Whey Protein Isolate Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Whey Protein Isolate sales on Amazon US totaled 390,000 units in July 2026 (▼ 0.8% vs. the prior month), generating an estimated $21,612,910 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 43.6% of unit volume and 42.8% of revenue, while a typical listing is priced at $63.94. The keyword itself pulled 92,418 Amazon queries over the same period (▲ 8.9% MoM).
Zooming out to the 12-month window ending July 2026, the whey protein isolate Top 50 moved 4,041,850 units and $209,691,530 in cumulative sales — an average of 336,821 units and $17,474,294 per month. Monthly throughput topped out at 393,000 units in June 2026 and dipped to 200,100 in May 2026, leaving the latest reading 11.1% higher than August 2025.
Whey Protein Isolate Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
390K
▼ 0.8% MoM
Monthly Revenue 2026/07
$21.6M
▼ 6.1% MoM
Top 10 Market Share 2026/07
43.6%
Whey Protein Isolate Market Share & Sales Concentration on Amazon US — July 2026
The most-sold whey protein isolate listing on Amazon US in July 2026 is ASIN B06ZZ3PJQD (Brand: Premier Protein), which sold 30,000 units at $27.57 apiece — equal to 7.7% of every unit tracked in this report and 1.5× the volume of the No. 2 listing.
The Top 10 ASINs account for 170,000 units and $9,253,100 in July 2026 — 43.6% of unit volume and 42.8% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Whey Protein Isolate' on Amazon
July 2026
Is 43.6% Top 10 share highly concentrated?
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Top 5 Volume Share breakdown
B06ZZ3PJQD
Premier Protein 30g High Protein Powder, 100% Whey, Vanilla, 17 Servings | No Added Sugar, Supports Muscle Health, Soy & Gluten-Free, 1.5 lb
30K
▲ 200.0%vs. prior month
$864.3K
latest month
12-month trend
B002DYIZH6
Optimum Nutrition Gold Standard Whey Protein, Double Rich Chocolate, 2 LB
20K
▼ 33.3%vs. prior month
$913.2K
latest month
12-month trend
B06Y5ZG66K
Premier Protein 30g High Protein Powder, 100% Whey, Chocolate, 17 Servings | No Added Sugar, Supports Muscle Health, Soy & Gluten-Free, 1.44 lb
20K
▲ 100.0%vs. prior month
$570.6K
latest month
12-month trend
B099J2SWXV
Dymatize ISO100 Protein Powder, 100% Whey Isolate, Gourmet Vanilla | 25g Protein, Hydrolyzed, Fast-Absorbing, Supports Muscle Health, 5.5g BCAAs, Gluten-Free, 20 Servings, 1.3 lb
20K
▲ 100.0%vs. prior month
$752.4K
latest month
12-month trend
B0CQ32D39X
Transparent Labs Grass-Fed Whey Protein Isolate - Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids - 30 Servings, Milk Chocolate
20K
▲ 0.0%vs. prior month
$1.2M
latest month
12-month trend
B0CQ3JTR6F
Transparent Labs Grass-Fed Whey Protein Isolate - Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids - 30 Servings, French Vanilla
20K
▲ 0.0%vs. prior month
$1.2M
latest month
12-month trend
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Best Whey Protein Isolate Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Premier Protein is the best-performing whey protein isolate brand in July 2026, moving 50,000 units across 2 ASINs for 29.4% of Top 10 volume. Optimum Nutrition follows with 50,000 units (29.4%), ahead of Transparent Labs on 40,000 units (23.5%).
With 4 brands splitting the Top 10 and 82.4% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $28.77 to $84.42, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Premier Protein
2 ASINs in Top 10
29.4%
Units
50K
Revenue
$1.4M
Avg. price
$28.77
B06ZZ3PJQD
$27.57·★4.6·29.3K revsPremier Protein 30g High Protein Powder, 100% Whey, Vanilla, 17 Servings | No Added Sugar, Supports Muscle Health, Soy & Gluten-Free, 1.5 lb
Units sold30KB06Y5ZG66K
$29.97·★4.6·28.4K revsPremier Protein 30g High Protein Powder, 100% Whey, Chocolate, 17 Servings | No Added Sugar, Supports Muscle Health, Soy & Gluten-Free, 1.44 lb
Units sold20K
Optimum Nutrition
4 ASINs in Top 10
29.4%
Units
50K
Revenue
$3.6M
Avg. price
$84.42
B002DYIZH6
$48.83·★4.6·99.9K revsOptimum Nutrition Gold Standard Whey Protein, Double Rich Chocolate, 2 LB
Units sold20KB000GISU1M
$96.28·★4.7·48.6K revsOptimum Nutrition Gold Standard Whey Protein Powder, Vanilla Ice Cream, 5LB
Units sold10KB000QSNYGI
$96.28·★4.6·99.9K revsOptimum Nutrition Gold Standard Whey Protein, Double Rich Chocolate, 5 LB | 24g of 100% Whey Protein Powder Per Serving, with BCAAs, Gluten Free, Banned Substance Tested, Easy Mixing, Muscle Support
Units sold10KB000QSTBNS
$96.28·★4.7·29.9K revsOptimum Nutrition Gold Standard Whey Protein, Extreme Milk Chocolate, 5 LB | 24g of 100% Whey Protein Powder Per Serving, with BCAAs, Gluten Free, Banned Substance Tested, Easy Mixing, Muscle Support
Units sold10K
Transparent Labs
2 ASINs in Top 10
23.5%
Units
40K
Revenue
$2.4M
Avg. price
$59.99
B0CQ32D39X
$59.99·★4.7·1.9K revsTransparent Labs Grass-Fed Whey Protein Isolate - Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids - 30 Servings, Milk Chocolate
Units sold20KB0CQ3JTR6F
$59.99·★4.5·1.7K revsTransparent Labs Grass-Fed Whey Protein Isolate - Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids - 30 Servings, French Vanilla
Units sold20K
Trending Whey Protein Isolate Products — Growth Leaders & New Top 10 Entrants
Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B00G6QHYZ6 booked 10K units at $108.99, with ▲ 0.0% MoM change. On the growth side, B06ZZ3PJQD leads positive momentum with ▲ 200.0% MoM growth on 30K units, with B06Y5ZG66K close behind at ▲ 100.0% MoM on 20K units.
The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.
B00G6QHYZ6
Dymatize ISO100 Protein Powder, 100% Whey Isolate, Gourmet Vanilla | 25g Protein, Hydrolyzed, Fast-Absorbing, Supports Muscle Health, 5.5g BCAAs, Gluten-Free, 76 Servings, 5 lb
Price
$108.99
Rating
4.6
Reviews
20.6K
Latest month sales
B06ZZ3PJQD
Premier Protein 30g High Protein Powder, 100% Whey, Vanilla, 17 Servings | No Added Sugar, Supports Muscle Health, Soy & Gluten-Free, 1.5 lb
Price
$27.57
Rating
4.6
Reviews
29.3K
Latest month sales
B06Y5ZG66K
Premier Protein 30g High Protein Powder, 100% Whey, Chocolate, 17 Servings | No Added Sugar, Supports Muscle Health, Soy & Gluten-Free, 1.44 lb
Unlock to view ASIN details and product titles
Price
$29.97
Rating
4.6
Reviews
28.4K
Latest month sales
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