Is potassium magnesium supplement profitable to sell on Amazon United States?

The niche generates $975K/yr across 27 tracked products. 6 of 6 products launched in the last 360 days are still selling. 90-day search growth is +2.1%. Flapen's verdict: Launch it (62/100).

How competitive is the potassium magnesium supplement niche?

24 brands and 482 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 58% of demand.

What do buyers complain about in potassium magnesium supplement?

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

When does demand for potassium magnesium supplement peak?

Demand is steady year-round — the busiest month runs 1.4× the quietest.

What does it cost to enter the potassium magnesium supplement niche?

Listings span $7.59–$38.95; the average listing price is $19.15 (sweet spot $15–$100). The average incumbent carries 2,653 reviews — the moat a new listing must climb.

potassium magnesium supplement

Launch it

A $975K/yr market growing +2.1% this quarter with returns at 0.0% — clears our launch bar.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Great$19.15

avg listing price — sweet spot $15–$100

Conversion

Great8.2%

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

Market size

Great$975K

$975K/yr · 622K searches

Brand share

Great58%

top-5 brand share — no brand owns this niche

Price range

Great$7.59–$38.95

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

Competition

Good54%

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

Review moat

Okay2,653

avg incumbent reviews — the moat a new listing must climb

Growth

Okay+2.1%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Signals No Dominant Brand

According to Flapen's Amazon United States niche tracking, potassium magnesium supplement is a $975K/yr Amazon United States market (622K searches/yr). The top 5 brands hold 58% of demand. Verdict: Launch it — 62/100.

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

potassium magnesium supplement market data

Units sold / yr: 50K–60K; avg 2,000–2,500/product
Revenue / yr: $958K–$1.1M; units × avg price
Conversion rate: 8.2%
Avg BSR: #352
Page quality: 0%
Prime: 100%
Sponsored: 81%
Out of stock: 10.7%
Avg brand age: 59 months
Avg seller age: 151 days

Competition & brand share

The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.

Brands

24 rising

Sellers

482

Top-5 brand share

58%

Top 20: 96%

Top-5 click share

54%

Top 20: 93%

Open market

36%

Nutricost17%
MD.LIFE15%
Santa Cruz Paleo10%
Life Extension9%
Nobi Nutrition7%
Carlyle6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +2.1% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.4×

Open Trend

Top potassium magnesium supplement search terms

potassium magnesium supplement212K/yr -7.0%9.3% conv.
magnesium and potassium supplement54K/yr +4.0%6.5% conv.
magnesium potassium supplements52K/yr +10.3%6.8% conv.
magnesium potassium38K/yr -2.0%7.1% conv.
potassium and magnesium supplement28K/yr +10.9%7.6% conv.
citrato de magnesio y potasio36K/yr -13.7%2.0% conv.
magnesio y potasio37K/yr -22.2%3.3% conv.
potasio y magnesio30K/yr +19.0%3.0% conv.
potassium magnesium24K/yr +6.0%7.1% conv.
santa cruz magnesium14K/yr +38.8%10.5% conv.

All search terms

Top potassium magnesium supplement 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Nutricost Potassium (99mg) Magnesium (210 mg) Citrates 240 Capsules

Nutricost$13.854.6★3,623 rev

MD. Life Potassium Magnesium Supplement High Absorption 90 Capsules

MD.LIFE$19.654.6★8,569 rev

Life Extension Potassium with Extend-Release Magnesium Heart Health Supplement for Blood Pressure Support with Two Essential Minerals Non-GMO Vegetarian Gluten-Free 60 Capsules

Life Extension$9.624.6★6,753 rev

Santa Cruz Paleo Magnesium + Potassium Caps Supplement for Men and Women Paleo Keto Sugar & Gluten Free Magnesium Glycinate 166mg and Potassium Citrate 38mg per Serving American Made 60 Caps

Santa Cruz Paleo$20.014.6★633 rev

Potassium Magnesium Supplement High Strength Heart Health & Muscle Support

Nobi Nutrition$17.194.6★1,421 rev

Newest

by launch date

Magnesium Glycinate Potassium with D3 10 000 IU & K2 MK-7 180 Capsules

MEGNETA$38.9538 rev

3mo ago

Potassium Magnesium Supplement Liquid High Absorption Sugar Free 16 Fl

Alliwise$36.531,075 rev

6mo ago

Potassium Magnesium Gummies with Electrolytes & Vitamins - Magnesium Glycinate Potassium Citrate Calcium Vitamins B6 D3 & K2 for Muscle Function & Recovery - Vegan Strawberry 60 Count

Haohan$15.43100 rev

10mo ago

Potassium Magnesium Gummies High Absorption Magnesium Glycinate D3 & B6 Potassium Citrate - for Muscle Support Leg Cramps & Electrolyte Balance - Vegan Non-GMO Strawberry Flavor 60 Count

Saajoor$13.32143 rev

10mo ago

Potassium Magnesium Supplement Magnesium Potassium Zinc Supplement with Vitamin D3& K2 Support Immune for Women & Men Enhanced Absorption Non-GMO (120 Veg Capsules)

Lofei$19.79141 rev

1y ago

What buyers say about potassium magnesium supplement

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

What buyers love

Quality-Overall15%

“Good quality”

Muscle Pain Relief9%

“Amazing for muscle cramps”

Taste-Overall8%

“Tastes great, like real gummies if not better”

Sleep Quality8%

“Helps me sleep”

Vitamin8%

“Fun yum with vitamins”

Magnesium7%

“best tasting Magnesium gummies I've ever Tried”

Value For Money6%

“Great value”

Joint Pain5%

“They helped with my cramping of my leg”

Efficiency4%

“Effective”

Advertised Vs Actual Product3%

“Does as advertised”

What buyers complain about

Taste-Overall18%

“Does not taste good”

Magnesium9%

“This is a RIDICULOUSLY LOW dosage of magnesium”

Calcium5%

“Not a good source of potassium”

Size-Overall4%

“Kinda small”

Vitamin4%

“This batch of vitamin is smelt so bad never been happened before”

Ingredients-Overall3%

“Changes ingredients”

Texture/Consistency-Overall3%

“The texture is off as well”

Dosage3%

“Very tricky you have to take three of them in order to get the dose on the label”

Smell3%

“the odor seems abnormal”

Quality-Overall3%

“felt cheaply manufactured”

Top return reasons

Value For Money18%

Taste-Overall18%

Magnesium18%

Advertised Vs Actual Product9%

Artificial Sweeteners9%

Material Quality9%

Functionality-Overall9%

Vitamin9%

Common questions

Is potassium magnesium supplement profitable to sell on Amazon United States?: The niche generates $975K/yr across 27 tracked products. 6 of 6 products launched in the last 360 days are still selling. 90-day search growth is +2.1%. Flapen's verdict: Launch it (62/100).
How competitive is the potassium magnesium supplement niche?: 24 brands and 482 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 58% of demand.
What do buyers complain about in potassium magnesium supplement?: Top complaints mined from reviews: Taste-Overall, Magnesium, Calcium. The return rate is 0.0%.
When does demand for potassium magnesium supplement peak?: Demand is steady year-round — the busiest month runs 1.4× the quietest.
What does it cost to enter the potassium magnesium supplement niche?: Listings span $7.59–$38.95; the average listing price is $19.15 (sweet spot $15–$100). The average incumbent carries 2,653 reviews — the moat a new listing must climb.