Is cramp profitable to sell on Amazon United States?

The niche generates $211K/yr across 5 tracked products. 90-day search growth is +2.5%. Flapen's verdict: Skip it (44/100).

How competitive is the cramp niche?

4 brands and 48 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in cramp?

Top complaints mined from reviews: Functionality-Overall, Pain Relief-Overall, Muscle Pain Relief. The return rate is 0.0%.

When does demand for cramp peak?

Demand peaks in Oct–Nov–Dec; the busiest month runs 9.5× the quietest.

What does it cost to enter the cramp niche?

Listings span $9.77–$43.22; the average listing price is $20.05 (sweet spot $15–$100). The average incumbent carries 9,299 reviews — the moat a new listing must climb.

cramp

Skip it

A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible17.6%

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

Avg price

Great$20.05

avg listing price — sweet spot $15–$100

Price range

Great$9.77–$43.22

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

Market size

Okay$211K

$211K/yr · 60K searches

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Okay+2.5%

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

Review moat

Bad9,299.4

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, cramp is a $211K/yr Amazon United States market (60K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Skip it — 44/100.

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

cramp market data

Units sold / yr: 10K–13K; avg 2,500–3,000/product
Revenue / yr: $201K–$251K; units × avg price
Conversion rate: 17.6%
Avg BSR: #108
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 74 months
Avg seller age: 155 days

Competition & brand share

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

Brands

4 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

100%

Top 20: 100%

Open market

Cramp Defense76%
Hyland's16%
Pure Encapsulations4%
Qunol4%
Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +2.5% search growth over the last 90 days.

Peak months: Oct, Nov, Dec · busiest ÷ quietest = 9.5×

Open Trend

Top cramp search terms

cramp defense32K/yr -6.3%18.8% conv.
cramp defense for leg cramps 180 capsules16K/yr +44.4%17.2% conv.
muscle cramp supplement7K/yr +5.3%3.3% conv.
best supplement for muscle cramps3K/yr -25.2%0.7% conv.
cramp defense magnesium2K/yr -22.8%14.6% conv.

All search terms

Top cramp 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 5 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Cramp Defense Leg Cramps Pills Relief for All Muscle Cramps Day and Night. Magnesium Supplement Capsules 3-6 Month Supply. Non-Laxative Organic Formula for Max Absorption and Results. Made in US.

Cramp Defense$43.224.3★11,381 rev

Hylands Leg Cramps Relief of Leg Calf Charley Horses and Foot Cramps 100 Quick-Dissolving Tablets

Hyland's$12.174.7★8,258 rev

Hylands Leg Cramps PM Relief of Nighttime Leg Calf and Foot Cramps 50 Quick-Dissolving Tablets

Hyland's$9.774.4★16,381 rev

Pure Encapsulations Muscle Cramp/Tension Formula | Hypoallergenic Supplement to Reduce Occasional Muscle Cramps/Tension and Promote Relaxation* | 60 Capsules

Pure Encapsulations$18.974.5★768 rev

Qunol Magnesium 420mg Extra Strength High Absorption Vegetarian 180ct

Qunol$16.144.7★9,709 rev

Newest

by launch date

Qunol Magnesium 420mg Extra Strength High Absorption Vegetarian 180ct

Qunol$16.149,709 rev

2y ago

Hylands Leg Cramps Relief of Leg Calf Charley Horses and Foot Cramps 100 Quick-Dissolving Tablets

Hyland's$12.178,258 rev

5y ago

Cramp Defense Leg Cramps Pills Relief for All Muscle Cramps Day and Night. Magnesium Supplement Capsules 3-6 Month Supply. Non-Laxative Organic Formula for Max Absorption and Results. Made in US.

Cramp Defense$43.2211,381 rev

9y ago

Pure Encapsulations Muscle Cramp/Tension Formula | Hypoallergenic Supplement to Reduce Occasional Muscle Cramps/Tension and Promote Relaxation* | 60 Capsules

Pure Encapsulations$18.97768 rev

18y ago

Hylands Leg Cramps PM Relief of Nighttime Leg Calf and Foot Cramps 50 Quick-Dissolving Tablets

Hyland's$9.7716,381 rev

21y ago

What buyers say about cramp

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

What buyers love

Muscle Pain Relief22%

“to help with muscle cramps”

Efficiency12%

“Very effective”

Joint Pain12%

“Less leg discomfort”

Quality-Overall8%

“Solid brand”

Sleep Quality7%

“Sleep like a baby”

Value For Money4%

“GOOD VALUE FOR MONEY”

Ease Of Use4%

“Easy to use”

Magnesium4%

“BEST Magnesium in the Market”

Advertised Vs Actual Product3%

“As advertised”

Solubility3%

“I like that they dissolve easily”

What buyers complain about

Functionality-Overall19%

“it did not work with me”

Pain Relief-Overall11%

“its so painful”

Muscle Pain Relief10%

“I No muscle relief”

Value For Money6%

“costs too much”

Magnesium5%

“Low in magnesium glycinate”

Joint Pain4%

“Dont help with small or full on leg cramps”

Dosage3%

“When I read the back label I was concerned that the dose wasn't high enough”

Sleep Quality2%

“restlessness or sleeplessness that it says it will”

Ingredients-Overall2%

“Seems too be the main ingredient”

Quality-Overall2%

“Inconsistent manufacturing quality”

Top return reasons

Joint Pain50%

Magnesium25%

Size-Overall25%

Common questions

Is cramp profitable to sell on Amazon United States?: The niche generates $211K/yr across 5 tracked products. 90-day search growth is +2.5%. Flapen's verdict: Skip it (44/100).
How competitive is the cramp niche?: 4 brands and 48 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in cramp?: Top complaints mined from reviews: Functionality-Overall, Pain Relief-Overall, Muscle Pain Relief. The return rate is 0.0%.
When does demand for cramp peak?: Demand peaks in Oct–Nov–Dec; the busiest month runs 9.5× the quietest.
What does it cost to enter the cramp niche?: Listings span $9.77–$43.22; the average listing price is $20.05 (sweet spot $15–$100). The average incumbent carries 9,299 reviews — the moat a new listing must climb.