Is epo profitable to sell on Amazon United States?

The niche generates $123K/yr across 17 tracked products. 90-day search growth is -4.6%. Flapen's verdict: Skip it (44/100).

How competitive is the epo niche?

15 brands and 58 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 71% of demand.

What do buyers complain about in epo?

Top complaints mined from reviews: Functionality-Overall, Dosage, Side Effects. The return rate is 0.1%.

When does demand for epo peak?

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

What does it cost to enter the epo niche?

Listings span $14.77–$527.67; the average listing price is $68.26 (sweet spot $15–$100). The average incumbent carries 3,387 reviews — the moat a new listing must climb.

epo

Skip it

Prices mostly outside the sweet spot ($14.77–$527.67) — this niche doesn't clear our bar today.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Avg price

Great$68.26

avg listing price — sweet spot $15–$100

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Brand share

Good71%

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

Conversion

Okay3.6%

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

Review moat

Okay3,386.88

avg incumbent reviews — the moat a new listing must climb

Market size

Okay$123K

$123K/yr · 50K searches

Competition

Okay68%

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

Growth

Bad-4.6%

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

Price range

Bad$14.77–$527.67

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

Signals High Price

According to Flapen's Amazon United States niche tracking, epo is a $123K/yr Amazon United States market (50K searches/yr). The top 5 brands hold 71% of demand. Verdict: Skip it — 44/100.

Data updated Jul 8, 2026 · scored weekly · How we score niches

epo market data

Units sold / yr: 2K–2K; avg 0–100/product
Revenue / yr: $102K–$137K; units × avg price
Conversion rate: 3.6%
Avg BSR: #693
Page quality: 0%
Prime: 94%
Sponsored: 94%
Out of stock: 0.0%
Avg brand age: 77 months
Avg seller age: 161 days

Competition & brand share

The top 5 products take 68% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 rising

Sellers

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

68%

Top 20: 100%

Open market

23%

EPO-Boost28%
VO2-Boost13%
Inhale12%
Pure Encapsulations12%
FIRST ENDURANCE7%
Novex Biotech6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -4.6% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.4×

Open Trend

Top epo search terms

epo21K/yr -4.3%1.8% conv.
vo2 max13K/yr -5.0%1.2% conv.
epo boost5K/yr -2.1%6.4% conv.
vo2 boost2K/yr +56.6%4.8% conv.
vo23K/yr -4.3%1.4% conv.
vo2 max supplement4K/yr -21.6%2.1% conv.
v02 max3K/yr -32.0%2.1% conv.

All search terms

Top epo 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 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

EPO-BOOST Natural Blood Builder Iron Supplement. RBC Support Made in USA with Echinacea & Dandelion Root helping VO2 Max Energy Endurance (1-Pack)

EPO-Boost$52.974.2★888 rev

VO2-Boost Natural Endurance and Oxygen Supplement to Help VO2 max w/Rhodiola Rosea B12 and Alpha Lipoic Acid (120 Capsules) (30 Day Supply)

VO2-Boost$41.814.3★212 rev

Inhale$19.614.3★2,013 rev

Pure Encapsulations E.P.O. (Evening Primrose Oil) | Hypoallergenic Dietary Supplement Containing 9% GLA | 100 Softgel Capsules

Pure Encapsulations$31.884.7★475 rev

FIRST ENDURANCE OptygenHP - Premium Endurance Supplement | Boost Power | Increase Performance and Endurance | Improves Oxygen Utilization| 120 Capsules

FIRST ENDURANCE$77.314.7★127 rev

Newest

by launch date

Happy Runner: Pre-Run - Enhances Breathing Improved Oxygen Delivery Respiratory Efficiency Boosts Endurance Nitric Oxide Booster Improved Blood Flow Running Supplements Cardiovascular Health

Happy Runner$37.0029 rev

1y ago

Maximus Lung Trainer Device | VO2 Max Trainer for Endurance Training Breathing Exercise & Lung Capacity Portable Resistance Exerciser for Supporting Fitness & Oxygen

Maximus$58.7690 rev

2y ago

Freak Shake Grit Fuel Endurance Activator | Epicatechin & IsoQuercetin | Bioenergetic Optimizer for Cardio Training & Peak VO2 Max | 30 Day Supply

Freak Shake$32.5133 rev

2y ago

Novex Biotech Oxydrene NAD+ Enhancer - Natural Supplement Promoting Metabolism and Cardiovascular Support for Men and Women - (60 Capsules)

Novex Biotech$38.21505 rev

4y ago

Nutricost Nitric Oxide Booster 2250mg 180 Capsules - 750mg Per Casule 60 Servings - Gluten Free and Non-GMO

Nutricost$14.7713,609 rev

4y ago

What buyers say about epo

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

What buyers love

Quality-Overall17%

“I've had it for about a year now, good quality, works well”

Efficiency9%

“found them to be highly effective”

Value For Money9%

“Low price”

Advertised Vs Actual Product9%

“Worked as advertised”

Breathability7%

“It helps a lot holding your breath”

Energy Level6%

“helps with energy”

Vitamin5%

“Great supplement”

Nutritional Content3%

“Great quality supplement”

Muscle Pain Relief3%

“This has helped my muscles recover faster”

Menstrual Issues2%

“it has helped tremendously with my menstrual comfort”

What buyers complain about

Functionality-Overall9%

“Didn't work for me”

Dosage8%

“Low volume per dose”

Side Effects6%

“Gave me anemic symtoms”

Value For Money5%

“Basically a waste of money”

Acid Regulator/Stomach Ache Relief5%

“my stomach dont agree”

Instructions/User Manual/Troubleshooting4%

“Delivery Instructions not followed”

Blood Pressure3%

“my diastolic BP was still just not getting where I wanted it”

Taste-Overall3%

“No taste-large”

Vegan/Organic3%

“is not Halal or Kosher friendly”

Size-Overall3%

“are LONG”

Top return reasons

Functionality-Overall21%

Breathability18%

Size-Overall12%

Advertised Vs Actual Product9%

Defective Material/Parts7%

Comfort-Overall7%

Ease Of Use5%