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Mass Gainer

Maybe

An estimated 0.0% of orders come back. But the top 5 brands take 95% of clicks, so Mass Gainer is a Maybe.

Flapen Score
56
56 / 100
Top 21% of 14,768 Health & Household niches · +7 vs the category median of 49
Market size
$5.7M/yr2.7M searches / yr
90-day growth
+1.7%search demand this quarter
Competition
63%top-5 click share · 7 brands · 31 sellers

Flapen Score

Mass Gainer against its category

The dotted line is the Health & Household average. Past it, Mass Gainer is stronger. Inside it, weaker.

56Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Mass Gainer market on Amazon at a glance

Shoppers on Amazon United States searched for Mass Gainer 2.7M times last year and spent an estimated $5.7M. The top 5 brands take 95% of clicks. Flapen scores it 56 out of 100, a Maybe.

01 · Demand

An estimated 3.9% of those searches ended in a purchase.

Shoppers searched for this 2.7M times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 3.9% of those searches ended in a purchase. Searches in the last 90 days moved +1.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated $5.7M a year.

Searches, last 12 months
2.7M
Growth, 90 days vs prior 90
+1.7%
Conversion, latest week
3.9%
Market size, estimated
$5.7Ma year
Peak month
September1.3× the quietest month
Top search term
mass gainer1.1M searches a year

02 · Price

A sale here is worth $54.04.

Listings sell for $54.04 on average, from $23.31 to $78.68. Amazon reports units sold in ranges. This niche sold 80K to 100K a year. The average listing sells 3,000 to 4,000 of them. At $54.04 that is $162K to $216K a year per listing.

Average price
$54.04inside the $15 to $100 sweet spot
Price range
$23.31–$78.68
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
80K–100K
Units per listing a year
3,000–4,000
Revenue per listing a year
$162K–$216K
Returns
0.0%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is reviews.

56% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 10.5% of listings are out of stock. The average listing ranks #134 within Weight Gainers. It carries 8,693 reviews at 4.41 stars, so a new listing needs social proof before a better product.

Sponsored listings
56%
Prime listings
100%
Out of stock, average day
10.5%
Average rank
#134in Weight Gainers
Average rating
4.41 starsAmazon United States average 4.42 stars
Average reviews
8,693per listing
Listings tracked
18

04 · Newcomers

1 of last year's 1 launches cleared the first-year sales bar.

1 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 73 months on average, so the names here are established.

Launched, last 12 months
1
Successful launches
1Amazon's first-year sales bar
Average brand age
73 months

Products

Top Mass Gainer products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Sign in to see the products

The products selling in this niche are for signed-in readers. Every market figure above stays open to everyone.

Competition

Competition: brands, sellers & click share

The top 5 products take 63% of clicks. Leaders hold, but buyers still shop past them.

Brands

7 falling

Sellers

31

Top-5 brand share

95%

Top 20: 100%

Top-5 click share

63%

Top 20: 100%

Open market

2%

  • Brand 146%
  • Brand 231%
  • Brand 39%
  • Brand 45%
  • Brand 54%
  • Brand 63%
  • Open — no brand owns it (1 brand, 2%)

Demand

Mass Gainer search demand

Weekly searches over the year, seasonality beneath. Pick a range.

60K40KSpike '24Prime Day '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.3×

Search terms

Top Mass Gainer search terms shoppers use

The exact words shoppers type, with yearly volume, growth, and conversion.

  • mass gainer1.1M/yr
  • mass gainer protein powder279K/yr
  • weight gainer231K/yr
  • weight gainer men224K/yr
  • serious mass weight gainer127K/yr
  • serious mass128K/yr
  • mass113K/yr
  • weight gainer protein powder71K/yr
  • high calorie protein powder58K/yr
  • optimum nutrition serious mass50K/yr

Reviews and returns

What reviews say buyers love and hate about Mass Gainer

We read the reviews and the return reasons for every product selling here.

24%of positive reviews mention “Taste-Overall”
11%of negative reviews mention “Taste-Overall”
<0.1%of orders come back, a rate Amazon rounds to zero
“Not for me - taste gross”
A buyer, on “Taste-Overall”11% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

14 topics

NegativePositive

FAQ

Common Mass Gainer questions

Answered from the same tracked data.