---
title: "Acid Controller — $8.9M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/acid-controller"
last_updated: "2026-08-09T06:09:30.221Z"
locale: en
meta:
description: "Niche score 56/100 · $8.9M/yr market · 2.5M searches/yr · $15.05 avg price. Clears our launch bar. Data updated Jul 2026."
"og:description": "Niche score 56/100 · $8.9M/yr market · 2.5M searches/yr · $15.05 avg price. Clears our launch bar. Data updated Jul 2026."
"og:title": "Acid Controller — $8.9M/yr Amazon US Niche (2026) - Flapen"
---
# **acid controller**
**Launch it**
A $8.9M/yr market growing +37.4% this quarter with returns at 0.0% — clears our launch bar.
Market size 100Growth 61Conversion 100Competition 20Returns 100Price range 53Avg price 75Brand share 0Review moat 18Quality gap 14
**Market size**
**Incredible****$8.9M**
$8.9M/yr · 2.5M searches
**Conversion**
**Incredible****24.1%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$15.05**
avg listing price — sweet spot $15–$100
**Growth**
**Good****+37.4%**
90-day search growth — must beat 0% to launch
**Price range**
**Good****$5.21–$26.20**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Bad****76%**
top-5 click share — a locked-up shelf
**Review moat**
**Bad****16,306.19**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.8★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, acid controller is a $8.9M/yr Amazon United States market (2.5M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Mar–Apr–May–Jun. Verdict: Launch it — 56/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **acid controller market data**
- **Units sold / yr**
- **600K–800K**
- avg 30,000–40,000/product
- **Revenue / yr**
- **$9.0M–$12.0M**
- units × avg price
- **Conversion rate**
- **24.1%**
- **Avg BSR**
- **#76**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **88%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **84 months**
- **Avg seller age**
- **153 days**
## **Competition & brand share**
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **—flat
**Sellers**
**129**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**76%**
Top 20: 100%
**Open market**
**0%**
- Pepcid63% - Amazon Basic Care33% - HealthA2Z2% - Glenmark Therapeutics2%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +37.4% search growth over the last 90 days.
100K60KSpike '24Spike '25Prime Day '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Mar, Apr, May, Jun · busiest ÷ quietest = 158.6×
[**Open Trend **](https://flapen.com/research/us/health-household/acid-controller/trend)
## **Top acid controller search terms**
- **pepcid**1.2M/yr+30.2%21.4% conv. - **pepcid ac**420K/yr+166.0%22.1% conv. - **pepcid ac maximum strength**594K/yr-5.5%23.6% conv. - **pepcid 20mg**75K/yr+1.1%21.6% conv. - **pepsid**43K/yr+13.8%19.8% conv. - **pepcid ac 20 mg**34K/yr-1.0%21.3% conv. - **peocid**13K/yr+52.0%19.7% conv. - **acid controller**12K/yr+14.8%8.6% conv. - **generic pepcid**8K/yr+65.6%9.7% conv. - **pepcid maximum strength**10K/yr+21.8%15.2% conv. [**All search terms **](https://flapen.com/research/us/health-household/acid-controller/search-terms)
## **Top acid controller 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%10%$894K20%$1.8M30%$2.7M40%$3.6M1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 16 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Amazon Basic Care Maximum Strength Famotidine Tablets 20 mg Acid Reducer for Heartburn Relief Prevents & Relieves Acid Indigestion Heartburn Medicine 12 Hour Protection 200 Count**Amazon Basic Care**$10.31**4.7★54,405 rev](https://www.amazon.com/dp/B074F18H4B) [2**Pepcid AC Maximum Strength Heartburn Relief Tablets OTC Medicine Prevents & Relieves Heartburn & Acid Reflux Due to Acid Indigestion 20mg Famotidine Acid Reducer Fast-Acting 25 ct**Pepcid**$11.00**4.8★21,683 rev](https://www.amazon.com/dp/B005IHTSYE) [3**Pepcid AC Maximum Strength Heartburn Relief Tablets Famotidine 20mg Acid Reducer Fast-Acting Antacid Helps Prevent & Relieve Heartburn from Acid Indigestion Value 75 ct Bottle**Pepcid**$23.51**4.8★21,683 rev](https://www.amazon.com/dp/B08V8BL7WF) [4**Pepcid AC Original Strength Heartburn Relief Tablets OTC Medicine Prevents & Relieves Heartburn & Acid Reflux Due to Acid Indigestion 10mg Famotidine Acid Reducer Fast-Acting 90 ct**Pepcid**$21.65**4.8★6,293 rev](https://www.amazon.com/dp/B0000537NI) [5**Amazon Basic Care Maximum Strength Famotidine Tablets 20 mg Acid Reducer for Heartburn Relief Prevents & Relieves Acid Indigestion Heartburn Medicine 50 Count**Amazon Basic Care**$5.21**4.7★54,405 rev](https://www.amazon.com/dp/B08ZF5KVCN)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Pepcid Complete Acid