---
title: "Polyglutamic Acid — $190K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/beauty-personal-care/polyglutamic-acid"
last_updated: "2026-08-10T23:07:53.019Z"
locale: en
meta:
description: "Niche score 45/100 · $190K/yr market · 75K searches/yr · $18.95 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 45/100 · $190K/yr market · 75K searches/yr · $18.95 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Polyglutamic Acid — $190K/yr Amazon US Niche (2026) - Flapen"
---
# **polyglutamic acid**
**Skip it**
A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Market size 38Growth 22Conversion 96Competition 0Returns 76Price range 86Avg price 85Brand share 0Review moat 69Quality gap 70
**Conversion**
**Incredible****13.4%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Great****$13.62–$25.97**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$18.95**
avg listing price — sweet spot $15–$100
**Returns**
**Great****2.0%**
return rate — above 5% kills the launch gate
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****750.25**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Okay****$190K**
$190K/yr · 75K searches
**Growth**
**Bad****-6.9%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****100%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, polyglutamic acid is a $190K/yr Amazon United States market (75K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 45/100.
Data updated Jul 16, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **polyglutamic acid market data**
- **Units sold / yr**
- **6K–8K**
- avg 1,500–2,000/product
- **Revenue / yr**
- **$114K–$152K**
- units × avg price
- **Conversion rate**
- **13.4%**
- **Avg BSR**
- **#270**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **53 months**
- **Avg seller age**
- **126 days**
## **Competition & brand share**
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**2 **▼falling
**Sellers**
**6**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**100%**
Top 20: 100%
**Open market**
**0%**
- Prequel88% - The INKEY List12% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -6.9% search growth over the last 90 days.
4K3KBlack Friday '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 2.2×
[**Open Trend **](https://flapen.com/research/us/beauty-personal-care/polyglutamic-acid/trend)
## **Top polyglutamic acid search terms**
- **prequel multi quench serum**12K/yr+23.3%15.9% conv. - **prequel serum**13K/yr-0.7%10.0% conv. - **polyglutamic acid**16K/yr-21.4%2.2% conv. - **polyglutamic acid serum**12K/yr-20.6%4.3% conv. - **prequel hydrating serum**8K/yr-22.8%14.7% conv. - **prequel multi-quench plumping hydration serum**3K/yr+110.9%14.7% conv. - **prequel multi quench**6K/yr-30.6%13.1% conv. - **prequel hyaluronic acid**3K/yr-22.3%8.4% conv. - **polyglutamic acid serum for face**2K/yr-4.9%2.7% conv. [**All search terms **](https://flapen.com/research/us/beauty-personal-care/polyglutamic-acid/search-terms)
## **Top polyglutamic acid 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%20%$38K40%$76K60%$114K80%$152K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 4 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Prequel Skin Multi-Quench Plumping Hydration Serum for Face. Intensive Hydrating Facial Serum for Women with PGA Complex and Moisture-Binders. Deep Moisturizing for Dry and Sensitive Skin 1.7oz**Prequel**$25.97**4.6★813 rev](https://www.amazon.com/dp/B0D9MR13R4) [2**The INKEY List Polyglutamic Acid Serum Face Serum to Moisturize Dry Skin Reduce Fine Lines and Boost Radiance 1.0 fl oz**The INKEY List**$13.62**4.3★1,358 rev](https://www.amazon.com/dp/B09N9ZNP9M) [3**Prequel Skin Multi-Quench Hydration Mist Moisturizing Face Spray with Plumping PGA Complex Glycerin Aloe & More Hydrating Facial Spray with Niacinamide for Smoother Skin Fine Mist Humectant**Prequel**$17.13**4.2★232 rev](https://www.amazon.com/dp/B0FY39GVSQ) [4**Prequel Skin Redness Reform Calming Serum for Face. Advanced Clinical Optical Corrector for Redness and Discomfort. Soothing Face Serum with Oat Extract for Sensitive Skin. 1oz Pump**Prequel**$19.10**4.2★598 rev](https://www.amazon.com/dp/B0D4NK92MP)
### **Newest**
by launch date
