---
title: "glycine 3g — Niche Verdict: Skip it (48/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/health-household/glycine-3g"
last_updated: "2026-07-14T03:10:24.844Z"
locale: en
meta:
  description: "soft demand (-34.4% this quarter) — glycine 3g doesn't clear our bar today."
  "og:description": "soft demand (-34.4% this quarter) — glycine 3g doesn't clear our bar today."
  "og:title": "glycine 3g — Niche Verdict: Skip it (48/100) | Amazon United States - Flapen"
---

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# **glycine 3g**

**Skip it**

Soft demand (-34.4% this quarter) — this niche doesn't clear our bar today.

Market size 35Growth 8Conversion 91Competition 27Returns 100Price range 77Avg price 86Brand share 50Review moat 50Quality gap 30

**Returns**

**Incredible****0.0%**

return rate — above 6% kills the launch gate

**Conversion**

**Great****10.9%**

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

**Avg price**

**Great****$19.46**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$9.89–$33.21**

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

**Brand share**

**Good****75%**

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

**Review moat**

**Okay****1,544.38**

avg incumbent reviews — the moat a new listing must climb

**Market size**

**Okay****$171K**

$171K/yr · 81K searches

**Quality gap**

**Okay****4.6★**

avg incumbent rating — lower means beatable quality

**Competition**

**Okay****69%**

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

**Growth**

**Bad****-34.4%**

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

## **Competition**

The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.

