Is magtein profitable to sell on Amazon United States?

The niche generates $1.8M/yr across 16 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -6.4%. Flapen's verdict: Worth a look (57/100).

How competitive is the magtein niche?

13 brands and 56 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 81% of demand.

What do buyers complain about in magtein?

Top complaints mined from reviews: Sleep Quality, Value For Money, Side Effects. The return rate is 0.0%.

When does demand for magtein peak?

Demand is steady year-round — the busiest month runs 1.8× the quietest.

What does it cost to enter the magtein niche?

Listings span $26.18–$54.49; the average listing price is $36.97 (sweet spot $15–$100). The average incumbent carries 5,322 reviews — the moat a new listing must climb.

Magtein

Worth a look

Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$36.97

avg listing price — sweet spot $15–$100

Price range

Incredible$26.18–$54.49

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

Market size

Great$1.8M

$1.8M/yr · 437K searches

Conversion

Great10.9%

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

Brand share

Okay81%

top-5 brand share — brands hold most of the demand

Competition

Okay69%

top-5 click share — leaders hold, buyers still browse

Review moat

Bad5,321.56

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-6.4%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Is magtein profitable on Amazon?

According to Flapen's Amazon United States niche tracking, magtein is a $1.8M/yr Amazon United States market (437K searches/yr). The top 5 brands hold 81% of demand. Verdict: Worth a look — 57/100.

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

magtein market size & sales

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

Units sold / yr: 50K–60K; avg 3,000–4,000/product
Revenue / yr: $1.8M–$2.2M; units × avg price
Conversion rate: 10.9%
Avg BSR: #298
Page quality: 0%
Prime: 100%
Sponsored: 88%
Out of stock: 0.0%
Avg brand age: 53 months
Avg seller age: 157 days

Competition: brands, sellers & click share

The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 rising

Sellers

Top-5 brand share

81%

Top 20: 100%

Top-5 click share

69%

Top 20: 100%

Open market

15%

NOW Foods27%
Double Wood Supplements20%
Sports Research15%
Magtein13%
Life Extension7%
Teraputics4%
Open — no brand owns it (7 brands, 15%)

magtein demand & seasonality

Weekly Amazon search volume, last 101 weeks — -6.4% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.8×

Open Trend

Top magtein search terms shoppers use

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

magtein207K/yr -10.1%9.4% conv.
magtein magnesium l-threonate118K/yr -6.3%11.2% conv.
magtein magnesium l-threonate 2000mg22K/yr +36.9%12.6% conv.
magnesium l-threonate magtein10K/yr +29.3%4.1% conv.
magtein now11K/yr -27.6%18.7% conv.
now magtein10K/yr -1.3%14.9% conv.
magtein magnesium l threonate7K/yr +28.3%3.2% conv.
now magnesium l-threonate8K/yr -7.2%9.0% conv.
magtein l-threonate6K/yr -15.5%9.9% conv.
now magtein magnesium l-threonate5K/yr +4.7%15.8% conv.

All search terms

Top magtein 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 16 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Magnesium L Threonate Magtein - NSF Certified - Sleep and Cognitive Support High Absorption Most Bioavailable Form of Magnesium 2 000 mg 120 Capsules

Double Wood Supplements$29.004.6★19,388 rev

NOW Foods Supplements Magtein with patented form of Magnesium (Mg) Cognitive Support* 90 Veg Capsules

NOW Foods$29.344.6★7,361 rev

Magtein - Magnesium L-Threonate Supplement Memory Focus Sleep & Brain Health Formula for Men & Women Cognitive Support for Adults Clinically Researched - 60 Veg Capsules

Magtein$31.914.6★2,087 rev

Sports Research Magnesium L-Threonate 2000mg w/Magtein 90 Count

Sports Research$28.354.8★2,673 rev

Now Foods Supplements Magtein Magnesium L-Threonate Cognitive Support* 180 Veg Capsules

NOW Foods$53.694.6★7,361 rev

Newest

by launch date

NOW Foods Supplements Magtein Magnesium L-Threonate Cognitive Support* 120 Veg Capsules

NOW Foods$40.6467 rev

9mo ago

Sports Research Magnesium L-Threonate 2000mg w/Magtein 180 Count

Sports Research$54.492,673 rev

2y ago

Now Foods Supplements Magtein Magnesium L-Threonate Cognitive Support* 180 Veg Capsules

NOW Foods$53.697,361 rev

2y ago

Magceutics Magtein Magnesium L-Threonate to Improve Cognition Focus Memory Sleep Quality and Brain Health with Small Caps - 120 Vegetable Capsules

Magceutics$31.98310 rev

4y ago

Momentous Magtein Magnesium L-Threonate - Brain & Rest Support Supplement - Boosts Cognitive Function & Sleep Quality - NSF Certified for Sport -145 mg - 30 Servings

Momentous$48.33738 rev

4y ago

What reviews say buyers love and hate about magtein

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

What buyers love

Sleep Quality24%

“Help with sleep”

Quality-Overall17%

“the quality is consistent”

Magnesium12%

“Great magnesium choice”

Value For Money5%

“Great value”

Vitamin5%

“They also have supported vitamin”

Efficiency4%

“Works well”

Advertised Vs Actual Product4%

“Accurate description”

Focus Enhancement3%

“I really consider it helps my focus”

Joint Pain2%

“And it does relieve the leg cramps”

Stress/Anxiety1%

“also helps with anxiety”

What buyers complain about

Sleep Quality12%

“I have not slept well for years”

Value For Money8%

“It's expensive”

Side Effects7%

“Horrible side effect”

Magnesium7%

“all magnesium threonate is expensive”

Dosage7%

“Unclear dosage instructions”

Functionality-Overall5%

“No results”

Quality-Overall5%

“Poor Quality Control”

Certifications3%

“Not NSF Certified”

Acid Regulator/Stomach Ache Relief3%

“This product also makes me nauseous after taking it”

Size-Overall2%

“The capsules are very large”

Top return reasons

Functionality-Overall21%

Magnesium16%

Sleep Quality11%

Value For Money11%

Fever Relief5%

Dosage5%

Advertised Vs Actual Product5%

Ingredients-Overall5%

Product Condition5%

Heart Health5%

Common magtein questions

Is magtein profitable to sell on Amazon United States?: The niche generates $1.8M/yr across 16 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -6.4%. Flapen's verdict: Worth a look (57/100).
How competitive is the magtein niche?: 13 brands and 56 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 81% of demand.
What do buyers complain about in magtein?: Top complaints mined from reviews: Sleep Quality, Value For Money, Side Effects. The return rate is 0.0%.
When does demand for magtein peak?: Demand is steady year-round — the busiest month runs 1.8× the quietest.
What does it cost to enter the magtein niche?: Listings span $26.18–$54.49; the average listing price is $36.97 (sweet spot $15–$100). The average incumbent carries 5,322 reviews — the moat a new listing must climb.