[**Prequel Skin Multi-Quench Hydration Mist Moisturizing Face Spray with Plumping PGA Complex Glycerin Aloe & More Hydrating Facial Spray with Niacinamide for Smoother Skin Fine Mist Humectant**Prequel**$17.13**232 rev8mo ago](https://www.amazon.com/dp/B0FY39GVSQ) [**Prequel Skin Multi-Quench Plumping Hydration Serum for Face. Intensive Hydrating Facial Serum for Women with PGA Complex and Moisture-Binders. Deep Moisturizing for Dry and Sensitive Skin 1.7oz**Prequel**$25.97**813 rev1y ago](https://www.amazon.com/dp/B0D9MR13R4) [**Prequel Skin Redness Reform Calming Serum for Face. Advanced Clinical Optical Corrector for Redness and Discomfort. Soothing Face Serum with Oat Extract for Sensitive Skin. 1oz Pump**Prequel**$19.10**598 rev2y ago](https://www.amazon.com/dp/B0D4NK92MP) [**The INKEY List Polyglutamic Acid Serum Face Serum to Moisturize Dry Skin Reduce Fine Lines and Boost Radiance 1.0 fl oz**The INKEY List**$13.62**1,358 rev3y ago](https://www.amazon.com/dp/B09N9ZNP9M)
### **Trending**
90-day click momentum
[**Prequel Skin Redness Reform Calming Serum for Face. Advanced Clinical Optical Corrector for Redness and Discomfort. Soothing Face Serum with Oat Extract for Sensitive Skin. 1oz Pump**Prequel**$19.10**4.2★**— 8%**](https://www.amazon.com/dp/B0D4NK92MP) [**Prequel Skin Multi-Quench Plumping Hydration Serum for Face. Intensive Hydrating Facial Serum for Women with PGA Complex and Moisture-Binders. Deep Moisturizing for Dry and Sensitive Skin 1.7oz**Prequel**$25.97**4.6★**— 2%**](https://www.amazon.com/dp/B0D9MR13R4) [**Prequel Skin Multi-Quench Hydration Mist Moisturizing Face Spray with Plumping PGA Complex Glycerin Aloe & More Hydrating Facial Spray with Niacinamide for Smoother Skin Fine Mist Humectant**Prequel**$17.13**4.2★**— 2%**](https://www.amazon.com/dp/B0FY39GVSQ) [**The INKEY List Polyglutamic Acid Serum Face Serum to Moisturize Dry Skin Reduce Fine Lines and Boost Radiance 1.0 fl oz**The INKEY List**$13.62**4.3★**▼ 11%**](https://www.amazon.com/dp/B09N9ZNP9M)
## **What buyers say about polyglutamic acid**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Moist/Dry**30%
*“Super hydrating”*
**Suitability Combination Skin**9%
*“I find it to be very effective for my skin”*
**Suitability Dry Skin**7%
*“I have sensitive, dry and red skin and this serum transforms it to something hydrated, glowy, and happy”*
**Value For Money**6%
*“great price as well”*
**Quality-Overall**5%
*“Great product”*
**Soft Feel**3%
*“Skin softener. Feels nice”*
**Allergies**3%
*“I havent gotten any irritation”*
**Brightness/Shine/Glow**3%
*“beautiful glow”*
**Absorbency**3%
*“Good product, great absorption”*
**Smell**2%
*“Its fragrance free”*
### **What buyers complain about **
**Allergies**13%
*“Skin reaction”*
**Smell**10%
*“had a weird smell”*
**Moist/Dry**10%
*“Not super hydrating”*
**Functionality-Overall**7%
*“Doesn't work”*
**Adhesion/Stickiness**6%
*“almost as if it was attracting dirt on account of the stickiness”*
**Skin Health**6%
*“My skin burns”*
**Sensitivity-Overall**5%
*“feel like a burning sensation”*
**Suitability Dry Skin**3%
*“I don't know that it helped moisturize my skin at all”*
**Symptom Reduction**3%
*“did not see much improvement of redness after 6 weeks”*
**Value For Money**2%
*“The price in my opinion though is a little high”*
### **Top return reasons **
**Functionality-Overall**16%
**Advertised Vs Actual Product**11%
**Smell**8%
**Moist/Dry**7%
**Adhesion/Stickiness**7%
**Skin Health**5%
**Motor Power**5%
**Product Condition**5%
**Value For Money**4%
**Leak-Proof**4%
## **Common questions**
- **Is polyglutamic acid profitable to sell on Amazon United States?**
- The niche generates $190K/yr across 4 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -6.9%. Flapen's verdict: Skip it (45/100).
- **How competitive is the polyglutamic acid niche?**
- 2 brands and 6 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in polyglutamic acid?**
- Top complaints mined from reviews: Allergies, Smell, Moist/Dry. The return rate is 2.0%.
- **When does demand for polyglutamic acid peak?**
- Demand is steady year-round — the busiest month runs 2.2× the quietest.
- **What does it cost to enter the polyglutamic acid niche?**
- Listings span $13.62–$25.97; the average listing price is $18.95 (sweet spot $15–$100). The average incumbent carries 750 reviews — the moat a new listing must climb.
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