---
title: "Glycine Powder — $2.0M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/glycine-powder"
last_updated: "2026-08-06T20:27:49.204Z"
locale: en
meta:
description: "Niche score 60/100 · $2.0M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 60/100 · $2.0M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Glycine Powder — $2.0M/yr Amazon US Niche (2026) - Flapen"
---
# **glycine powder**
**Worth a look**
Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 94Growth 12Conversion 97Competition 20Returns 100Price range 82Avg price 95Brand share 39Review moat 62Quality gap 52
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****14.5%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Incredible****$22.94**
avg listing price — sweet spot $15–$100
**Market size**
**Great****$2.0M**
$2.0M/yr · 593K searches
**Price range**
**Great****$10.70–$36.31**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****1,021.67**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****82%**
top-5 brand share — brands hold most of the demand
**Competition**
**Bad****76%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-26.3%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, glycine powder is a $2.0M/yr Amazon United States market (593K searches/yr). The top 5 brands hold 82% of demand. Demand peaks in Feb–Sep. Verdict: Worth a look — 60/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **glycine powder market data**
- **Units sold / yr**
- **80K–100K**
- avg 5,000–6,000/product
- **Revenue / yr**
- **$1.8M–$2.3M**
- units × avg price
- **Conversion rate**
- **14.5%**
- **Avg BSR**
- **#1,454**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **78%**
- **Out of stock**
- **5.3%**
- **Avg brand age**
- **58 months**
- **Avg seller age**
- **161 days**
## **Competition & brand share**
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**15 **▲rising
**Sellers**
**30**
**Top-5 brand share**
**82%**
Top 20: 100%
**Top-5 click share**
**76%**
Top 20: 100%
**Open market**
**16%**
- Nutricost27% - BulkSupplements23% - NOW Foods19% - Micro Ingredients8% - Pure Encapsulations4% - THORNE3% - Open — no brand owns it (9 brands, 16%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -26.3% search growth over the last 90 days.
20K15KSpike '24Black Friday '24Spike '25Prime Day '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Feb, Sep · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/health-household/glycine-powder/trend)
## **Top glycine powder search terms**
- **glycine powder**453K/yr-29.2%13.4% conv. - **glycine powder organic**38K/yr-32.1%9.4% conv. - **glicina en polvo**9K/yr+171.7%1.7% conv. - **now glycine powder**13K/yr-5.1%23.4% conv. - **nutricost glycine powder**7K/yr-21.3%23.3% conv. - **now foods glycine powder**6K/yr-6.6%18.2% conv. - **bulk supplements glycine**7K/yr-16.9%13.2% conv. - **nutricost glycine**7K/yr-26.3%11.7% conv. - **bulk supplements glycine powder**5K/yr-7.2%17.4% conv. - **glycine powder for sleep**10K/yr-54.6%11.8% conv. [**All search terms **](https://flapen.com/research/us/health-household/glycine-powder/search-terms)
## **Top glycine powder 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%10%$197K20%$394K30%$591K40%$788K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Nutricost Glycine Powder 1lb - Non-GMO Gluten Free**Nutricost**$21.80**4.6★1,593 rev](https://www.amazon.com/dp/B09F83CPX8) [2**BulkSupplements.com Glycine Powder - Glycine Supplements Amino Acid Supplement - Unflavored & Gluten Free 3g per Serving 500g (1.1 lbs) (Pack of 1)**BulkSupplements**$20.62**4.4★4,286 rev](https://www.amazon.com/dp/B00EOXU0N6) [3**NOW Foods Supplements Glycine Pure Powder Promotes Restful Sleep* Neurotransmitter Support* 1-Pound**NOW Foods**$17.26**4.6★2,229 rev](https://www.amazon.com/dp/B0013OVZJW) [4**Micro Ingredients Glycine Powder 1KG (2.2 Pounds) Glycine 1000mg Per Serving Water Soluble and Product of USA**Micro Ingredients**$29.01**4.6★1,224 rev](https://www.amazon.com/dp/B01LBILPCG) [5**BulkSupplements.com Glycine Powder - Glycine Supplements Amino Acid Supplement - Unflavored & Gluten Free 3g per Serving 1kg (2.2 lbs) (Pack of 1)**BulkSupplements**$28.92**4.4★4,286 rev](https://www.amazon.com/dp/B00EOXU0MM)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Glycine Powder -Glycine Supplements- Glycine Amino Acid Pure & Gluten Free - 500 Gram (1.1lb)**MS Finechem**$12.83**11 rev4mo ago](https://www.amazon.com/dp/B0GTX83LRC) [**Vitamatic Glycine Powder 3 000 mg Per Serving Free-Form Amino Acid Supplement Unflavored 17.6 oz (500 g) Non-GMO Gluten Free.