K18 Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
K18 sales on Amazon US totaled 735,000 units in July 2026 (▼ 38.3% vs. the prior month), generating an estimated $24,033,640 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 50.3% of unit volume and 54.0% of revenue, while a typical listing is priced at $29.75. The keyword itself pulled 315,949 Amazon queries over the same period (▲ 15.5% MoM).
Zooming out to the 12-month window ending July 2026, the k18 Top 50 moved 8,989,200 units and $295,370,682 in cumulative sales — an average of 749,100 units and $24,614,224 per month. Monthly throughput topped out at 1,191,000 units in June 2026 and dipped to 421,000 in May 2026, leaving the latest reading 5.3% higher than August 2025.
K18 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
735K
▼ 38.3% MoM
Monthly Revenue 2026/07
$24M
▼ 37.4% MoM
Top 10 Market Share 2026/07
50.3%
K18 Market Share & Sales Concentration on Amazon US — July 2026
The most-sold k18 listing on Amazon US in July 2026 is ASIN B07QZ5CTTF (Brand: Nutrafol), which sold 90,000 units at $88.00 apiece — equal to 12.2% of every unit tracked in this report and 1.8× the volume of the No. 2 listing.
The Top 10 ASINs account for 370,000 units and $12,971,800 in July 2026 — 50.3% of unit volume and 54.0% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'K18' on Amazon
July 2026
Is 50.3% 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
B07QZ5CTTF
Nutrafol Women's Balance Hair Growth Supplements, Age 45+, 1-Month Bottle | #1 Dermatologist-Recommended Hair Growth Supplement Brand, Clinically Tested for Visibly Thicker Hair and Scalp Coverage
90K
▼ 10.0%vs. prior month
$7.9M
latest month
12-month trend
B09HR5KSR8
K18 Leave-In Molecular Repair Hair Mask, Patented, Lasting Repair For Dry, Frizzy, Damaged Hair, Reverse Damage In 4 Minutes From Bleach, Color, Chemical Services + Heat
50K
▲ 25.0%vs. prior month
$1.4M
latest month
12-month trend
B076FHJ3K5
Marc Anthony Grow Long, Detangling Leave-In Hair Conditioner Spray | Anti-Frizz Anti-Breakage Hair Care for Dry Damaged Hair & Split Ends - Biotin, Vitamin E, Caffeine & Ginseng - Sulfate Free
40K
▼ 20.0%vs. prior month
$330K
latest month
12-month trend
B07N7PK9QK
Mielle Organics Rosemary Mint Hair Oil with Biotin, 2 oz | Hair strengthening oil, with biotin & castor oil, dry scalp care, split end support, frizz smoothing
40K
▼ 33.3%vs. prior month
$385.2K
latest month
12-month trend
B01I2ZQJSG
Elizavecca cer-100 collagen coating hair protein treatment 100ml
30K
▲ 200.0%vs. prior month
$203.1K
latest month
12-month trend
B08T2WP81T
Pantene Miracle Rescue 10in1 Multitasking Spray - Heat Protection, Detangles, Repairs Damaged, Dry Hair, Improves Shine, Leave-In Conditioning Treatment with Keratin and Pro-Vitamin B5, 5.7 oz
30K
▲ 50.0%vs. prior month
$384.9K
latest month
12-month trend
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Best K18 Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Nutrafol is the best-performing k18 brand in July 2026, moving 90,000 units across 1 ASIN for 24.3% of Top 10 volume. K18 follows with 50,000 units (13.5%), ahead of Marc Anthony on 40,000 units (10.8%).
Volume is spread across 10 brands, with the top three holding 48.6% between them. No single label controls the shelf, which usually leaves room for a well-differentiated listing to take share without outspending an incumbent. Average selling prices among the leaders run from $7.67 to $88.00, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Nutrafol
1 ASIN in Top 10
24.3%
Units
90K
Revenue
$7.9M
Avg. price
$88.00
B07QZ5CTTF
$88.00·★4.1·15.7K revsNutrafol Women's Balance Hair Growth Supplements, Age 45+, 1-Month Bottle | #1 Dermatologist-Recommended Hair Growth Supplement Brand, Clinically Tested for Visibly Thicker Hair and Scalp Coverage
Units sold90K
K18
1 ASIN in Top 10
13.5%
Units
50K
Revenue
$1.4M
Avg. price
$29.00
B09HR5KSR8
$29.00·★4.3·31.4K revsK18 Leave-In Molecular Repair Hair Mask, Patented, Lasting Repair For Dry, Frizzy, Damaged Hair, Reverse Damage In 4 Minutes From Bleach, Color, Chemical Services + Heat
Units sold50K
Marc Anthony
1 ASIN in Top 10
10.8%
Units
40K
Revenue
$330K
Avg. price
$7.67
B076FHJ3K5
$7.67·★4.5·71.4K revsMarc Anthony Grow Long, Detangling Leave-In Hair Conditioner Spray | Anti-Frizz Anti-Breakage Hair Care for Dry Damaged Hair & Split Ends - Biotin, Vitamin E, Caffeine & Ginseng - Sulfate Free
Units sold40K
Trending K18 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, 3 ASINs forced its way in: B01I2ZQJSG booked 30K units at $6.99, with ▲ 200.0% MoM change.
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.
B01I2ZQJSG
Elizavecca cer-100 collagen coating hair protein treatment 100ml
Price
$6.99
Rating
4.4
Reviews
64.4K
Latest month sales
B08T2WP81T
Pantene Miracle Rescue 10in1 Multitasking Spray - Heat Protection, Detangles, Repairs Damaged, Dry Hair, Improves Shine, Leave-In Conditioning Treatment with Keratin and Pro-Vitamin B5, 5.7 oz
Price
$12.84
Rating
4.5
Reviews
3.1K
Latest month sales
B00I32AN4K
Arvazallia Hydrating Argan Oil Hair Mask & Deep Conditioner For Dry Hair | Repairs, Moisturizes, Detangles Damaged or Dry hair Leaving it Soft, Silky, and Easier to Manage. Sulfate Free 8.45oz Jar
Unlock to view ASIN details and product titles
Price
$14.99
Rating
4.5
Reviews
66.6K
Latest month sales
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