---
title: "Fiber Supplement — $15.3M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/fiber-supplement"
last_updated: "2026-08-09T07:30:18.877Z"
locale: en
meta:
description: "Niche score 66/100 · $15.3M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 66/100 · $15.3M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Fiber Supplement — $15.3M/yr Amazon US Niche (2026) - Flapen"
---
# **fiber supplement**
**Worth a look**
Shows a $15.3M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 100Growth 21Conversion 81Competition 73Returns 100Price range 86Avg price 90Brand share 51Review moat 22Quality gap 37
**Market size**
**Incredible****$15.3M**
$15.3M/yr · 8.5M searches
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$21.06**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.58–$58.04**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****8.6%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Good****41%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****74%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****10,151.49**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-7.2%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, fiber supplement is a $15.3M/yr Amazon United States market (8.5M searches/yr). The top 5 brands hold 74% of demand. Verdict: Worth a look — 66/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fiber supplement market data**
- **Units sold / yr**
- **600K–800K**
- avg 20,000–25,000/product
- **Revenue / yr**
- **$12.6M–$16.8M**
- units × avg price
- **Conversion rate**
- **8.6%**
- **Avg BSR**
- **#63**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **84%**
- **Out of stock**
- **0.3%**
- **Avg brand age**
- **68 months**
- **Avg seller age**
- **136 days**
## **Competition & brand share**
The top 5 products take 41% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**23 **▲rising
**Sellers**
**212**
**Top-5 brand share**
**74%**
Top 20: 98%
**Top-5 click share**
**41%**
Top 20: 84%
**Open market**
**22%**
- Metamucil35% - NOW Foods14% - Benefiber13% - Physician's CHOICE7% - Amazon Basics5% - MiraLAX3%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -7.2% search growth over the last 90 days.
225K175KSpike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/us/health-household/fiber-supplement/trend)
## **Top fiber supplement search terms**
- **fiber supplement**2.9M/yr-21.9%6.5% conv. - **fiber**2.2M/yr-6.0%5.5% conv. - **fiber powder**697K/yr+1.6%5.3% conv. - **metamucil capsule**429K/yr+4.0%15.9% conv. - **fiber supplement for women**350K/yr-5.3%5.4% conv. - **fiber pills**320K/yr+4.5%8.4% conv. - **fiber capsules**226K/yr-2.1%8.8% conv. - **daily fiber supplement**93K/yr+360.1%1.1% conv. - **soluble fiber**194K/yr-17.0%4.2% conv. - **fibra para el estreimiento**158K/yr+9.0%1.8% conv. [**All search terms **](https://flapen.com/research/us/health-household/fiber-supplement/search-terms)
## **Top fiber supplement 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%4%$613K8%$1.2M12%$1.8M16%$2.5M1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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***Metamucil**$32.99**4.6★26,964 rev](https://www.amazon.com/dp/B001TH7K0G) [2**NOW Foods Supplements Psyllium Husk Caps 500 mg Non-GMO Project Verified Natural Soluble Fiber Intestinal Health* 200 Veg Capsules**NOW Foods**$10.49**4.6★31,631 rev](https://www.amazon.com/dp/B005P0XUAM) [3**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**Metamucil**$33.71**4.7★35,140 rev](https://www.amazon.com/dp/B003CT2YQY) [4**Benefiber Daily Prebiotic GLP-1 Friendly Fiber Supplement Powder for Digestive Health Unflavored - 250 Teaspoons (17.6 Ounces)**Benefiber**$21.93**4.7★9,314 rev](https://www.amazon.com/dp/B00CX3ASFE) [5**Metamucil Fiber Gummies for Adults No Sugar Added Orange Flavor 5g Prebiotic Plant Based Fiber Supplement Blend 120 Count**Metamucil**$23.70**4.6★17,254 rev](https://www.amazon.com/dp/B0BDP24LP4)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Physicians CHOICE Fiber Gummies for GLP-1 Support - No Sugar Added & Vegan - Raspberry Lemon - Natural Chicory Root Prebiotic Fiber Gummy - Digestive Health & Regularity for Women & Men - 60CT**Physician's CHOICE**$15.35**1,700 rev8mo ago](https://www.amazon.com/dp/B0FYZ9QQ9Z) [**Physicians CHOICE Easy Mix Fiber for GLP-1 Support - No Grit & Sugar Free - Daily Prebiotic Soluble Fiber Powder Supplement - Digestive Health & Regularity - for Women and Men - Unflavored - 7.1oz**Physician's CHOICE**$21.53**1,689 rev9mo ago](https://www.amazon.com/dp/B0FTTGT6M7) [**Metamucil 3-in-1 Fiber Capsules Daily Psyllium Husk Fiber Supplement for Digestive Health Plant Based Fiber Supplement 340 Capsules (Pack of 1)**Metamucil**$58.04**131 rev1y ago](https://www.amazon.com/dp/B0FJ2VC7F1) [**Metamucil Fiber Supplement Unflavored Clear Mixing Powder No Grit No Sugar Added Plant Based Prebiotic Fiber Supplement Blend for Daily Digestive Health 75 teaspoons**Metamucil**$23.57**2,401 rev2y ago](https://www.amazon.com/dp/B0CZSFWZMH) [**Metamucil Fiber Gummies for Adults with Probiotics for Bloating Relief No Sugar Added Strawberry Kiwi BlackBerry Flavors 5g Prebiotic Plant Based Fiber Supplement Blend 90 Count**Metamucil**$31.57**3,452 rev2y ago](https://www.amazon.com/dp/B0CQF4PBGC)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Physicians CHOICE Fiber Gummies for GLP-1 Support - No Sugar Added & Vegan - Raspberry Lemon - Natural Chicory Root Prebiotic Fiber Gummy - Digestive Health & Regularity for Women & Men - 60CT**Physician's CHOICE**$15.35**4.4★**▲ 126%**](https://www.amazon.com/dp/B0FYZ9QQ9Z) [**Metamucil 3-in-1 Fiber Capsules Daily Psyllium Husk Fiber Supplement for Digestive Health Plant Based Fiber Supplement 340 Capsules (Pack of 1)**Metamucil**$58.04**4.9★**▲ 104%**](https://www.amazon.com/dp/B0FJ2VC7F1) [**Physicians CHOICE Easy Mix Fiber for GLP-1 Support - No Grit & Sugar Free - Daily Prebiotic Soluble Fiber Powder Supplement - Digestive Health & Regularity - for Women and Men - Unflavored - 7.1oz**Physician's CHOICE**$21.53**4.4★**▲ 74%**](https://www.amazon.com/dp/B0FTTGT6M7) [**NOW Foods Supplements Psyllium Husk Caps 500 mg Non-GMO Project Verified Natural Soluble Fiber Intestinal Health* 500 Veg Capsules**NOW Foods**$19.99**4.6★**▲ 43%**](https://www.amazon.com/dp/B0013OW2KS) [**Nutricost Psyllium Husk 1500mg 500 Capsules Gluten Free GMO-Free**Nutricost**$19.55**4.5★**▲ 29%**](https://www.amazon.com/dp/B01CTFZFE4)
**~~View all trending →~~**
## **What buyers say about fiber supplement**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Taste-Overall**16%
*“no nasty taste”*
**Quality-Overall**10%
*“The capsules are a good quality”*
**Efficiency**8%
*“Works Well”*
**Nutritional Content**6%
*“Good supplement”*
**Regulates Digestion**6%
*“Easy on your stomach”*
**Value For Money**5%
*“Fair price”*
**Advertised Vs Actual Product**5%
*“As Described”*
**Solubility**5%
*“Dissolves easily”*
**Ease Of Use**4%
*“Easy to get down”*
**Flavor**4%
*“Good orange flavor”*
### **What buyers complain about **
**Taste-Overall**12%
*“Disgusting taste”*
**Functionality-Overall**11%
*“No result”*
**Value For Money**5%
*“A little expensive”*
**Ease Of Chewing/Swallowing**4%
*“Difficult to chew”*
**Dosage**4%
*“The recommended dosage was way too much for me”*
**Nutritional Content**3%
*“I cant believe I didnt double check the nutrition label”*
**Regulates Digestion**3%
*“Not sure how much they help with digestion”*
**Acid Regulator/Stomach Ache Relief**3%
*“Major bloating”*
**Solubility**3%
*“Dissolving issues”*
**Flavor**3%
*“Strange flavor”*
### **Top return reasons **
**Functionality-Overall**16%
**Dosage**12%
**Advertised Vs Actual Product**11%
**Taste-Overall**7%
**Value For Money**6%
**Ingredients-Overall**5%
**Ease Of Chewing/Swallowing**4%
**Regulates Digestion**4%
**Vitamin**4%
**Acid Regulator/Stomach Ache Relief**3%
## **Common questions**
- **Is fiber supplement profitable to sell on Amazon United States?**
- The niche generates $15.3M/yr across 37 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is -7.2%. Flapen's verdict: Worth a look (66/100).
- **How competitive is the fiber supplement niche?**
- 23 brands and 212 sellers compete. The top 5 products take 41% of clicks and top 5 brands hold 74% of demand.
- **What do buyers complain about in fiber supplement?**
- Top complaints mined from reviews: Taste-Overall, Functionality-Overall, Value For Money. The return rate is 0.0%.
- **When does demand for fiber supplement peak?**
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- **What does it cost to enter the fiber supplement niche?**
- Listings span $9.58–$58.04; the average listing price is $21.06 (sweet spot $15–$100). The average incumbent carries 10,151 reviews — the moat a new listing must climb.
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