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mass gainer

Skip it

Prices mostly outside the sweet spot ($119.02–$272.02) — this niche doesn't clear our bar today.

Market size 18Growth 33Conversion 9Competition 24Returns 99Price range 0Avg price 49Brand share 16Review moat 34Quality gap 88

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Quality gap

Great4.1★

avg incumbent rating — lower means beatable quality

Avg price

Okay$180.88

avg listing price — sweet spot $15–$100

Review moat

Okay3,142.07

avg incumbent reviews — the moat a new listing must climb

Growth

Okay+6.7%

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

Competition

Bad71%

top-5 click share — a locked-up shelf

Market size

Bad$70K

$70K/yr · 54K searches

Brand share

Bad93%

top-5 brand share — brand-locked demand

Conversion

Bad0.7%

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

Price range

Bad$119.02–$272.02

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

According to Flapen's Amazon Saudi Arabia niche tracking, mass gainer is a $70K/yr Amazon Saudi Arabia market (54K searches/yr). The top 5 brands hold 93% of demand. Verdict: Skip it — 37/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

mass gainer market data

Units sold / yr
250–500
avg 0–100/product
Revenue / yr
$45K–$90K
units × avg price
Conversion rate
0.7%
Avg BSR
#40
Page quality
0%
Prime
93%
Sponsored
0%
Out of stock
8.6%
Avg brand age
63 months
Avg seller age
53 days

Competition & brand share

The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 rising

Sellers

11

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

2%

  • Optimum Nutrition59%
  • Body Builder11%
  • Muscletech11%
  • Dymatize8%
  • Applied Nutrition4%
  • Basix4%
  • Open — no brand owns it (1 brand, 2%)

Demand

Weekly Amazon search volume, last 25 weeks — +6.7% search growth over the last 90 days.
1K750Spike '26Prime Day '26Feb '26Mar '26Mar '26Apr '26May '26Jun '26

Top mass gainer search terms

  • mass gainer37K/yr
  • ماس جينر7K/yr
  • بروتين ماس5K/yr
  • mass gainer protein powder4K/yr
All search terms

Top mass gainer 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.

0%10%$7K20%$14K30%$21K40%$28K1101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 15 tracked products in this niche — three views at once, no toggling.

What buyers say about mass gainer

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

What buyers love

الجودة الشاملة100%

“Good quality”

What buyers complain about

منظم الحموضة/تخفيف آلام المعدة100%

“Very bad not worth it i don't know why I'm buy this product when I drink this protein after I'm didn't eat anything because stomach sick”

Common questions

Is mass gainer profitable to sell on Amazon Saudi Arabia?
The niche generates $70K/yr across 15 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +6.7%. Flapen's verdict: Skip it (37/100).
How competitive is the mass gainer niche?
7 brands and 11 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 93% of demand.
What do buyers complain about in mass gainer?
Top complaints mined from reviews: منظم الحموضة/تخفيف آلام المعدة. The return rate is 0.2%.
What does it cost to enter the mass gainer niche?
Listings span $119.02–$272.02; the average listing price is $180.88 (sweet spot $15–$100). The average incumbent carries 3,142 reviews — the moat a new listing must climb.