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

The niche generates $323K/yr across 6 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +5.1%. Flapen's verdict: Skip it (37/100).

How competitive is the sundown magnesium 500mg niche?

3 brands and 43 sellers compete. The top 5 products take 96% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in sundown magnesium 500mg?

Top complaints mined from reviews: Magnesium, Size-Overall, Quality-Overall. The return rate is 0.0%.

When does demand for sundown magnesium 500mg peak?

Demand peaks in Jul; the busiest month runs 1.8× the quietest.

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

Listings span $5.55–$16.23; the average listing price is $10.12 (sweet spot $15–$100). The average incumbent carries 39,565 reviews — the moat a new listing must climb.

sundown magnesium 500mg

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible12.5%

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

Market size

Good$323K

$323K/yr · 256K searches

Avg price

Okay$10.12

avg listing price — sweet spot $15–$100

Growth

Okay+5.1%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Price range

Bad$5.55–$16.23

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

Review moat

Bad39,564.83

avg incumbent reviews — the moat a new listing must climb

Competition

Bad96%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, sundown magnesium 500mg is a $323K/yr Amazon United States market (256K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jul. Verdict: Skip it — 37/100.

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

sundown magnesium 500mg market data

Units sold / yr: 40K–50K; avg 6,000–8,000/product
Revenue / yr: $405K–$506K; units × avg price
Conversion rate: 12.5%
Avg BSR: #147
Page quality: 0%
Prime: 100%
Sponsored: 83%
Out of stock: 0.0%
Avg brand age: 65 months
Avg seller age: 144 days

Competition & brand share

The top 5 products capture 96% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 flat

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

96%

Top 20: 100%

Open market

Nature's Bounty93%
Life Extension4%
Horbäach4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +5.1% search growth over the last 90 days.

Peak months: Jul · busiest ÷ quietest = 1.8×

Open Trend

Top sundown magnesium 500mg search terms

magnesium 500mg61K/yr -0.6%14.5% conv.
natures bounty magnesium36K/yr -3.0%12.0% conv.
magnesium 500 mg24K/yr +3.9%11.0% conv.
magnesium 50021K/yr +25.0%9.3% conv.
magnesium natures bounty17K/yr -11.3%15.0% conv.
500 mg magnesium12K/yr +33.2%7.7% conv.
magnesium 500 mg tablets12K/yr +19.6%8.6% conv.
magnesium 500mg capsules9K/yr +33.1%6.6% conv.
magnesium capsules 500mg9K/yr +31.4%4.5% conv.
natures bounty magnesium 500mg9K/yr -6.4%26.6% conv.

All search terms

Top sundown magnesium 500mg 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.

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

All 6 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

Natures Bounty High Absorption Magnesium Glycinate 240 mg for Supporting Muscle Relaxation and Bone Heart & Nerve Health Non-GMO Gluten-Free Vegetarian 120 Count/60 Servings

Nature's Bounty$15.654.7★5,675 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

Natures Bounty High Absorption Magnesium Glycinate 240 mg for Supporting Muscle Relaxation and Bone Heart & Nerve Health Non-GMO Gluten-Free Vegetarian 120 Count/60 Servings

Nature's Bounty$15.655,675 rev

1y ago

Horbach Magnesium 500mg | 180 Caplets

Horbäach$6.192,722 rev

3y ago

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$8.74105,290 rev

12y ago

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

Life Extension$8.3816,772 rev

22y ago

What buyers say about sundown magnesium 500mg

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

What buyers love

Quality-Overall17%

“Good quality and reliable brand”

Sleep Quality15%

“Helps me sleep”

Value For Money12%

“Good value for the money”

Magnesium11%

“Good Magnesium Supplement”

Vitamin5%

“The best vitamin for your body”

Advertised Vs Actual Product5%

“AS advertised”

Muscle Pain Relief5%

“sore muscles has been nice”

Efficiency3%

“Doing the job working well”

Joint Pain2%

“Good for achy joints”

Ease Of Chewing/Swallowing2%

“not hard to swallow”

What buyers complain about

Magnesium10%

“I tend to get low on magnesium”

Size-Overall8%

“The tablets are unusually huge”

Quality-Overall6%

“Poor quality control”

Sleep Quality6%

“I had trouble sleeping”

Ease Of Chewing/Swallowing5%

“Hard to swallow”

Dosage4%

“Messed me up bad after just one dose”

Value For Money4%

“to expensive to buy again”

Smell3%

“Bad Chemical Smell and Taste”

Functionality-Overall3%

“Does not work”

Pain Relief-Overall3%

“arm pain at night when sleeping”

Top return reasons

Magnesium39%

Value For Money11%

Advertised Vs Actual Product7%

Dosage7%

Charging4%

Vitamin4%

Functionality-Overall4%

Product Condition4%

Durability4%

Size-Overall4%

Common questions

Is sundown magnesium 500mg profitable to sell on Amazon United States?: The niche generates $323K/yr across 6 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +5.1%. Flapen's verdict: Skip it (37/100).
How competitive is the sundown magnesium 500mg niche?: 3 brands and 43 sellers compete. The top 5 products take 96% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in sundown magnesium 500mg?: Top complaints mined from reviews: Magnesium, Size-Overall, Quality-Overall. The return rate is 0.0%.
When does demand for sundown magnesium 500mg peak?: Demand peaks in Jul; the busiest month runs 1.8× the quietest.
What does it cost to enter the sundown magnesium 500mg niche?: Listings span $5.55–$16.23; the average listing price is $10.12 (sweet spot $15–$100). The average incumbent carries 39,565 reviews — the moat a new listing must climb.