Magnesium 300mg
FailThe average product has 20,452 reviews to catch up to, so Magnesium 300mg is a Fail.
- Flapen Score
- 44 / 100Ranks 10,233 of 14,768 Health & Household niches · −5 vs the category median of 4944
- Market size
- $66K/yr34K searches / yr
- 90-day growth
- -13.1%search demand this quarter
- Competition
- 62%top-5 click share · 12 brands · 621 sellers
Flapen Score
Magnesium 300mg against its category
The dotted line is the Health & Household average. Past it, Magnesium 300mg is stronger. Inside it, weaker.
Market
The Magnesium 300mg market on Amazon at a glance
Shoppers on Amazon United States searched for Magnesium 300mg 34K times last year and spent an estimated $66K. The top 5 brands take 85% of clicks. Demand peaks in Jan–Feb–Mar. Flapen scores it 44 out of 100, a Fail.
01 · Demand
An estimated 9.9% of those searches ended in a purchase.
Shoppers searched for this 34K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 9.9% of those searches ended in a purchase. Searches in the last 90 days moved -13.1% against the 90 days before. Searches, conversion and average price together put the market at an estimated $66K a year.
- Searches, last 12 months
- 34K
- Growth, 90 days vs prior 90
- -13.1%
- Conversion, latest week
- 9.9%
- Market size, estimated
- $66Ka year
- Peak month
- February4.2× the quietest month
- Top search term
- magnesium 300mg19K searches a year
02 · Price
A sale here is worth $19.52.
Listings sell for $19.52 on average, from $4.10 to $45.01. Amazon reports units sold in ranges. This niche sold 3K to 4K a year. The average listing sells 100 to 250 of them. At $19.52 that is $2K to $5K a year per listing.
- Average price
- $19.52inside the $15 to $100 sweet spot
- Price range
- $4.10–$45.01
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 3K–4K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $2K–$5K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
83% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #220 within Magnesium. It carries 20,452 reviews at 4.67 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 83%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #220in Magnesium
- Average rating
- 4.67 starsAmazon United States average 4.42 stars
- Average reviews
- 20,452per listing
- Listings tracked
- 18
04 · Newcomers
0 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 73 months on average, so the names here are established.
- Launched, last 12 months
- 1
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 73 months
Products
Top Magnesium 300mg products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 28, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Nature Made Magnesium Glycinate 300 mg per 3 Capsules 90 Capsules
- Price
- $21.13
- Rating
- 4.7/5
- Reviews
- 2,683
- Age
- 1y ago

tnvitamins Magnesium Glycinate 300mg 90 Capsules | High Absorption Chelated Magnesium for Sleep Calm & Muscle Support* | Non-GMO Gentle Non-Laxative | TNVitamins
- Price
- $9.82
- Rating
- 4.7/5
- Reviews
- 3,749
- Age
- 4y ago

Nature Made Magnesium 250 mg Softgels 90 Softgels
- Price
- $6.57
- Rating
- 4.7/5
- Reviews
- 34,776
- Age
- 14y ago

MegaFood Magnesium Glycinate Malate Citrate 300mg 60 Capsules
- Price
- $15.71
- Rating
- 4.6/5
- Reviews
- 4,256
- Age
- 6y ago

Pure Encapsulations Magnesium (Glycinate) - Supplement to Support Stress Relief Sleep Heart Health Nerves Muscles and Metabolism* - with Magnesium Glycinate - 90 Capsules
- Price
- $26.10
- Rating
- 4.7/5
- Reviews
- 49,969
- Age
- 18y ago
Trending
estimated 90-day click momentum
Built By Nature Magnesium Citrate 300mg Supplement 90 Capsules
- Price
- $10.52
- Rating
- 4.6/5
- Reviews
- 48
- Age
- 10mo ago

Qunol Magnesium Glycinate Tablets 300mg 100% Chelated Gluten-Free 150ct
- Price
- $28.24
- Rating
- 4.6/5
- Reviews
- 6,509
- Age
- 1y ago

Nature Made Magnesium Oxide 250 mg for Muscle Relaxation 200 Tablets
- Price
- $6.80
- Rating
- 4.7/5
- Reviews
- 34,776
- Age
- 27y ago

Natures Bounty Magnesium 500 mg Tablets High Potency Magnesium Supplement for Bone & Muscle Health Whole Body Support 200 Count (Pack of 1)
- Price
- $8.74
- Rating
- 4.7/5
- Reviews
- 105,290
- Age
- 12y ago

Nature Made Magnesium Glycinate 300 mg per 3 Capsules 90 Capsules
- Price
- $21.13
- Rating
- 4.7/5
- Reviews
- 2,683
- Age
- 1y ago
Newest
by launch date
Built By Nature Magnesium Citrate 300mg Supplement 90 Capsules
- Price
- $10.52
- Rating
- 4.6/5
- Reviews
- 48
- Age
- 10mo ago

THORNE - Magnesium Glycinate - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - Chelated Magnesium Capsules - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Servings
- Price
- $25.39
- Rating
- 4.7/5
- Reviews
- 2,847
- Age
- 1y ago

Qunol Magnesium Glycinate Tablets 300mg 100% Chelated Gluten-Free 150ct
- Price
- $28.24
- Rating
- 4.6/5
- Reviews
- 6,509
- Age
- 1y ago

Nature Made Magnesium Glycinate 300 mg per 3 Capsules 90 Capsules
- Price
- $21.13
- Rating
- 4.7/5
- Reviews
- 2,683
- Age
- 1y ago

Nutricost Triple Magnesium Complex 300mg 120 Capsules 60 Servings
- Price
- $19.49
- Rating
- 4.8/5
- Reviews
- 314
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 62% of clicks. Leaders hold, but buyers still shop past them.
Brands
12 rising
Sellers
621
Est. top-5 brand share
85%
Top 20: 100%
Est. top-5 click share
62%
Top 20: 100%
Open market
10%
- Nature Made45%
- tnvitamins13%
- MegaFood11%
- Qunol8%
- Pure Encapsulations8%
- BioEmblem5%
- Open — no brand owns it (6 brands, 10%)
Demand
Magnesium 300mg search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan, Feb, Mar · busiest ÷ quietest = 4.2×
Search terms
Top Magnesium 300mg search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- magnesium 300mg19K/yr
- magnesium 300 mg5K/yr
- magnesium 300mg for women4K/yr
- magnesium 3004K/yr
- 300 mg magnesium3K/yr
Reviews and returns
What reviews say buyers love and hate about Magnesium 300mg
We read the reviews and the return reasons for every product selling here.
“I was having trouble sleeping”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
15 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Magnesium 300mg questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









