Is glynac profitable to sell on Amazon United States?

The niche generates $375K/yr across 20 tracked products. 4 of 7 products launched in the last 360 days are still selling. 90-day search growth is +15.3%. Flapen's verdict: Worth a look (59/100).

How competitive is the glynac niche?

12 brands and 43 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 68% of demand.

What do buyers complain about in glynac?

Top complaints mined from reviews: Smell, Sleep Quality, Taste-Overall. The return rate is 0.0%.

When does demand for glynac peak?

Demand peaks in Nov; the busiest month runs 2.3× the quietest.

What does it cost to enter the glynac niche?

Listings span $10.25–$54.51; the average listing price is $25.61 (sweet spot $15–$100). The average incumbent carries 2,610 reviews — the moat a new listing must climb.

glynac

Worth a look

Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$25.61

avg listing price — sweet spot $15–$100

Price range

Great$10.25–$54.51

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Good6.4%

search→purchase rate — share of searches ending in a sale

Brand share

Good68%

top-5 brand share — brands hold most of the demand

Market size

Good$375K

$375K/yr · 227K searches

Growth

Okay+15.3%

90-day search growth — must beat 0% to launch

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Review moat

Okay2,610.2

avg incumbent reviews — the moat a new listing must climb

Competition

Okay62%

top-5 click share — leaders hold, buyers still browse

Signals No Dominant Brand

According to Flapen's Amazon United States niche tracking, glynac is a $375K/yr Amazon United States market (227K searches/yr). The top 5 brands hold 68% of demand. Demand peaks in Nov. Verdict: Worth a look — 59/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

glynac market data

Units sold / yr: 13K–15K; avg 500–750/product
Revenue / yr: $320K–$384K; units × avg price
Conversion rate: 6.4%
Avg BSR: #1,574
Page quality: 0%
Prime: 100%
Sponsored: 80%
Out of stock: 7.0%
Avg brand age: 65 months
Avg seller age: 165 days

Competition & brand share

The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 rising

Sellers

Top-5 brand share

68%

Top 20: 100%

Top-5 click share

62%

Top 20: 100%

Open market

22%

Nutricost16%
Nature's Fusions15%
PRISTINE'S14%
THEREXA12%
Pure Encapsulations11%
Utzy Naturals10%

Demand & seasonality

Weekly Amazon search volume, last 99 weeks — +15.3% search growth over the last 90 days.

Peak months: Nov · busiest ÷ quietest = 2.3×

Open Trend

Top glynac search terms

glynac111K/yr +21.4%5.4% conv.
glynac supplement47K/yr +14.2%5.4% conv.
nac glycine15K/yr +3.8%5.3% conv.
glynac powder9K/yr +9.0%4.4% conv.
glycine nac13K/yr -32.0%5.0% conv.
gly nac4K/yr +135.7%6.3% conv.
glynac supplement 1000mg4K/yr +72.9%6.3% conv.
nac + glycine4K/yr +0.2%5.9% conv.
nac and glycine5K/yr -5.3%4.5% conv.
nac with glycine4K/yr +10.0%3.1% conv.

All search terms

Top glynac 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 20 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Nutricost NAC + Glycine Powder (250 Grams) Unflavored Gluten-Free

Nutricost$21.454.4★119 rev

GlyNAC-ET NAC Supplement N-Acetyl Cysteine Ethyl Ester - 20x More Bioavailable - Glycine & N-Acetylcysteine Ethyl Ester Anti Aging Supplement Boost Glutathione 60 Capsules - Nutri - 3rd Party Tested

Nature's Fusions$25.314.4★462 rev

THEREXA GLYNAC Supplement 1200MG - Glycine & NAC Supplements USA Tested - 90 Capsules

THEREXA$20.144.5★61 rev

GlyNAC Supplement Complex Large Size Tablet 1600MG Glutathione Production - 3rd Party Tested Healthy Aging & Cognitive Support - Glycine & NAC Gluten Free Non GMO USA Made Glass Bottle

