Is magnesium l-threonate profitable to sell on Amazon United States?

The niche generates $15.2M/yr across 22 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -6.0%. Flapen's verdict: Worth a look (60/100).

How competitive is the magnesium l-threonate niche?

18 brands and 63 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 75% of demand.

What do buyers complain about in magnesium l-threonate?

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

When does demand for magnesium l-threonate peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the magnesium l-threonate niche?

Listings span $14.11–$84.91; the average listing price is $36.32 (sweet spot $15–$100). The average incumbent carries 4,963 reviews — the moat a new listing must climb.

Magnesium L-threonate

Worth a look

Shows a $15.2M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size

Incredible$15.2M

$15.2M/yr · 4.5M searches

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$36.32

avg listing price — sweet spot $15–$100

Price range

Great$14.11–$84.91

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

Conversion

Great9.3%

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

Brand share

Good75%

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

Competition

Okay65%

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

Review moat

Bad4,962.64

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-6.0%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Is magnesium l-threonate profitable on Amazon?

According to Flapen's Amazon United States niche tracking, magnesium l-threonate is a $15.2M/yr Amazon United States market (4.5M searches/yr). The top 5 brands hold 75% of demand. Verdict: Worth a look — 60/100.

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

magnesium l-threonate market size & sales

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

Units sold / yr: 400K–500K; avg 20,000–25,000/product
Revenue / yr: $14.5M–$18.2M; units × avg price
Conversion rate: 9.3%
Avg BSR: #240
Page quality: 0%
Prime: 100%
Sponsored: 91%
Out of stock: 4.2%
Avg brand age: 47 months
Avg seller age: 151 days

Competition: brands, sellers & click share

The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.

Brands

18 rising

Sellers

Top-5 brand share

75%

Top 20: 100%

Top-5 click share

65%

Top 20: 98%

Open market

22%

Double Wood Supplements23%
Life Extension22%
Sports Research14%
KAPPA NUTRITION9%
NOW Foods7%
Nature Made4%

magnesium l-threonate demand & seasonality

Weekly Amazon search volume, last 104 weeks — -6.0% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top magnesium l-threonate search terms shoppers use

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

magnesium l-threonate2.1M/yr -6.2%8.4% conv.
magnesium threonate1.0M/yr -18.8%6.9% conv.
magnesium l threonate264K/yr +41.2%5.1% conv.
magtein207K/yr -10.1%8.9% conv.
magnesium threonate supplement138K/yr +1.3%6.4% conv.
treonato de magnesio136K/yr -22.1%2.0% conv.
magtein magnesium l-threonate118K/yr -6.3%10.7% conv.
l threonate magnesium56K/yr +1.1%4.9% conv.
magnesium threonate and glycinate37K/yr +51.2%2.4% conv.
magnesio treonato55K/yr -12.3%1.7% conv.

All search terms

Top magnesium l-threonate 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 22 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

Life Extension Neuro-Mag Magnesium L-Threonate Memory Health Quick Thinking Cognitive Health Support Vegetarian Non-GMO 90 Vegetarian Capsules (144 mg from 2000 mg Magtein magnesium L-threonate

Life Extension$29.014.6★24,338 rev

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

Sports Research$28.354.8★2,673 rev

Kappa Nutrition Powered by Magbrain Magnesium L-Threonate Plant-Based 420mg Elemental Magnesium (3 Capsules) from 2 253mg 120 Vegan Capsules Brain Sleep & Muscle Support.

KAPPA NUTRITION$26.184.7★6,509 rev

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

NOW Foods$29.344.6★7,361 rev

Newest

by launch date

Qunol Q-Mag Magnesium L-Threonate Tablets 2000mg of Magtein to Help Support Cognitive Performance Improve Mental Alertness & Productivity Supports Restful Sleep High Absorption 60 Count

Qunol$31.47259 rev

9mo ago

Vocks Magnesium L-Threonate 2000 mg | Brain Magnesium for Memory Focus Sleep Anxiety and Cognitive Support | Vegan Non-GMO Gluten-Free | Third-Party Tested for Purity | 90 Count

Vocks$15.69260 rev

1y ago

Magnesium L-Threonate Plant-Based 3 in 1 Powered by Magbrain Magnesium L-Threonate Plant-Based | Magnesium Bisglycinate & Magnesium Malate | Up to 420 mg Elemental Magnesium | 60 Vegan Capsules.

KAPPA NUTRITION$14.116,509 rev

1y 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

What reviews say buyers love and hate about magnesium l-threonate

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

What buyers love

Sleep Quality24%

“HELP WITH SLEEP”

Quality-Overall17%

“The quality seems solid”

Magnesium13%

“Best magnesium I have ever taken”

Value For Money6%

“Great value”

Vitamin6%

“They also have supported vitamin”

Efficiency4%

“Works well”

Advertised Vs Actual Product4%

“Accurate description”

Focus Enhancement4%

“I really consider it helps my focus”

Soothing Effect1%

“it does help me relax”

Joint Pain1%

“And it does relieve the leg cramps”

What buyers complain about

Sleep Quality14%

“Didnt help with sleep”

Magnesium8%

“there might be a magnesium deficiency present”

Dosage7%

“Unclear dosage instructions”

Value For Money7%

“Too expensive”

Side Effects7%

“Horrible side effect”

Functionality-Overall6%

“Not Effective”

Quality-Overall4%

“Poor Quality Control”

Size-Overall3%

“The capsules are very large”

Certifications3%

“Not NSF Certified”

Advertised Vs Actual Product2%

“False advertising”

Top return reasons

Functionality-Overall21%

Magnesium17%

Value For Money13%

Sleep Quality13%

Dosage4%

Heart Health4%

Ingredients-Overall4%

Fever Relief4%

Product Condition4%

Vegan/Organic4%

Common magnesium l-threonate questions

Is magnesium l-threonate profitable to sell on Amazon United States?: The niche generates $15.2M/yr across 22 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -6.0%. Flapen's verdict: Worth a look (60/100).
How competitive is the magnesium l-threonate niche?: 18 brands and 63 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 75% of demand.
What do buyers complain about in magnesium l-threonate?: Top complaints mined from reviews: Sleep Quality, Magnesium, Dosage. The return rate is 0.0%.
When does demand for magnesium l-threonate peak?: Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the magnesium l-threonate niche?: Listings span $14.11–$84.91; the average listing price is $36.32 (sweet spot $15–$100). The average incumbent carries 4,963 reviews — the moat a new listing must climb.