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.

polyglutamic acid

Skip it

A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.

Conversion

Incredible13.4%

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

Great2.0%

return rate — above 5% kills the launch gate

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Review moat

Good750.25

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

Bad100%

top-5 click share — a locked-up shelf

Brand share

Bad100%

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

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

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

100%

Top 20: 100%

Open market

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.

No pronounced peak months · busiest ÷ quietest = 2.2×

Open Trend

Top polyglutamic acid search terms

prequel multi quench serum12K/yr +23.3%15.9% conv.
prequel serum13K/yr -0.7%10.0% conv.
polyglutamic acid16K/yr -21.4%2.2% conv.
polyglutamic acid serum12K/yr -20.6%4.3% conv.
prequel hydrating serum8K/yr -22.8%14.7% conv.
prequel multi-quench plumping hydration serum3K/yr +110.9%14.7% conv.
prequel multi quench6K/yr -30.6%13.1% conv.
prequel hyaluronic acid3K/yr -22.3%8.4% conv.
polyglutamic acid serum for face2K/yr -4.9%2.7% conv.

All 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.

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

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$25.974.6★813 rev

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$13.624.3★1,358 rev

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$17.134.2★232 rev

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$19.104.2★598 rev

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$17.13232 rev

8mo ago

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$25.97813 rev

1y ago

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$19.10598 rev

2y ago

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$13.621,358 rev

3y ago

What buyers say about polyglutamic acid

What buyers praise and complain about, mined from review topics.

What buyers love

Moist/Dry30%

“Super hydrating”

Suitability Combination Skin9%

“I find it to be very effective for my skin”

Suitability Dry Skin7%

“I have sensitive, dry and red skin and this serum transforms it to something hydrated, glowy, and happy”

Value For Money6%

“great price as well”

Quality-Overall5%

“Great product”

Soft Feel3%

“Skin softener. Feels nice”

Allergies3%

“I havent gotten any irritation”

Brightness/Shine/Glow3%

“beautiful glow”

Absorbency3%

“Good product, great absorption”

Smell2%

“Its fragrance free”

What buyers complain about

Allergies13%

“Skin reaction”

Smell10%

“had a weird smell”

Moist/Dry10%

“Not super hydrating”

Functionality-Overall7%

“Doesn't work”

Adhesion/Stickiness6%

“almost as if it was attracting dirt on account of the stickiness”

Skin Health6%

“My skin burns”

Sensitivity-Overall5%

“feel like a burning sensation”

Suitability Dry Skin3%

“I don't know that it helped moisturize my skin at all”

Symptom Reduction3%

“did not see much improvement of redness after 6 weeks”

Value For Money2%

“The price in my opinion though is a little high”

Top return reasons

Functionality-Overall16%

Advertised Vs Actual Product11%

Smell8%

Moist/Dry7%

Adhesion/Stickiness7%

Skin Health5%

Motor Power5%

Product Condition5%

Value For Money4%

Leak-Proof4%

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.