---
title: "Stool Hardener — $2.3M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/stool-hardener"
last_updated: "2026-08-11T06:00:09.938Z"
locale: en
meta:
description: "Niche score 44/100 · $2.3M/yr market · 1.5M searches/yr · $9.50 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · $2.3M/yr market · 1.5M searches/yr · $9.50 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Stool Hardener — $2.3M/yr Amazon US Niche (2026) - Flapen"
---
# **stool hardener**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 95Growth 31Conversion 98Competition 8Returns 100Price range 0Avg price 29Brand share 0Review moat 21Quality gap 17
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****16.5%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Incredible****$2.3M**
$2.3M/yr · 1.5M searches
**Growth**
**Okay****+4.9%**
90-day search growth — must beat 0% to launch
**Avg price**
**Okay****$9.50**
avg listing price — sweet spot $15–$100
**Review moat**
**Bad****12,274.63**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****91%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Price range**
**Bad****$3.58–$13.56**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United States niche tracking, stool hardener is a $2.3M/yr Amazon United States market (1.5M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in May–Jun. Verdict: Skip it — 44/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **stool hardener market data**
- **Units sold / yr**
- **300K–400K**
- avg 50,000–60,000/product
- **Revenue / yr**
- **$2.9M–$3.8M**
- units × avg price
- **Conversion rate**
- **16.5%**
- **Avg BSR**
- **#36**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **76 months**
- **Avg seller age**
- **143 days**
## **Competition & brand share**
The top 5 products capture 91% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **▼falling
**Sellers**
**68**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**91%**
Top 20: 100%
**Open market**
**0%**
- Amazon Basic Care74% - Imodium20% - Kaopectate6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +4.9% search growth over the last 90 days.
40K30KSpike '25 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun · busiest ÷ quietest = 2.3×
[**Open Trend **](https://flapen.com/research/us/health-household/stool-hardener/trend)
## **Top stool hardener search terms**
- **anti diarrhea pills**574K/yr-2.8%16.6% conv. - **loperamide**241K/yr+11.4%12.8% conv. - **diarrhea medication for adults**155K/yr+13.3%12.4% conv. - **anti diarrhea**78K/yr+9.5%10.4% conv. - **diarrhea medicine**52K/yr+22.1%9.7% conv. - **antidiarrheal pills**60K/yr+5.1%13.8% conv. - **anti diarrhea medicine**31K/yr+27.9%9.8% conv. - **diarrhea**43K/yr-23.3%3.8% conv. - **loperamide anti-diarrhea pills**15K/yr+58.6%15.0% conv. - **antidiarrheal**25K/yr+44.0%8.6% conv. [**All search terms **](https://flapen.com/research/us/health-household/stool-hardener/search-terms)
## **Top stool hardener products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%15%$345K30%$690K45%$1.0M60%$1.4M1K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 8 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Amazon Basic Care Loperamide Hydrochloride Tablets 2 mg Anti-Diarrheal 24 Count (Pack of 1)**Amazon Basic Care**$3.58**4.7★23,540 rev](https://www.amazon.com/dp/B082DQG6CZ) [2**Amazon Basic Care Loperamide Hcl 2 Mg Softgels Anti-Diarrheal Easy to Swallow Controls Symptoms of Travelers Diarrhea 24 Count**Amazon Basic Care**$7.57**4.7★6,748 rev](https://www.amazon.com/dp/B0859YXK15) [3**Imodium A-D Diarrhea Relief Caplets with Loperamide HCl Anti Diarrheal Medicine to Help Control Symptoms of Diarrhea Due to Acute Travelers Diarrhea 24 Count**Imodium**$10.84**4.8★20,963 rev](https://www.amazon.com/dp/B01ASIAW4W) [4**Imodium A-D Anti-Diarrheal Softgels with 2mg Loperamide Hydrochloride for Fast Acting Diarrhea Symptom Relief On the Go in Travel Size Softgels for Adults 12+ 24 Ct**Imodium**$13.05**4.8★16,431 rev](https://www.amazon.com/dp/B01HI7W5GO) [5**Amazon Basic Care Loperamide Hydrochloride 2 mg and Simethicone 125 mg Tablets Multi-Symptom Relief Anti-Diarrheal Bloating and Cramps Gas Relief 24 Count**Amazon Basic Care**$8.36**4.6★4,096 rev](https://www.amazon.com/dp/B0828M38WK)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Kaopectate