 brands hold 71% of demand. Verdict: Worth a look — 50/100.
Data updated Jul 11, 2026 · scored weekly · How we score niches
magnesium hydroxide market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 4K–5K
- avg 100–250/product
- Revenue / yr
- $79K–$99K
- units × avg price
- Conversion rate
- 6.0%
- Avg BSR
- #783
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 89%
- Out of stock
- 0.4%
- Avg brand age
- 79 months
- Avg seller age
- 147 days
Competition: brands, sellers & click share
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.Brands
14 falling
Sellers
64
Top-5 brand share
71%
Top 20: 100%
Top-5 click share
64%
Top 20: 100%
Open market
23%
- BulkSupplements25%
- mGanna15%
- Herbs Botanica14%
- Best Naturals9%
- Dulcolax8%
- Phillips'5%
magnesium hydroxide demand & seasonality
Weekly Amazon search volume, last 48 weeks — -5.3% search growth over the last 90 days.Top magnesium hydroxide search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- magnesium hydroxide75K/yr
- hidrxido de magnesio9K/yr
- magnesium hydroxide laxative4K/yr
Top magnesium hydroxide 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.
All 18 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
BulkSupplements.com Magnesium Hydroxide Powder - Magnesium Hydroxide Supplement - Food Grade & Gluten Free 1g per Serving 500g (1.1 lbs) (Pack of 1)
BulkSupplements$18.964.7★1,506 rev
mGanna Magnesium Hydroxide Powder 227 GMS / 0.5 lbs
mGanna$11.444.6★82 rev
Herbs Botanica Magnesium Hydroxide Powder 8 oz Fine Powdered Magnesium for DIY Use Deodorant Toothpaste and Crafting Ozonated Magnesium Oxide Alternative
Herbs Botanica$11.694.5★94 rev
Best Naturals Magnesium Hydroxide Powder - 380mg of Elemental Magnesium per Serving - 454 Servings per Cotainer - 1 Pound
Best Naturals$14.634.6★284 rev
Phillips Milk of Magnesia Liquid Laxative Wild Cherry Flavor Stimulant Free Cramp Free Relief of Occasional Constipation* Effective in 30 minutes - 6 hours #1 Milk of Magnesia Brand 26 oz
Phillips'$8.784.7★12,448 rev
Newest
by launch date
Colace Saline Laxative 60 Capsules Fast Acting Gentle Constipation Relief for Adults Gentle Magnesium Hydroxide Formula Non-Stimulant Laxative Severe Constipation Relief
Colace$21.4559 rev
Magnesium Hydroxide Capsules Gentle Osmotic Digestive Regularity Support Helps Maintain Comfortable Bowel Routine Daily GI Balance for Adults - 120 Capsules
Florvyn$25.611 rev
Herbs Botanica Magnesium Hydroxide Powder 8 oz Fine Powdered Magnesium for DIY Use Deodorant Toothpaste and Crafting Ozonated Magnesium Oxide Alternative
Herbs Botanica$11.6994 rev
Magnesium Hydroxide Capsules Contains 270 mg of Magnesium Relieve Constipation and Indigestion Support Intestinal Motility Gut Health for Women and Men (120 Capsules)
provspro$30.5318 rev
Quicksilver Scientific Magnesium Hydroxide (120 Capsules)
Quicksilver Scientific$38.6211 rev
Trending
90-day click momentumColace Saline Laxative 60 Capsules Fast Acting Gentle Constipation Relief for Adults Gentle Magnesium Hydroxide Formula Non-Stimulant Laxative Severe Constipation Relief
Colace$21.454.4★
Herbs Botanica Magnesium Hydroxide Powder 8 oz Fine Powdered Magnesium for DIY Use Deodorant Toothpaste and Crafting Ozonated Magnesium Oxide Alternative
Herbs Botanica$11.694.5★
mGanna Magnesium Hydroxide Powder 227 GMS / 0.5 lbs
mGanna$11.444.6★
BulkSupplements.com Magnesium Hydroxide Powder - Magnesium Hydroxide Supplement - Food Grade & Gluten Free 1g per Serving 100g (3.5 oz) (Pack of 1)
BulkSupplements$13.364.7★
Magnesium Hydroxide Capsules Gentle Osmotic Digestive Regularity Support Helps Maintain Comfortable Bowel Routine Daily GI Balance for Adults - 120 Capsules
Florvyn$25.612.0★
What reviews say buyers love and hate about magnesium hydroxide
What buyers praise and complain about, mined from review topics.What buyers love
“Great taste”
“Works perfectly”
“As advertised”
“Easy to use”
“Very effective product”
“Great, smooth digestion”
“Great chews”
“it works quickly to help the stomach with any malaise”
“Great deal”
“Nice flavors and easy to chew”
What buyers complain about
“Never worked”
“Not tasty”
“A little pricey”
“It seems expensive for the dosage”
“For several years constipation has been getting progressively worse, to the point where it can be 5 days and nothing, which then required 3-4 stimulant laxative pills and a lot of effort to get things moving”
“Weird texture”
“I did not have great ease in swallowing it”
“Smell is weird”
“Not quite as described”
“I got a stomach ache”
Top return reasons
Common magnesium hydroxide questions
- Is magnesium hydroxide profitable to sell on Amazon United States?
- The niche generates $104K/yr across 18 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -5.3%. Flapen's verdict: Worth a look (50/100).
- How competitive is the magnesium hydroxide niche?
- 14 brands and 64 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 71% of demand.
- What do buyers complain about in magnesium hydroxide?
- Top complaints mined from reviews: Functionality-Overall, Taste-Overall, Value For Money. The return rate is 0.0%.
- What does it cost to enter the magnesium hydroxide niche?
- Listings span $5.77–$38.62; the average listing price is $19.79 (sweet spot $15–$100). The average incumbent carries 4,270 reviews — the moat a new listing must climb.