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nutricost l glutamine

Skip it

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

Market size 8Growth 46Conversion 89Competition 0Returns 100Price range 95Avg price 90Brand share 0Review moat 19Quality gap 28

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Price range

Incredible$15.77–$29.38

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

Avg price

Great$20.90

avg listing price — sweet spot $15–$100

Conversion

Great10.5%

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

Growth

Okay+16.8%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad14,981.25

avg incumbent reviews — the moat a new listing must climb

Market size

Bad$33K

$33K/yr · 15K searches

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, nutricost l glutamine is a $33K/yr Amazon United States market (15K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 40/100.

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

nutricost l glutamine market data

Units sold / yr
2K–3K
avg 500–750/product
Revenue / yr
$42K–$52K
units × avg price
Conversion rate
10.5%
Avg BSR
#3
Page quality
0%
Prime
100%
Sponsored
100%
Out of stock
0.0%
Avg brand age
121 months
Avg seller age
183 days

Competition & brand share

The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.

Brands

1 flat

Sellers

2

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

100%

Top 20: 100%

Open market

0%

  • Nutricost100%

Demand & seasonality

Weekly Amazon search volume, last 97 weeks — +16.8% search growth over the last 90 days.
400300Prime Day '25Spike '25Black Friday '25Spike '26DecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.5×

Top nutricost l glutamine search terms

  • nutricost l glutamine7K/yr
  • nutricost glutamine6K/yr
  • nutricost l glutamine powder2K/yr
All search terms

Top nutricost l glutamine 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%15%$5K30%$10K45%$15K60%$20K1K10K100K Reviews — right = deep review moat Market 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.

What buyers say about nutricost l glutamine

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

What buyers love

Quality-Overall22%

“It is very consistent in quality”

Value For Money11%

“am glad to have easy access to it at a reasonable cost”

Regulates Digestion10%

“Really helps me digest food properly”

Nutritional Content8%

“But Nutricost supplements are always good”

Acid Regulator/Stomach Ache Relief6%

“does not upset my stomach”

Vitamin6%

“Simply one of the better supplement companies around”

Muscle Pain Relief4%

“This glutamine will eliminate sore muscles”

Ease Of Use3%

“It makes my life easier honestly”

Cough Relief3%

“Great for helping leaky gut”

Solubility3%

“It dissolves easily”

What buyers complain about

Taste-Overall17%

“There is no taste”

Allergies13%

“have a corn allergy/intolerance”

Solubility12%

“L-glutamine should be a fine crystalline powder that easily dissolves in water not a flour-like powder that doesnt dissolve very well”

Flavor4%

“Doesnt have flavor”

Moist/Dry3%

“Typically, it's more on the powdery side, looking dull and dry”

Dosage3%

“so I quit taking it”

Bitter3%

“It's so bitter it ruins the taste of anything i mix it with”

Functionality-Overall3%

“My body did not get the same response compared to other brands”

Satisfaction/Pleasure3%

“I was not satisfied”

Vegan/Organic2%

“Not pure”

Top return reasons

Value For Money40%
Satisfaction/Pleasure20%
Functionality-Overall20%
Size-Overall20%

Common questions

Is nutricost l glutamine profitable to sell on Amazon United States?
The niche generates $33K/yr across 4 tracked products. 90-day search growth is +16.8%. Flapen's verdict: Skip it (40/100).
How competitive is the nutricost l glutamine niche?
1 brands and 2 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in nutricost l glutamine?
Top complaints mined from reviews: Taste-Overall, Allergies, Solubility. The return rate is 0.0%.
When does demand for nutricost l glutamine peak?
Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the nutricost l glutamine niche?
Listings span $15.77–$29.38; the average listing price is $20.90 (sweet spot $15–$100). The average incumbent carries 14,981 reviews — the moat a new listing must climb.