**Vitamatic**$13.09**45 rev4mo ago](https://www.amazon.com/dp/B0GT2B6NW6) [**Glycine Powder 300 Servings (2 lb) 3 000 mg Free-Form Glycine Per Serving Unflavored Pure Powder Non-GMO cGMP Manufactured**NatureBell**$25.55**74 rev7mo ago](https://www.amazon.com/dp/B0G67JLRX6) [**Nutricost NAC + Glycine Powder (250 Grams) Unflavored Gluten-Free**Nutricost**$21.45**119 rev9mo ago](https://www.amazon.com/dp/B0FW18R82G) [![Essencea L-Glycine Powder 2lb Pure Bulk Ingredients | 100% L-Glycine | Premium Quality Supplement (32 Ounces) [Packaging May Vary]](https://m.media-amazon.com/images/I/41ZN3AC1e0L.jpg)**Essencea L-Glycine Powder 2lb Pure Bulk Ingredients | 100% L-Glycine | Premium Quality Supplement (32 Ounces) \[Packaging May Vary\]**Essencea**$16.68**126 rev3y ago](https://www.amazon.com/dp/B0BZP4PMDF)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[![Essencea L-Glycine Powder 2lb Pure Bulk Ingredients | 100% L-Glycine | Premium Quality Supplement (32 Ounces) [Packaging May Vary]](https://m.media-amazon.com/images/I/41ZN3AC1e0L.jpg)**Essencea L-Glycine Powder 2lb Pure Bulk Ingredients | 100% L-Glycine | Premium Quality Supplement (32 Ounces) \[Packaging May Vary\]**Essencea**$16.68**3.6★**▲ 282%**](https://www.amazon.com/dp/B0BZP4PMDF) [**Glycine Powder -Glycine Supplements- Glycine Amino Acid Pure & Gluten Free - 500 Gram (1.1lb)**MS Finechem**$12.83**4.8★**▲ 252%**](https://www.amazon.com/dp/B0GTX83LRC) [**Vitamatic Glycine Powder 3 000 mg Per Serving Free-Form Amino Acid Supplement Unflavored 17.6 oz (500 g) Non-GMO Gluten Free.**Vitamatic**$13.09**4.0★**▲ 210%**](https://www.amazon.com/dp/B0GT2B6NW6) [**Glycine Powder 300 Servings (2 lb) 3 000 mg Free-Form Glycine Per Serving Unflavored Pure Powder Non-GMO cGMP Manufactured**NatureBell**$25.55**4.3★**▲ 118%**](https://www.amazon.com/dp/B0G67JLRX6) [**Carlson Glycine Powder 2000 mg Amino Acid Supplement for Energy and Muscle Support 3.53 oz (100 g)**Carlson**$10.70**4.6★**▲ 93%**](https://www.amazon.com/dp/B06XS1XB2M)
**~~View all trending →~~**
## **What buyers say about glycine powder**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Sleep Quality**18%
*“Helps me sleep”*
**Quality-Overall**13%
*“Great quality in a large tub that will last”*
**Solubility**6%
*“Easy to Mix”*
**Taste-Overall**6%
*“Pleasant taste”*
**Value For Money**6%
*“Excellent price”*
**Sweetness**5%
*“It's a great sweetener”*
**Ingredients-Overall**3%
*“The ingredients are pure”*
**Ease Of Use**2%
*“Easy to Mix”*
**Vitamin**2%
*“NOW Vitamins - Good Quality Brand”*
**Advertised Vs Actual Product**2%
*“As advertised”*
### **What buyers complain about **
**Taste-Overall**11%
*“Weird taste”*
**Sleep Quality**8%
*“Did not help me sleep”*
**Solubility**6%
*“it did not dissolve”*
**Dosage**4%
*“the scoop & serving size appears to be 1,000mg, not 3,000mg as claimed”*
**Smell**3%
*“Product Smells Like Fish”*
**Functionality-Overall**3%
*“didnt help”*
**Quality-Overall**3%
*“There are obviously quality control issues with this company”*
**Side Effects**3%
*“Now I have dizziness and vertigo”*
**Flavor**3%
*“Anything I add it to has an altered flavor which is not good”*
**Artificial Sweeteners**2%
*“Funny enough, it taste like an artificial sweetener”*
### **Top return reasons **
**Sleep Quality**18%
**Dosage**11%
**Taste-Overall**11%
**Muscle Pain Relief**7%
**Side Effects**7%
**Sour**7%
**Calcium**7%
**Functionality-Overall**7%
**Acid Regulator/Stomach Ache Relief**7%
**Adhesion/Stickiness**7%
## **Common questions**
- **Is glycine powder profitable to sell on Amazon United States?**
- The niche generates $2.0M/yr across 18 tracked products. 3 of 4 products launched in the last 360 days are still selling. 90-day search growth is -26.3%. Flapen's verdict: Worth a look (60/100).
- **How competitive is the glycine powder niche?**
- 15 brands and 30 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 82% of demand.
- **What do buyers complain about in glycine powder?**
- Top complaints mined from reviews: Taste-Overall, Sleep Quality, Solubility. The return rate is 0.0%.
- **When does demand for glycine powder peak?**
- Demand peaks in Feb–Sep; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the glycine powder niche?**
- Listings span $10.70–$36.31; the average listing price is $22.94 (sweet spot $15–$100). The average incumbent carries 1,022 reviews — the moat a new listing must climb.
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