PRISTINE'S$24.134.2★83 rev

Pure Encapsulations NAC + Glycine Powder - Immune Support Detox Cleanse & Glutathione Production* - Conditionally Essential Amino Acids - Gluten Free & Non-GMO - 5.6 oz

Pure Encapsulations$36.314.2★390 rev

Newest

by launch date

PRISTINES Large Tablet GlyNAC Complex 1600mg Glycine 1000mg + NAC 600mg Supplement Glutathione & Antioxidant Support 120 Large Scored Tablets Vegan Non-GMO Gluten-Free

PRISTINE'S$24.984 rev

2mo ago

OMRE - Glycine (1000mg) + NAC Supplement (500mg) Amino Acid Formula for Antioxidant Liver & Cellular Health Support Gluten-Free - Glutathione Support

OMRE$33.8024 rev

5mo ago

THEREXA GLYNAC Supplement 1200MG - Glycine & NAC Supplements USA Tested - 90 Capsules

THEREXA$20.1461 rev

6mo ago

GREABBY Glynac Gummies Glycine & N-Acetyl Cysteine Supplement for Adults with Quercetin Vitamin C & Zinc Liver & Cellular Support Glutathione Production 60 Count

GREABBY$19.7034 rev

6mo ago

Age Finity NAD+ & NR Cellular Optimization Mitochondrial Supplement - NAD Nicotinamide Riboside TMG CoQ10 GlyNAC Resveratrol Spermidine - Cellular Longevity - 3rd Party Tested Glass Bottle

PRISTINE'S$25.5136 rev

6mo ago

What buyers say about glynac

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

What buyers love

Quality-Overall15%

“The quality is always consistent”

Sleep Quality14%

“Better sleep”

Value For Money7%

“Fair price”

Vitamin5%

“Good Supplement”

Nutritional Content4%

“Great nutritional supplements, excellent contents”

Ingredients-Overall3%

“The ingredients are pure”

Dosage3%

“Easy to take, right dosage”

Side Effects3%

“Very pleased with the effects of this product”

Taste-Overall3%

“No issues with taste”

Ease Of Use2%

“easy to read”

What buyers complain about

Smell11%

“it stinks”

Sleep Quality7%

“this did not help me sleep at all”

Taste-Overall7%

“Tastes absolutely wretched”

Size-Overall6%

“Very big size tablets”

Functionality-Overall5%

“Did not help”

Dosage5%

“Did not Find it effective in dose of 2,000 mg/ day”

Side Effects4%

“woke up dizzy headed”

Quality-Overall3%

“I expect better quality control at this price point”

Value For Money2%

“Waste of money”

Flavor2%

“The glycine I've been taking was unflavored-as I assumed all glycine was”

Top return reasons

Functionality-Overall21%

Advertised Vs Actual Product17%

Dosage13%

Sleep Quality8%

Vitamin8%

Product Condition4%

Acid Regulator/Stomach Ache Relief4%

Side Effects4%

Calcium4%

Sour4%

Common questions

Is glynac profitable to sell on Amazon United States?: The niche generates $375K/yr across 20 tracked products. 4 of 7 products launched in the last 360 days are still selling. 90-day search growth is +15.3%. Flapen's verdict: Worth a look (59/100).
How competitive is the glynac niche?: 12 brands and 43 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 68% of demand.
What do buyers complain about in glynac?: Top complaints mined from reviews: Smell, Sleep Quality, Taste-Overall. The return rate is 0.0%.
When does demand for glynac peak?: Demand peaks in Nov; the busiest month runs 2.3× the quietest.
What does it cost to enter the glynac niche?: Listings span $10.25–$54.51; the average listing price is $25.61 (sweet spot $15–$100). The average incumbent carries 2,610 reviews — the moat a new listing must climb.

glynac

glynac market data

Competition & brand share

Demand & seasonality

Top glynac search terms

Top glynac products on Amazon

Top sellers

Newest

Trending

What buyers say about glynac

What buyers love

What buyers complain about

Top return reasons

Common questions

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