Is just ingredients magnesium complex profitable to sell on Amazon United States?

The niche generates $16K/yr across 14 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is +121.5%. Flapen's verdict: Skip it (47/100).

How competitive is the just ingredients magnesium complex niche?

11 brands and 550 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 82% of demand.

What do buyers complain about in just ingredients magnesium complex?

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

What does it cost to enter the just ingredients magnesium complex niche?

Listings span $15.49–$48.47; the average listing price is $26.21 (sweet spot $15–$100). The average incumbent carries 9,373 reviews — the moat a new listing must climb.

Just Ingredients Magnesium Complex

Skip it

A small market ($16K/yr) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Growth

Incredible+121.5%

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

Avg price

Incredible$26.21

avg listing price — sweet spot $15–$100

Price range

Incredible$15.49–$48.47

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

Brand share

Okay82%

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

Conversion

Okay2.2%

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

Competition

Bad72%

top-5 click share — a locked-up shelf

Review moat

Bad9,373.43

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Market size

Bad$16K

$16K/yr · 27K searches

Signals Trending Low Review Barrier

Is just ingredients magnesium complex profitable on Amazon?

According to Flapen's Amazon United States niche tracking, just ingredients magnesium complex is a $16K/yr Amazon United States market (27K searches/yr). The top 5 brands hold 82% of demand. Verdict: Skip it — 47/100.

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

just ingredients magnesium complex market size & sales

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

Units sold / yr: 2K–2K; avg 250–500/product
Revenue / yr: $39K–$52K; units × avg price
Conversion rate: 2.2%
Avg BSR: #191
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 5.8%
Avg brand age: 65 months
Avg seller age: 160 days

Competition: brands, sellers & click share

The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 falling

Sellers

550

Top-5 brand share

82%

Top 20: 100%

Top-5 click share

72%

Top 20: 100%

Open market

14%

JUST INGREDIENTS32%
BIOptimizers18%
Micro Ingredients16%
THORNE10%
Pure Encapsulations7%
Sports Research4%
Open — no brand owns it (5 brands, 14%)

Top just ingredients magnesium complex 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 14 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

JUST INGREDIENTS Magnesium Complex - Five Bioavailable Forms for Relaxation Sleep Mood Support - 60 Capsules

JUST INGREDIENTS$48.474.7★128 rev

BIOptimizers Magnesium Breakthrough Supplement with 500mg - 7 Forms of Magnesium: Glycinate Malate Citrate and More - Natural Support for Sleep and Cognitive Function -30 Capsules- Calming Vitamins

BIOptimizers$20.614.6★18,865 rev

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

Micro Ingredients Pure Magnesium Complex 300 Capsules | Triple Magnesium Glycinate Malate Taurate with Vitamin C | 100% Chelated | Supports Muscles Nerves & Energy | Only Active Ingredients

Micro Ingredients$23.714.8★902 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

Sports Research Triple Magnesium Complex 300mg 120 Veggie Capules

Sports Research$23.24148 rev

5mo ago

Magnesium Complex for Women | Glycinate Citrate & More 20-in-1 Formula with D3 K2 (MK-7) B6 (as P5P) & Ashwagandha | 240 Vegetarian Capsules Filler Free Non-GMO

Micro Ingredients$23.46247 rev

9mo ago

Micro Ingredients 12in1 Magnesium Complex 1000 mg 240 Capsules Magnesium Glycinate Citrate Taurate Malate & More High Absorption Formula for Men & Women Chelated & Purified

Micro Ingredients$18.98161 rev

9mo ago

JUST INGREDIENTS Magnesium Complex - Five Bioavailable Forms for Relaxation Sleep Mood Support - 60 Capsules

JUST INGREDIENTS$48.47128 rev

1y ago

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

What reviews say buyers love and hate about just ingredients magnesium complex

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

What buyers love

Sleep Quality23%

“Great night sleep”

Quality-Overall18%

“Amazing quality”

Magnesium15%

“Best magnesium supplement that I have taken”

Vitamin5%

“very useful and effective vitamins”

Efficiency3%

“The first bottle worked well”

Value For Money3%

“Great buy”

Advertised Vs Actual Product3%

“As advertised”

Stress/Anxiety2%

“less stress”

Muscle Pain Relief2%

“Helps with muscle spasms”

Ease Of Chewing/Swallowing2%

“these capsules feel smooth”

What buyers complain about

Sleep Quality13%

“This does not help me sleep”

Magnesium7%

“I must not be able to tolerate magnesium”

Dosage7%

“A little low on mg”

Side Effects6%

“intolerant side effect”

Size-Overall5%

“Too Big”

Value For Money5%

“Waste of money”

Functionality-Overall5%

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

Acid Regulator/Stomach Ache Relief5%

“Upset stomach”

Quality-Overall4%

“Poor quality control”

Ease Of Chewing/Swallowing2%

“I could not swallow”

Top return reasons

Magnesium20%

Functionality-Overall12%

Acid Regulator/Stomach Ache Relief10%

Dosage9%

Value For Money8%

Sleep Quality8%

Size-Overall5%

Advertised Vs Actual Product4%

Ingredients-Overall4%

Vitamin3%

Common just ingredients magnesium complex questions

Is just ingredients magnesium complex profitable to sell on Amazon United States?: The niche generates $16K/yr across 14 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is +121.5%. Flapen's verdict: Skip it (47/100).
How competitive is the just ingredients magnesium complex niche?: 11 brands and 550 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 82% of demand.
What do buyers complain about in just ingredients magnesium complex?: Top complaints mined from reviews: Sleep Quality, Magnesium, Dosage. The return rate is 0.0%.
What does it cost to enter the just ingredients magnesium complex niche?: Listings span $15.49–$48.47; the average listing price is $26.21 (sweet spot $15–$100). The average incumbent carries 9,373 reviews — the moat a new listing must climb.