Is thorne magnesium citrate profitable to sell on Amazon United States?

The niche generates $6.2M/yr across 4 tracked products. 90-day search growth is +11.4%. Flapen's verdict: Worth a look (53/100).

How competitive is the thorne magnesium citrate niche?

2 brands and 9 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in thorne magnesium citrate?

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

When does demand for thorne magnesium citrate peak?

Demand peaks in May–Jun–Jul; the busiest month runs 3.6× the quietest.

What does it cost to enter the thorne magnesium citrate niche?

Listings span $21.39–$50.86; the average listing price is $30.93 (sweet spot $15–$100). The average incumbent carries 15,236 reviews — the moat a new listing must climb.

thorne magnesium citrate

Worth a look

Shows low returns (0.0%), but a concentrated shelf (top 5 take 100% of clicks) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Market size

Incredible$6.2M

$6.2M/yr · 1.2M searches

Conversion

Incredible16.4%

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

Avg price

Incredible$30.93

avg listing price — sweet spot $15–$100

Price range

Incredible$21.39–$50.86

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

Growth

Okay+11.4%

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

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad15,236.25

avg incumbent reviews — the moat a new listing must climb

Competition

Bad100%

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, thorne magnesium citrate is a $6.2M/yr Amazon United States market (1.2M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 53/100.

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

thorne magnesium citrate market data

Units sold / yr: 200K–250K; avg 50,000–60,000/product
Revenue / yr: $6.2M–$7.7M; units × avg price
Conversion rate: 16.4%
Avg BSR: #32
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 54 months
Avg seller age: 152 days

Competition & brand share

The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.

Brands

2 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

100%

Top 20: 100%

Open market

THORNE96%
Pure Encapsulations4%
Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 99 weeks — +11.4% search growth over the last 90 days.

Peak months: May, Jun, Jul · busiest ÷ quietest = 3.6×

Open Trend

Top thorne magnesium citrate search terms

thorne magnesium glycinate565K/yr +10.0%19.6% conv.
thorne magnesium bisglycinate175K/yr +35.9%12.5% conv.
thorne magnesium131K/yr -4.6%13.5% conv.
magnesium glycinate thorne81K/yr +3.6%17.2% conv.
throne magnesium glycinate28K/yr +23.8%15.7% conv.
magnesium thorne31K/yr +5.0%16.1% conv.
thorne magnesium citrate20K/yr +57.7%9.4% conv.
nordic naturals magnesium glycinate25K/yr -23.4%1.0% conv.
thorne magnesium bisglycinate powder20K/yr +13.4%9.6% conv.
thorne magnesium citramate22K/yr -10.5%25.9% conv.

All search terms

Top thorne magnesium citrate 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 4 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

THORNE - Magnesium Glycinate - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - Chelated Magnesium Capsules - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Servings

THORNE$25.394.7★2,847 rev

THORNE - Magnesium Bisglycinate - Powdered Magnesium Formula - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - NSF Certified for Sport - Gluten Dairy & Soy-Free - 60 Servings

THORNE$50.864.4★2,572 rev

THORNE - Magnesium CitraMate - Magnesium Citrate & Malate Supplement - Supports Heart Health Skeletal Muscles Cardiac & Lung Function Bone Density & More* - Third-Party Certified - 90 Servings

THORNE$21.394.7★5,557 rev

Pure Encapsulations Magnesium (Glycinate) - Supplement to Support Stress Relief Sleep Heart Health Nerves Muscles and Metabolism* - with Magnesium Glycinate - 90 Capsules

Pure Encapsulations$26.104.7★49,969 rev

Newest

by launch date

THORNE - Magnesium Glycinate - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - Chelated Magnesium Capsules - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Servings

THORNE$25.392,847 rev

1y ago

THORNE - Magnesium Bisglycinate - Powdered Magnesium Formula - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - NSF Certified for Sport - Gluten Dairy & Soy-Free - 60 Servings

THORNE$50.862,572 rev

9y ago

Pure Encapsulations Magnesium (Glycinate) - Supplement to Support Stress Relief Sleep Heart Health Nerves Muscles and Metabolism* - with Magnesium Glycinate - 90 Capsules

Pure Encapsulations$26.1049,969 rev

18y ago

THORNE - Magnesium CitraMate - Magnesium Citrate & Malate Supplement - Supports Heart Health Skeletal Muscles Cardiac & Lung Function Bone Density & More* - Third-Party Certified - 90 Servings

THORNE$21.395,557 rev

21y ago

What buyers say about thorne magnesium citrate

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

What buyers love

Sleep Quality25%

“Helps me sleep”

Quality-Overall20%

“This was just as effective as other quality brands”

Magnesium13%

“Best magnesium supplement Ive had yet”

Vitamin4%

“Favorite vitamin”

Advertised Vs Actual Product3%

“As advertised”

Stress/Anxiety3%

“less stress”

Muscle Pain Relief2%

“relieve muscle spasms”

Value For Money2%

“price was fair”

Efficiency2%

“The first bottle worked well”

Regulates Digestion2%

“Better bowel movement”

What buyers complain about

Sleep Quality15%

“I was having trouble sleeping”

Magnesium6%

“Other brands of magnesium were not as effective”

Side Effects6%

“intolerant side effect”

Quality-Overall5%

“Poor quality control”

Size-Overall5%

“Too Big”

Functionality-Overall4%

“in my case it just didnt stand out as particularly effective”

Acid Regulator/Stomach Ache Relief4%

“Upset my stomach so not for me”

Value For Money4%

“Overpriced”

Dosage4%

“A little low on mg”

Taste-Overall4%

“tastes like vomit”

Top return reasons

Functionality-Overall18%

Magnesium17%

Dosage10%

Acid Regulator/Stomach Ache Relief9%

Sleep Quality9%

Value For Money7%

Size-Overall6%

Advertised Vs Actual Product5%

Ease Of Chewing/Swallowing3%

Side Effects2%

Common questions

Is thorne magnesium citrate profitable to sell on Amazon United States?: The niche generates $6.2M/yr across 4 tracked products. 90-day search growth is +11.4%. Flapen's verdict: Worth a look (53/100).
How competitive is the thorne magnesium citrate niche?: 2 brands and 9 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in thorne magnesium citrate?: Top complaints mined from reviews: Sleep Quality, Magnesium, Side Effects. The return rate is 0.0%.
When does demand for thorne magnesium citrate peak?: Demand peaks in May–Jun–Jul; the busiest month runs 3.6× the quietest.
What does it cost to enter the thorne magnesium citrate niche?: Listings span $21.39–$50.86; the average listing price is $30.93 (sweet spot $15–$100). The average incumbent carries 15,236 reviews — the moat a new listing must climb.