Mass Gainer
MaybeAn 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 / 100Top 21% of 14,768 Health & Household niches · +7 vs the category median of 4956
- 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.
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
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 17, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Optimum Nutrition Serious Mass Weight Gainer Protein Powder Mass Gainer Vitamin C and Zinc for Immune Support Creatine Chocolate 6 Pound (Packaging May Vary)
- Price
- $49.75
- Rating
- 4.5/5
- Reviews
- 34,785
- Age
- 21y ago

Dymatize Super Mass Gainer Protein Powder Gourmet Vanilla 52g Protein 1g Creatine 1280 Calories 10.7g BCAAs 245g Carbs Contains Whey Protein Powder Isolate and Casein (8 Servings)
- Price
- $40.99
- Rating
- 4.5/5
- Reviews
- 9,328
- Age
- 17y ago

Optimum Nutrition Serious Mass Weight Gainer Protein Powder Mass Gainer Vitamin C and Zinc for Immune Support Creatine Vanilla 6 Pound (Packaging May Vary)
- Price
- $52.57
- Rating
- 4.5/5
- Reviews
- 19,920
- Age
- 21y ago

Optimum Nutrition Serious Mass Weight Gainer Protein Powder Mass Gainer Vitamin C and Zinc for Immune Support Creatine Chocolate 12 Pound (Packaging May Vary)
- Price
- $74.69
- Rating
- 4.5/5
- Reviews
- 34,785
- Age
- 22y ago

Dymatize Super Mass Gainer Protein Powder Gourmet Vanilla 52g Protein 1g Creatine 1280 Calories 10.7g BCAAs 245g Carbs Contains Whey Protein Isolate and Casein (16 Servings)
- Price
- $68.23
- Rating
- 4.5/5
- Reviews
- 9,328
- Age
- 14y ago
Trending
estimated 90-day click momentum
Nutricost Mass Gainer (Chocolate Peanut Butter Flavor 6.7 LBS) 50 Grams of Protein Per Serving - Non-GMO
- Price
- $44.04
- Rating
- 4.2/5
- Reviews
- 85
- Age
- 2y ago

NAKED Vanilla Mass - All Natural Vanilla Weight Gainer Protein Powder - 8lb Bulk NSF Certified GMO Free Gluten Free & Soy Free No Artificial Ingredients - 1 260 Calories - 11 Servings
- Price
- $69.84
- Rating
- 4.1/5
- Reviews
- 1,420
- Age
- 10y ago

Mutant Mass Extreme 2500 High Calorie Mass Gainer Whey Protein Powder for Muscle Building and Weight Gain Clean Calories with Whole Food Carbs - Triple Chocolate 2.2 lb
- Price
- $23.34
- Rating
- 4.4/5
- Reviews
- 2,766
- Age
- 8mo ago

Rule 1 Proteins Mass Gainer Chocolate Fudge 8 Servings
- Price
- $32.14
- Rating
- 4.4/5
- Reviews
- 144
- Age
- 3y ago

Dymatize Super Mass Gainer Protein Powder Gourmet Vanilla 52g Protein 1g Creatine 1280 Calories 10.7g BCAAs 245g Carbs Contains Whey Protein Isolate and Casein (16 Servings)
- Price
- $68.23
- Rating
- 4.5/5
- Reviews
- 9,328
- Age
- 14y ago
Newest
by launch date
Mutant Mass Extreme 2500 High Calorie Mass Gainer Whey Protein Powder for Muscle Building and Weight Gain Clean Calories with Whole Food Carbs - Triple Chocolate 2.2 lb
- Price
- $23.34
- Rating
- 4.4/5
- Reviews
- 2,766
- Age
- 8mo ago

Nutricost Mass Gainer (Chocolate Peanut Butter Flavor 6.7 LBS) 50 Grams of Protein Per Serving - Non-GMO
- Price
- $44.04
- Rating
- 4.2/5
- Reviews
- 85
- Age
- 2y ago

Nutricost Mass Gainer Double Chocolate Flavor 7 LBS 50 Grams of Protein Per Serving - Non-GMO & Gluten Free
- Price
- $44.07
- Rating
- 4.4/5
- Reviews
- 136
- Age
- 2y ago

Rule 1 Proteins Mass Gainer Chocolate Fudge 8 Servings
- Price
- $32.14
- Rating
- 4.4/5
- Reviews
- 144
- Age
- 3y ago

NAKED Vanilla Mass - All Natural Vanilla Weight Gainer Protein Powder - 8lb Bulk NSF Certified GMO Free Gluten Free & Soy Free No Artificial Ingredients - 1 260 Calories - 11 Servings
- Price
- $69.84
- Rating
- 4.1/5
- Reviews
- 1,420
- Age
- 10y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 63% of clicks. Leaders hold, but buyers still shop past them.
Brands
7 falling
Sellers
31
Est. top-5 brand share
95%
Top 20: 100%
Est. top-5 click share
63%
Top 20: 100%
Open market
2%
- Optimum Nutrition46%
- Dymatize31%
- NAKED9%
- Nutricost5%
- Rule 1 Proteins4%
- Mutant3%
- Open — no brand owns it (1 brand, 2%)
Demand
Mass Gainer search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.3×
Search terms
Top Mass Gainer search terms shoppers use
The exact words shoppers type, with estimated 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.
“Not for me - taste gross”
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
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Mass Gainer questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