Multi-Symptom Anti-Diarrheal & Upset Stomach Reliever 84 Caplets Anti Diarrhea Caplets**Kaopectate**$12.44**4,883 rev5mo ago](https://www.amazon.com/dp/B0FJH76SJJ) [**Amazon Basic Care Loperamide Hcl 2 Mg Softgels Anti-Diarrheal Easy to Swallow Controls Symptoms of Travelers Diarrhea 24 Count**Amazon Basic Care**$7.57**6,748 rev2y ago](https://www.amazon.com/dp/B0859YXK15) [**Kaopectate Multi-Symptom Anti-Diarrheal & Upset Stomach Reliever 42 Caplets Anti Diarrhea Caplets**Kaopectate**$6.56**4,883 rev5y ago](https://www.amazon.com/dp/B08YBB29SM) [**Amazon Basic Care Loperamide Hydrochloride 2 mg and Simethicone 125 mg Tablets Multi-Symptom Relief Anti-Diarrheal Bloating and Cramps Gas Relief 24 Count**Amazon Basic Care**$8.36**4,096 rev6y ago](https://www.amazon.com/dp/B0828M38WK) [**Amazon Basic Care Loperamide Hydrochloride Tablets 2 mg Anti-Diarrheal 24 Count (Pack of 1)**Amazon Basic Care**$3.58**23,540 rev6y ago](https://www.amazon.com/dp/B082DQG6CZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Kaopectate Multi-Symptom Anti-Diarrheal & Upset Stomach Reliever 84 Caplets Anti Diarrhea Caplets**Kaopectate**$12.44**4.7★**▲ 144%**](https://www.amazon.com/dp/B0FJH76SJJ) [**Imodium Multi-Symptom Anti-Diarrheal Caplets with 2mg Loperamide Hydrochloride and Simethicone for Fast Acting Relief of Diarrhea Gas Cramps Bloating in Travel Size Caplets 24 Ct**Imodium**$13.56**4.8★**▲ 71%**](https://www.amazon.com/dp/B084K8F821) [**Imodium A-D Diarrhea Relief Caplets with Loperamide HCl Anti Diarrheal Medicine to Help Control Symptoms of Diarrhea Due to Acute Travelers Diarrhea 24 Count**Imodium**$10.84**4.8★**▲ 29%**](https://www.amazon.com/dp/B01ASIAW4W) [**Imodium A-D Anti-Diarrheal Softgels with 2mg Loperamide Hydrochloride for Fast Acting Diarrhea Symptom Relief On the Go in Travel Size Softgels for Adults 12+ 24 Ct**Imodium**$13.05**4.8★**— 4%**](https://www.amazon.com/dp/B01HI7W5GO) [**Amazon Basic Care Loperamide Hydrochloride Tablets 2 mg Anti-Diarrheal 24 Count (Pack of 1)**Amazon Basic Care**$3.58**4.7★**— 0%**](https://www.amazon.com/dp/B082DQG6CZ)
**~~View all trending →~~**
## **What buyers say about stool hardener**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Efficiency**19%
*“Works perfectly”*
**Advertised Vs Actual Product**17%
*“As advertised”*
**Value For Money**14%
*“not expensive”*
**Quality-Overall**9%
*“As good as the brand name”*
**Acid Regulator/Stomach Ache Relief**6%
*“Great for stomach discomfort”*
**Ease Of Use**5%
*“Easier to open”*
**Magnesium**3%
*“Imodium works very well”*
**Regulates Digestion**2%
*“Good for stomach problems”*
**Dosage**2%
*“Dosage and Effectiveness”*
**Ease Of Chewing/Swallowing**2%
*“I never have issues swallowing pills so it's easy for me”*
### **What buyers complain about **
**Ease Of Use**24%
*“Hard to Open”*
**Functionality-Overall**12%
*“Product not uszble”*
**Ingredients-Overall**5%
*“keopectate has a salicylate ingredient that I did not know it had”*
**Dosage**4%
*“Hard to take out pills”*
**Value For Money**4%
*“Over priced”*
**Side Effects**4%
*“BUT it may react with other medications taken in the same time period in a negative way”*
**Taste-Overall**3%
*“I found no taste”*
**Size-Overall**3%
*“the tablet is much larger”*
**Color**2%
*“though it does turn something a dark color”*
**Quality-Overall**2%
*“Cheaper”*
## **Common questions**
- **Is stool hardener profitable to sell on Amazon United States?**
- The niche generates $2.3M/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +4.9%. Flapen's verdict: Skip it (44/100).
- **How competitive is the stool hardener niche?**
- 3 brands and 68 sellers compete. The top 5 products take 91% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in stool hardener?**
- Top complaints mined from reviews: Ease Of Use, Functionality-Overall, Ingredients-Overall. The return rate is 0.0%.
- **When does demand for stool hardener peak?**
- Demand peaks in May–Jun; the busiest month runs 2.3× the quietest.
- **What does it cost to enter the stool hardener niche?**
- Listings span $3.58–$13.56; the average listing price is $9.50 (sweet spot $15–$100). The average incumbent carries 12,275 reviews — the moat a new listing must climb.
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