Is magnesium 500mg profitable to sell on Amazon United States?

The niche generates $193K/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +11.1%. Flapen's verdict: Skip it (38/100).

How competitive is the magnesium 500mg niche?

6 brands and 37 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 97% of demand.

What do buyers complain about in magnesium 500mg?

Top complaints mined from reviews: Magnesium, Dosage, Sleep Quality. The return rate is 0.0%.

When does demand for magnesium 500mg peak?

Demand peaks in Jan–Feb–Mar–Sep–Oct–Nov–Dec; the busiest month runs 55.1× the quietest.

What does it cost to enter the magnesium 500mg niche?

Listings span $5.55–$17.66; the average listing price is $10.99 (sweet spot $15–$100). The average incumbent carries 32,418 reviews — the moat a new listing must climb.

Magnesium 500mg

Skip it

Brand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Great11.3%

search→purchase rate — share of searches ending in a sale

Avg price

Okay$10.99

avg listing price — sweet spot $15–$100

Growth

Okay+11.1%

90-day search growth — must beat 0% to launch

Market size

Okay$193K

$193K/yr · 155K searches

Price range

Bad$5.55–$17.66

cheapest to priciest tracked listing — scored on the share inside $15–$100

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Review moat

Bad32,418.38

avg incumbent reviews — the moat a new listing must climb

Competition

Bad90%

top-5 click share — a locked-up shelf

Brand share

Bad97%

top-5 brand share — brand-locked demand

Is magnesium 500mg profitable on Amazon?

According to Flapen's Amazon United States niche tracking, magnesium 500mg is a $193K/yr Amazon United States market (155K searches/yr). The top 5 brands hold 97% of demand. Demand peaks in Jan–Feb–Mar–Sep–Oct–Nov–Dec. Verdict: Skip it — 38/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

magnesium 500mg market size & sales

Units sold, revenue, conversion and listing quality across the tracked shelf.

Units sold / yr: 25K–30K; avg 3,000–4,000/product
Revenue / yr: $275K–$330K; units × avg price
Conversion rate: 11.3%
Avg BSR: #171
Page quality: 0%
Prime: 100%
Sponsored: 88%
Out of stock: 0.0%
Avg brand age: 65 months
Avg seller age: 141 days

Competition: brands, sellers & click share

The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.

Brands

6 rising

Sellers

Top-5 brand share

97%

Top 20: 100%

Top-5 click share

90%

Top 20: 100%

Open market

Nature's Bounty80%
Horbäach5%
Life Extension4%
Bronson4%
NatureBell3%
Nobi Nutrition3%

magnesium 500mg demand & seasonality

Weekly Amazon search volume, last 104 weeks — +11.1% search growth over the last 90 days.

Peak months: Jan, Feb, Mar, Sep, Oct, Nov, Dec · busiest ÷ quietest = 55.1×

Open Trend

Top magnesium 500mg search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

magnesium 500mg61K/yr -0.6%15.3% conv.
magnesium 500 mg24K/yr +3.9%12.0% conv.
magnesium 50021K/yr +25.0%9.7% conv.
500 mg magnesium12K/yr +33.2%8.4% conv.
magnesium 500 mg tablets12K/yr +19.6%9.4% conv.
magnesium 500mg capsules9K/yr +33.1%7.3% conv.
magnesium supplement 500 mg5K/yr +101.1%0.9% conv.
magnesio 500mg5K/yr -5.2%7.0% conv.
500mg magnesium3K/yr +3.8%14.9% conv.
magnesium tablets 500mg2K/yr -12.3%13.4% conv.

All search terms

Top magnesium 500mg 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Natures Bounty Magnesium 500 mg Tablets High Potency Magnesium Supplement for Bone & Muscle Health Whole Body Support 200 Count (Pack of 1)

Nature's Bounty$8.744.7★105,290 rev

Natures Bounty Magnesium Supplements 500mg Tablets Support Bone & Muscle Health 200 Count (Pack of 2)

Nature's Bounty$16.234.7★105,290 rev

Natures Bounty Magnesium Mineral Supplement Supports Bone and Muscle Health 500 mg Coated Tablets 100 Count

Nature's Bounty$5.554.7★1,640 rev

Horbach Magnesium 500mg | 180 Caplets

Horbäach$6.194.6★2,722 rev

Life Extension Magnesium Caps 500 mg Magnesium Oxide Citrate and Succinate Heart Health Healthy Bones Metabolism Support 100 Vegetarian Capsules

Life Extension$8.384.7★16,772 rev

Newest

by launch date

Natures Bounty Magnesium Supplements 500mg Tablets Support Bone & Muscle Health 200 Count (Pack of 2)

Nature's Bounty$16.23105,290 rev

8mo ago

Nobi Nutrition$15.156,787 rev

2y ago

Bronson Magnesium 500 MG Supports Bone & Muscle Health & Nervous System Support - Non-GMO 120 Vegetarian Tablets

Bronson$9.991,168 rev

2y ago

Naturebell Pure Magnesium Glycinate 500mg 240 Veggie Capsules | 100% Chelated & Purified 3rd Party Tested Vegan Friendly Non-GMO Filler Free

NatureBell$17.6619,678 rev

3y ago

Horbach Magnesium 500mg | 180 Caplets

Horbäach$6.192,722 rev

3y ago

What reviews say buyers love and hate about magnesium 500mg

What buyers praise and complain about, mined from review topics.

What buyers love

Sleep Quality16%

“Helps with sleep”

Quality-Overall16%

“Good quality and reliable brand”

Value For Money13%

“Best Price”

Magnesium12%

“Best magnesium ever”

Vitamin5%

“Good vitamin”

Advertised Vs Actual Product5%

“AS advertised”

Muscle Pain Relief4%

“Relaxes my muscles”

Ease Of Chewing/Swallowing3%

“Ez to swallow”

Efficiency2%

“Do the work”

Dosage2%

“Easy to take capsules”

What buyers complain about

Magnesium15%

“This is not magnesium glycinate”

Dosage13%

“Misleading 500mg label/dosage”

Sleep Quality7%

“Didnt help me sleep”

Advertised Vs Actual Product6%

“Extremely misleading description”

Functionality-Overall5%

“Didn't work for me”

Side Effects5%

“Side effects”

Acid Regulator/Stomach Ache Relief3%

“Hard on my stomach”

Size-Overall3%

“Large”

Allergies3%

“Allergic reaction”

Ease Of Chewing/Swallowing2%

“Hard to swallow”

Top return reasons

Magnesium40%

Dosage16%

Value For Money9%