Casein Protein Powder Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Casein Protein Powder sales on Amazon US totaled 299,800 units in July 2026 (▼ 9.6% vs. the prior month), generating an estimated $14,063,998 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 63.0% of unit volume and 57.8% of revenue, while a typical listing is priced at $55.58. The keyword itself pulled 35,394 Amazon queries over the same period (▲ 7.8% MoM).
Zooming out to the 12-month window ending July 2026, the casein protein powder Top 50 moved 3,252,100 units and $141,130,831 in cumulative sales — an average of 271,008 units and $11,760,903 per month. Monthly throughput topped out at 331,800 units in June 2026 and dipped to 158,900 in May 2026, leaving the latest reading 10.5% higher than August 2025.
Casein Protein Powder 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
299.8K
▼ 9.6% MoM
Monthly Revenue 2026/07
$14.1M
▼ 11.2% MoM
Top 10 Market Share 2026/07
63.0%
Casein Protein Powder Market Share & Sales Concentration on Amazon US — July 2026
The most-sold casein protein powder listing on Amazon US in July 2026 is ASIN B00J074W94 (Brand: Orgain), which sold 40,000 units at $31.98 apiece — equal to 13.3% of every unit tracked in this report and 33% ahead of the No. 2 listing.
The Top 10 ASINs account for 189,000 units and $8,128,120 in July 2026 — 63.0% of unit volume and 57.8% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Casein Protein Powder' on Amazon
July 2026
Is 63.0% Top 10 share highly concentrated?
Ask AI to evaluate competition, market structure, and entry opportunities using ’s tracked Amazon sales, ranking, and keyword data.
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Top 5 Volume Share breakdown
B00J074W94
Orgain Organic Vegan Protein Powder, Creamy Chocolate Fudge - 21g Plant Protein, 6g Prebiotic Fiber, Low Net Carb, No Lactose Ingredients, No Added Sugar, Non-GMO, For Shakes & Smoothies, 2.03 lb | Plant based protein, 7g prebiotic fiber, low net carb, no added sugar or lactose ingredients, non-GMO, for shakes & smoothies
40K
▼ 20.0%vs. prior month
$1.2M
latest month
12-month trend
B000GISTZ4
Optimum Nutrition Gold Standard Whey Protein Powder, Vanilla Ice Cream, 2LB | 24g 100% Whey Protein Per Serving, with BCAAs, Gluten Free, Banned Substance Tested, Easy Mixing, Muscle Support & Recovery
30K
▲ 0.0%vs. prior month
$1.4M
latest month
12-month trend
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 | 24g of 100% Whey Protein Powder Per Serving, with BCAAs, Gluten Free, Banned Substance Tested, Easy Mixing, Muscle Support
20K
▼ 33.3%vs. prior month
$913.2K
latest month
12-month trend
B0CQ3JTR6F
Transparent Labs Grass-Fed Whey Protein - 30 Servings, French Vanilla | Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids
20K
▲ 0.0%vs. prior month
$1.2M
latest month
12-month trend
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
10K
▲ 0.0%vs. prior month
$1.1M
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Best Casein Protein Powder Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Optimum Nutrition is the best-performing casein protein powder brand in July 2026, moving 50,000 units across 2 ASINs for 26.5% of Top 10 volume. Orgain follows with 40,000 units (21.2%), ahead of Premier Protein on 30,000 units (15.9%).
With 8 brands splitting the Top 10 and 63.5% 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 $27.57 to $52.00, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Optimum Nutrition
2 ASINs in Top 10
26.5%
Units
50K
Revenue
$2.3M
Avg. price
$52.00
B000GISTZ4
$49.75·★4.7·48.6K revsOptimum Nutrition Gold Standard Whey Protein Powder, Vanilla Ice Cream, 2LB | 24g 100% Whey Protein Per Serving, with BCAAs, Gluten Free, Banned Substance Tested, Easy Mixing, Muscle Support & Recovery
Units sold30KB002DYIZH6
$54.25·★4.6·100K revsOptimum Nutrition Gold Standard Whey Protein, Double Rich Chocolate, 2 LB | 24g of 100% Whey Protein Powder Per Serving, with BCAAs, Gluten Free, Banned Substance Tested, Easy Mixing, Muscle Support
Units sold20K
Orgain
1 ASIN in Top 10
21.2%
Units
40K
Revenue
$1.2M
Avg. price
$31.98
B00J074W94
$31.98·★4.5·64.9K revsOrgain Organic Vegan Protein Powder, Creamy Chocolate Fudge - 21g Plant Protein, 6g Prebiotic Fiber, Low Net Carb, No Lactose Ingredients, No Added Sugar, Non-GMO, For Shakes & Smoothies, 2.03 lb | Plant based protein, 7g prebiotic fiber, low net carb, no added sugar or lactose ingredients, non-GMO, for shakes & smoothies
Units sold40K
Premier Protein
1 ASIN in Top 10
15.9%
Units
30K
Revenue
$864.3K
Avg. price
$27.57
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 sold30K
Trending Casein Protein Powder 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, 2 ASINs forced its way in: B0FST375QH booked 10K units at $22.88, with ▲ 25.0% MoM change. On the growth side, B06ZZ3PJQD leads positive momentum with ▲ 200.0% MoM growth on 30K 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.
B0FST375QH
nurri 30g Protein Ultra Filtered Milk Shake – Vanilla - Lactose Free, Low Sugar, 150 Calories, 10 Vitamins and Minerals - 11 fl oz, 10 Cans
Price
$22.88
Rating
4.6
Reviews
2.1K
Latest month sales
B0020XQWCA
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
$39.98
Rating
4.5
Reviews
9.5K
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
Unlock to view ASIN details and product titles
Price
$27.57
Rating
4.6
Reviews
29.3K
Latest month sales
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