Reducer + Antacid Chewable Tablets 10mg Famotidine 800mg Calcium Carbonate & 165mg Magnesium Hydroxide per Heartburn Medicine Tablet Antacid Chews Berry Flavored 70 ct**Pepcid**$26.20**15,231 rev1y ago](https://www.amazon.com/dp/B0FFTPKMZB) [**Amazon Basic Care Maximum Strength Famotidine Tablets 20 mg Acid Reducer for Heartburn Relief Prevents & Relieves Acid Indigestion Heartburn Medicine 12 Hour Protection 200 Count**Amazon Basic Care**$10.31**54,405 rev1y ago](https://www.amazon.com/dp/B074F18H4B) [**Pepcid AC Maximum Strength Heartburn Relief Tablets OTC Medicine Prevents & Relieves Heartburn & Acid Reflux Due to Acid Indigestion 20mg Famotidine Acid Reducer ICY Cool Mint 40 ct**Pepcid**$15.37**886 rev2y ago](https://www.amazon.com/dp/B0CV84FQ9H) [**HealthA2Z Acid Reducer | Famotidine 20mg | Maximum Strength | Relief from Heart Burn Due to Acid Indigestion (225 Tablets (Pack of 1))**HealthA2Z**$8.81**4,063 rev2y ago](https://www.amazon.com/dp/B0CLF1QNYP) [**Glenmark Therapeutics Maximum Strength Famotidine Tablets 20 mg Acid Reducer for Heartburn Relief 200 Count**Glenmark Therapeutics**$8.41**11,102 rev4y ago](https://www.amazon.com/dp/B098BBJRC6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Amazon Basic Care Maximum Strength Famotidine Tablets 20 mg Acid Reducer for Heartburn Relief Prevents & Relieves Acid Indigestion Heartburn Medicine 50 Count**Amazon Basic Care**$5.21**4.7★**▲ 109%**](https://www.amazon.com/dp/B08ZF5KVCN) [**Pepcid AC Maximum Strength Heartburn Relief Tablets Famotidine 20mg Acid Reducer Fast-Acting Antacid Helps Prevent & Relieve Heartburn from Acid Indigestion Value 75 ct Bottle**Pepcid**$23.51**4.8★**▲ 44%**](https://www.amazon.com/dp/B08V8BL7WF) [**Pepcid Complete Acid Reducer + Antacid for Acid Reflux 10mg Famotidine 800mg Calcium Carbonate & 165mg Magnesium Hydroxide per Heartburn Medicine Tablet Antacid Chews Berry 50 ct**Pepcid**$19.16**4.8★**— 7%**](https://www.amazon.com/dp/B00006J3G2) [**Pepcid Complete Acid Reducer + Antacid for Acid Reflux 10mg Famotidine 800mg Calcium Carbonate & 165mg Magnesium Hydroxide per Heartburn Medicine Tablet Antacid Chews Mint 25 ct**Pepcid**$11.27**4.8★**— 4%**](https://www.amazon.com/dp/B010VDVQJE) [**HealthA2Z Acid Reducer | Famotidine 20mg | Maximum Strength | Relief from Heart Burn Due to Acid Indigestion (225 Tablets (Pack of 1))**HealthA2Z**$8.81**4.7★**— 3%**](https://www.amazon.com/dp/B0CLF1QNYP)
**~~View all trending →~~**
## **What buyers say about acid controller**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**18%
*“Great deal”*
**Efficiency**14%
*“Works well”*
**Quality-Overall**12%
*“How about this so many times and the quality is wonderful wonderful and very consistent”*
**Advertised Vs Actual Product**10%
*“Accurate description”*
**Heart Health**8%
*“It is good for a surprise heart burn”*
**Acid Regulator/Stomach Ache Relief**5%
*“No tummy ache for me”*
**Regulates Digestion**3%
*“Excellent acid control”*
**Taste-Overall**3%
*“Great product, no nasty taste, easy to swallow”*
**Dosage**3%
*“Purchased several and have been very happy with medication”*
**Ease Of Chewing/Swallowing**2%
*“Very effective and easy to chew”*
### **What buyers complain about **
**Functionality-Overall**11%
*“DOESN'T WORK”*
**Dosage**7%
*“Seems low dosage”*
**Value For Money**7%
*“Huge price increase”*
**Heart Health**6%
*“then I experienced severe heartburn 4 days in a row”*
**Size-Overall**6%
*“They're tiny little square shaped”*
**Regulates Digestion**5%
*“this does not help my acid reflux at all”*
**Taste-Overall**5%
*“Taste is gross”*
**Quality-Overall**4%
*“not quality”*
**Strength**3%
*“Doesn't seem maximum strength”*
**Allergies**2%
*“when I get heartburn”*
### **Top return reasons **
**Ease Of Use**50%
**Ingredients-Overall**50%
## **Common questions**
- **Is acid controller profitable to sell on Amazon United States?**
- The niche generates $8.9M/yr across 16 tracked products. 90-day search growth is +37.4%. Flapen's verdict: Launch it (56/100).
- **How competitive is the acid controller niche?**
- 4 brands and 129 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in acid controller?**
- Top complaints mined from reviews: Functionality-Overall, Dosage, Value For Money. The return rate is 0.0%.
- **When does demand for acid controller peak?**
- Demand peaks in Jan–Feb–Mar–Apr–May–Jun; the busiest month runs 158.6× the quietest.
- **What does it cost to enter the acid controller niche?**
- Listings span $5.21–$26.20; the average listing price is $15.05 (sweet spot $15–$100). The average incumbent carries 16,306 reviews — the moat a new listing must climb.
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