Fiber Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Fiber sales on Amazon US totaled 865,000 units in July 2026 (▲ 2.1% vs. the prior month), generating an estimated $16,790,090 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 49.7% of unit volume and 51.8% of revenue, while a typical listing is priced at $19.68. The keyword itself pulled 179,621 Amazon queries over the same period (▲ 8.4% MoM).
Zooming out to the 12-month window ending July 2026, the fiber Top 50 moved 8,406,350 units and $158,864,221 in cumulative sales — an average of 700,529 units and $13,238,685 per month. Monthly throughput topped out at 865,000 units in July 2026 and dipped to 475,800 in May 2026, leaving the latest reading 29.3% higher than August 2025.
Fiber 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
865K
▲ 2.1% MoM
Monthly Revenue 2026/07
$16.8M
▲ 3.2% MoM
Top 10 Market Share 2026/07
49.7%
Fiber Market Share & Sales Concentration on Amazon US — July 2026
The most-sold fiber listing on Amazon US in July 2026 is ASIN B003CT2YQY (Brand: Metamucil), which sold 60,000 units at $34.97 apiece — equal to 6.9% of every unit tracked in this report.
The Top 10 ASINs account for 430,000 units and $8,689,100 in July 2026 — 49.7% of unit volume and 51.8% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Fiber' on Amazon
July 2026
Is 49.7% Top 10 share highly concentrated?
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Top 5 Volume Share breakdown
B003CT2YQY
Metamucil 4-in-1 Psyllium Husk GLP-1 Friendly Fiber Supplement, Sugar-Free, 180 teaspoons, Orange Flavored, Daily Fiber Powder for Digestive Health, made with Plant-Based Psyllium Husk Fiber
60K
▲ 20.0%vs. prior month
$2.1M
latest month
12-month trend
B07GPGQJR4
Amazon Basics Soft Fiber Gummies for Digestive Health and Regularity, Orange, Lemon & Strawberry Flavors, 90 Count, Pack of 1 (Previously Solimo)
60K
▲ 20.0%vs. prior month
$561.6K
latest month
12-month trend
B0BDP24LP4
Metamucil Fiber Gummies for Adults, No Sugar Added Orange Flavor, 5g Prebiotic Plant Based Fiber Supplement Blend, 120 Count
60K
▲ 0.0%vs. prior month
$1.5M
latest month
12-month trend
B00MPQ5ZOS
BBF Organic Chia Seeds 32 Oz, Omega-3 & Fiber, Pudding, Smoothies, Oatmeal | High Fiber Chia Seeds, Omega 3s, Plant-Based Protein, Overnight Oats, Egg Replacement for Baking, BetterBody Foods
50K
▼ 16.7%vs. prior month
$698.5K
latest month
12-month trend
B001TH7K0G
Metamucil, Psyllium Husk GLP-1 Friendly Fiber Capsules, 300 Capsules, 3-in-1 Fiber Supplement, Daily Psyllium Husk Fiber Capsules Help Support Digestive Health by Promoting Regularity*
40K
▲ 100.0%vs. prior month
$1.2M
latest month
12-month trend
B00CX3ASFE
Benefiber Prebiotic Fiber Supplement Powder, Unflavored, 250 Teaspoons | Plant-based Prebiotic Fiber Powder, Sugar-Free, Dissolves Clear and Tasteless, GLP-1 Support for Digestive Health
40K
▲ 0.0%vs. prior month
$925.6K
latest month
12-month trend
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Best Fiber Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Metamucil is the best-performing fiber brand in July 2026, moving 190,000 units across 4 ASINs for 44.2% of Top 10 volume. Amazon Basics follows with 60,000 units (14.0%), ahead of BetterBody Foods on 50,000 units (11.6%).
With 7 brands splitting the Top 10 and 69.8% 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 $10.13 to $25.41, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Metamucil
4 ASINs in Top 10
44.2%
Units
190K
Revenue
$5.3M
Avg. price
$25.41
B003CT2YQY
$34.97·★4.7·35.4K revsMetamucil 4-in-1 Psyllium Husk GLP-1 Friendly Fiber Supplement, Sugar-Free, 180 teaspoons, Orange Flavored, Daily Fiber Powder for Digestive Health, made with Plant-Based Psyllium Husk Fiber
Units sold60KB0BDP24LP4
$24.95·★4.6·17.5K revsMetamucil Fiber Gummies for Adults, No Sugar Added Orange Flavor, 5g Prebiotic Plant Based Fiber Supplement Blend, 120 Count
Units sold60KB001TH7K0G
$25.13·★4.6·27.1K revsMetamucil, Psyllium Husk GLP-1 Friendly Fiber Capsules, 300 Capsules, 3-in-1 Fiber Supplement, Daily Psyllium Husk Fiber Capsules Help Support Digestive Health by Promoting Regularity*
Units sold40KB000052Y5Q
$16.57·★4.6·9K revsMetamucil 4-in-1 Psyllium Husk GLP-1 Friendly Fiber Supplement, Sugar-Free, 72 teaspoons, Orange Flavored, Daily Fiber Powder for Digestive Health, made with Plant-Based Psyllium Husk Fiber
Units sold30K
Amazon Basics
1 ASIN in Top 10
14.0%
Units
60K
Revenue
$561.6K
Avg. price
$10.13
B07GPGQJR4
$10.13·★4.5·18.3K revsAmazon Basics Soft Fiber Gummies for Digestive Health and Regularity, Orange, Lemon & Strawberry Flavors, 90 Count, Pack of 1 (Previously Solimo)
Units sold60K
BetterBody Foods
1 ASIN in Top 10
11.6%
Units
50K
Revenue
$698.5K
Avg. price
$13.97
B00MPQ5ZOS
$13.97·★4.7·110K revsBBF Organic Chia Seeds 32 Oz, Omega-3 & Fiber, Pudding, Smoothies, Oatmeal | High Fiber Chia Seeds, Omega 3s, Plant-Based Protein, Overnight Oats, Egg Replacement for Baking, BetterBody Foods
Units sold50K
Trending Fiber 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: B005P0XUAM booked 20K units at $11.00, with ▲ 0.0% MoM change. On the growth side, B0007CXWC4 leads positive momentum with ▲ 2566.7% MoM growth on 8K units, with B000N7DP6G close behind at ▲ 1900.0% 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.
B005P0XUAM
NOW Foods Supplements, Psyllium Husk Caps 500 mg, Non-GMO Project Verified, Natural Soluble Fiber, Intestinal Health*, 200 Veg Capsules
Price
$11.00
Rating
4.6
Reviews
31.8K
Latest month sales
B0007CXWC4
American Crew Men's Hair Fiber, Like Hair Gel with High Hold & Low Shine, 3 oz | Hair fiber that thickens, texturizes & adds fullness. High hold, matte low-shine finish. For straight to wavy hair.
Price
$15.07
Rating
4.6
Reviews
31.6K
Latest month sales
B000N7DP6G
NOW Foods Supplements, Whole Psyllium Husks, Non-GMO Project Verified, Soluble Fiber, 16-Ounce
Unlock to view ASIN details and product titles
Price
$11.76
Rating
4.6
Reviews
12.6K
Latest month sales
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