L Glutamine
Launch itA $6.2M/yr market growing +17.8% this quarter with returns at 0.0% — clears our launch bar.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Market size
Incredible$6.2M$6.2M/yr · 2.2M searches
Conversion
Incredible12.1%search→purchase rate — share of searches ending in a sale
Avg price
Great$22.74avg listing price — sweet spot $15–$100
Price range
Great$9.35–$64.94cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good49%top-5 click share — leaders hold, buyers still browse
Brand share
Okay75%top-5 brand share — brands hold most of the demand
Growth
Okay+17.8%90-day search growth — must beat 0% to launch
Review moat
Bad4,777.96avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Is l glutamine profitable on Amazon?
According to Flapen's Amazon United States niche tracking, l glutamine is a $6.2M/yr Amazon United States market (2.2M searches/yr). The top 5 brands hold 75% of demand. Demand peaks in May. Verdict: Launch it — 68/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
l glutamine market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 250K–300K
- avg 10,000–12,500/product
- Revenue / yr
- $5.7M–$6.8M
- units × avg price
- Conversion rate
- 12.1%
- Avg BSR
- #140
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 84%
- Out of stock
- 0.0%
- Avg brand age
- 75 months
- Avg seller age
- 144 days
Competition: brands, sellers & click share
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.Brands
16 rising
Sellers
41
Top-5 brand share
75%
Top 20: 100%
Top-5 click share
49%
Top 20: 94%
Open market
20%
- Nutricost37%
- THORNE12%
- Pure Encapsulations11%
- NOW Foods11%
- BulkSupplements4%
- Sports Research4%
l glutamine demand & seasonality
Weekly Amazon search volume, last 103 weeks — +17.8% search growth over the last 90 days.Peak months: May · busiest ÷ quietest = 2.1×
Top l glutamine search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- l glutamine557K/yr
- glutamine585K/yr
- l glutamine powder285K/yr
- l-glutamine207K/yr
- glutamine powder195K/yr
- l-glutamine powder72K/yr
- l glutamine capsules80K/yr
- glutamina47K/yr
- glutamine capsules40K/yr
- l glutamine powder organic15K/yr
Top l glutamine products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Nutricost L-Glutamine Powder (500 Grams) Unflavored 100 Servings GMO-Free
Nutricost$22.664.6★18,395 rev
NOW Foods Supplements L-Glutamine 500 mg Nitrogen Transporter* Amino Acid 120 Veg Capsules
NOW Foods$9.354.5★13,166 rev
Nutricost L-Glutamine Powder 1 KG - Unflavored Non-GMO Gluten Free
Nutricost$29.384.6★18,395 rev
Pure Encapsulations L-Glutamine 500 mg - Supplement for Immune and Digestive Support Gut Health and Lining Metabolism and Muscle Support* - with Free-Form L-Glutamine - 90 Capsules
Pure Encapsulations$23.514.6★2,190 rev
THORNE - L-Glutamine - Amino Acid Supplement for Immune System & GI Health - Promotes Post-Exercise Muscle Cell Repair* - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Capsules
THORNE$25.054.6★1,669 rev
Newest
by launch date
Amazon Basics L-Glutamine Powder 10.58 oz 100 Servings
Amazon Basics$14.6065 rev
Wellah L-Glutamine Powder (Strawberry Lemonade) 50 Servings
Wellah$18.90289 rev
Sports Research L-Glutamine - Workout Recovery Immune Health & Gut Health Support - 5 G Per Serving - 17.64 Oz
Sports Research$23.37836 rev
Sports Research L-Glutamine - Workout Recovery Immune Health & Gut Health Support - 5 G Per Serving - 10.58 Oz
Sports Research$14.21836 rev
L Glutamine Capsules - (1000mg Servings 120 Capsules) Non-GMO Gluten Free Keto Safe Vegan Friendly Third Party Tested (for Endurance and Gut Health) by Double Wood
Double Wood Supplements$9.92542 rev
Trending
90-day click momentumAmazon Basics L-Glutamine Powder 10.58 oz 100 Servings
Amazon Basics$14.604.8★
Pure L-Glutamine Powder 2.2lbs (1kg) | Free Form Amino Acid | Unflavored Glutamine Supplement | Non-GMO Vegan Friendly
Micro Ingredients$29.784.6★
Pure Encapsulations L-Glutamine Powder - Supplement for Immune and Digestive Support Gut Health and Lining Metabolism and Muscle Support* - with Pure Free-Form L-Glutamine - 8 Ounces
Pure Encapsulations$54.054.6★
Wellah L-Glutamine Powder (Strawberry Lemonade) 50 Servings
Wellah$18.904.6★
Nutricost L-Glutamine Powder 1 KG - Unflavored Non-GMO Gluten Free
Nutricost$29.384.6★
What reviews say buyers love and hate about l glutamine
What buyers praise and complain about, mined from review topics.What buyers love
“It is very consistent in quality”
“Good price”
“Tastes good and is healthy”
“HELPS GUT”
“Good suplement vitamin”
“Its easy to mix”
“No more pain or bloating”
“Great in protein coffee”
“Good and as advertised”
“It makes my life easier honestly”
What buyers complain about
“It doesnt taste right”
“I know that possibly not long enough to take it for the effects to take hold”
“Neutral Taste: It is truly unflavored”
“Poor quality control”
“have a corn allergy/intolerance”
“Never dissolves”
“this one felt like it made no impact”
“Chemical smell now”
“Formula Changed and I'm Sad”
“Would be 5 stars if the container were slightly smaller”
Top return reasons
Common l glutamine questions
- Is l glutamine profitable to sell on Amazon United States?
- The niche generates $6.2M/yr across 25 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +17.8%. Flapen's verdict: Launch it (68/100).
- How competitive is the l glutamine niche?
- 16 brands and 41 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 75% of demand.
- What do buyers complain about in l glutamine?
- Top complaints mined from reviews: Taste-Overall, Dosage, Flavor. The return rate is 0.0%.
- When does demand for l glutamine peak?
- Demand peaks in May; the busiest month runs 2.1× the quietest.
- What does it cost to enter the l glutamine niche?
- Listings span $9.35–$64.94; the average listing price is $22.74 (sweet spot $15–$100). The average incumbent carries 4,778 reviews — the moat a new listing must climb.