**Brands**

**13 **▲rising

**Sellers**

**31**

**Top-5 brand share**

**75%**

**Open market**

**17%**

- Pure Encapsulations26% - THORNE16% - BulkSupplements13% - NOW Foods11% - Nutricost9% - Life Extension8% - Open — no brand owns it (7 brands, 17%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$17K20%$34K30%$51K40%$69K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 16 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Pure Encapsulations Glycine - Supports Restful Sleep & Liver Detox* - Liver Supplement - Vegan & Gluten-Free - 180 Capsules](https://m.media-amazon.com/images/I/31SZtqGdIqL.jpg)**Pure Encapsulations Glycine - Supports Restful Sleep & Liver Detox* - Liver Supplement - Vegan & Gluten-Free - 180 Capsules**Pure Encapsulations**$33.21**4.6★903 rev](https://www.amazon.com/dp/B0016BX8O2) [2![THORNE - Glycine - Supports Relaxation Stress Management Detoxification & Healthy Muscle Function* - Amino Acid Supplement - Third-Party Certified - Gluten Dairy & Soy-Free - 250 Capsules](https://m.media-amazon.com/images/I/31Ya0WGhANL.jpg)**THORNE - Glycine - Supports Relaxation Stress Management Detoxification & Healthy Muscle Function* - Amino Acid Supplement - Third-Party Certified - Gluten Dairy & Soy-Free - 250 Capsules**THORNE**$30.06**4.6★1,452 rev](https://www.amazon.com/dp/B000VYRROC) [3![BulkSupplements.com Glycine Capsules - Amino Acid Supplement 3000mg - Gluten Free 4 Capsules per Serving 360 Count (Pack of 1)](https://m.media-amazon.com/images/I/413iC6f9oxL.jpg)**BulkSupplements.com Glycine Capsules - Amino Acid Supplement 3000mg - Gluten Free 4 Capsules per Serving 360 Count (Pack of 1)**BulkSupplements**$20.81**4.4★719 rev](https://www.amazon.com/dp/B0BNSW4ZDQ) [4![Nutricost Glycine Powder 1lb - Non-GMO Gluten Free](https://m.media-amazon.com/images/I/41wQGAN42ZL.jpg)**Nutricost Glycine Powder 1lb - Non-GMO Gluten Free**Nutricost**$21.75**4.6★1,555 rev](https://www.amazon.com/dp/B09F83CPX8) [5![Life Extension Glycine 1000 mg Amino Acid that Promotes Healthy Sleep Gluten-Free Non-GMO Vegetarian 100 Capsules](https://m.media-amazon.com/images/I/41uKQNC-Y3L.jpg)**Life Extension Glycine 1000 mg Amino Acid that Promotes Healthy Sleep Gluten-Free Non-GMO Vegetarian 100 Capsules**Life Extension**$11.59**4.6★3,334 rev](https://www.amazon.com/dp/B00B35A394)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Innate Vitality Glycine Supplements 3000mg per Serving Bioavailable Form Sleep Relax Collagen Glutathione Production Non-GMO Conditionally Essential Amino Acids Vegan 240 Capsules](https://m.media-amazon.com/images/I/418wMk4AnnL.jpg)**Innate Vitality Glycine Supplements 3000mg per Serving Bioavailable Form Sleep Relax Collagen Glutathione Production Non-GMO Conditionally Essential Amino Acids Vegan 240 Capsules**Innate Vitality**$24.95**44 rev5mo ago](https://www.amazon.com/dp/B0FMHJ71G1) [![HOLLEGEND Glycine 3g Gummies Organic L-Glycine with NAC Supplements for Sleep & Cellular Support Plus B6 L-Theanine & Taurine for Nerve Liver Detox & Immune Health Sugar Free Vegan 60 Chews](https://m.media-amazon.com/images/I/41NkfWODtiL.jpg)**HOLLEGEND Glycine 3g Gummies Organic L-Glycine with NAC Supplements for Sleep & Cellular Support Plus B6 L-Theanine & Taurine for Nerve Liver Detox & Immune Health Sugar Free Vegan 60 Chews**HOLLEGEND**$21.66**54 rev6mo ago](https://www.amazon.com/dp/B0GD5JFCJC) [![duwhot Glycine Gummies 3g(3000 mg) Glycine Supplements for Sleep Detox Relax Nerve Support Blueberry Flavor Sugar-Free Vegan Non-GMO Gluten-Free 60 Ct.](https://m.media-amazon.com/images/I/41QMzoTJarL.jpg)**duwhot Glycine Gummies 3g(3000 mg) Glycine Supplements for Sleep Detox Relax Nerve Support Blueberry Flavor Sugar-Free Vegan Non-GMO Gluten-Free 60 Ct.**duwhot**$20.78**113 rev8mo ago](https://www.amazon.com/dp/B0FYWRYY2V) [![Glycine 2 000mg Per Serving 240 Veggie Capsules | Free Form | Double Strength Amino Acids | Restful Sleep and Neurotransmitter Support Supplements | Non-GMO Gluten Free](https://m.media-amazon.com/images/I/41MWHpbrfFL.jpg)**Glycine 2 000mg Per Serving 240 Veggie Capsules | Free Form | Double Strength Amino Acids | Restful Sleep and Neurotransmitter Support Supplements | Non-GMO Gluten Free**Micro Ingredients**$15.93**245 rev1y ago](https://www.amazon.com/dp/B0DW1BXPMV) [![Puregen Labs Glycine 1000mg [High Potency] 100 Vegetarian Capsules Promotes Healthy Rest | No Harmful Additives | Non-GMO NO Gluten and Dairy -100 Servings](https://m.media-amazon.com/images/I/41L9QWe38BL.jpg)**Puregen Labs Glycine 1000mg \[High Potency\] 100 Vegetarian Capsules Promotes Healthy Rest | No Harmful Additives | Non-GMO NO Gluten and Dairy -100 Servings**P Puregen Labs**$9.89**545 rev1y ago](https://www.amazon.com/dp/B0DDQVTZ8Y)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![HOLLEGEND Glycine 3g Gummies Organic L-Glycine with NAC Supplements for Sleep & Cellular Support Plus B6 L-Theanine & Taurine for Nerve Liver Detox & Immune Health Sugar Free Vegan 60 Chews](https://m.media-amazon.com/images/I/41NkfWODtiL.jpg)**HOLLEGEND Glycine 3g Gummies Organic L-Glycine with NAC Supplements for Sleep & Cellular Support Plus B6 L-Theanine & Taurine for Nerve Liver Detox & Immune Health Sugar Free Vegan 60 Chews**HOLLEGEND**$21.66**4.5★**▲ 155%**](https://www.amazon.com/dp/B0GD5JFCJC) [![Innate Vitality Glycine Supplements 3000mg per Serving Bioavailable Form Sleep Relax Collagen Glutathione Production Non-GMO Conditionally Essential Amino Acids Vegan 240 Capsules](https://m.media-amazon.com/images/I/418wMk4AnnL.jpg)**Innate Vitality Glycine Supplements 3000mg per Serving Bioavailable Form Sleep Relax Collagen Glutathione Production Non-GMO Conditionally Essential Amino Acids Vegan 240 Capsules**Innate Vitality**$24.95**4.9★**▲ 130%**](https://www.amazon.com/dp/B0FMHJ71G1) [![duwhot Glycine Gummies 3g(3000 mg) Glycine Supplements for Sleep Detox Relax Nerve Support Blueberry Flavor Sugar-Free Vegan Non-GMO Gluten-Free 60 Ct.](https://m.media-amazon.com/images/I/41QMzoTJarL.jpg)**duwhot Glycine Gummies 3g(3000 mg) Glycine Supplements for Sleep Detox Relax Nerve Support Blueberry Flavor Sugar-Free Vegan Non-GMO Gluten-Free 60 Ct.**duwhot**$20.78**4.4★**▲ 53%**](https://www.amazon.com/dp/B0FYWRYY2V) [![Glycine Supplement - 1 000mg Glycine Powder per Serving (300 Capsules) The Relaxing Amino Acid (Glicina) (Third Party Tested Gluten Free Non-GMO) by Double Wood](https://m.media-amazon.com/images/I/41dc1a4lW2L.jpg)**Glycine Supplement - 1 000mg Glycine Powder per Serving (300 Capsules) The Relaxing Amino Acid (Glicina) (Third Party Tested Gluten Free Non-GMO) by Double Wood**Double Wood Supplements**$19.26**4.6★**▲ 49%**](https://www.amazon.com/dp/B08FCRJW9V) [![Nutricost Glycine Powder 1lb - Non-GMO Gluten Free](https://m.media-amazon.com/images/I/41wQGAN42ZL.jpg)**Nutricost Glycine Powder 1lb - Non-GMO Gluten Free**Nutricost**$21.75**4.6★**▲ 25%**](https://www.amazon.com/dp/B09F83CPX8)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 53 weeks — -34.4% search growth over the last 90 days.

3K2KSpike '25Black Friday '25Holiday '25Spike '26 seasonJulAugSepOctNovDecJanFebMarAprMayJun

Peak months: Jan, Feb, Mar, Dec · busiest ÷ quietest = 3.8×

## **Reviews**

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

### **What buyers love **

**Sleep Quality**29%

*“Helps me sleep”*

**Quality-Overall**12%

*“Quality products Good price Quick Delivery”*

**Value For Money**5%

*“Great value”*

**Taste-Overall**5%

*“no funky aftertaste”*

**Vitamin**4%

*“Good quality vitamins”*

**Solubility**2%

*“It dissolves super easily”*

**Sweetness**2%

*“Tastes slightly sweet”*

**Nutritional Content**2%

*“Best Supplement Out There”*

**Dosage**2%

*“with a good amount per capsule”*

**Stress/Anxiety**2%

*“Effective in reducing stress”*

### **What buyers complain about **

**Sleep Quality**19%

*“Did not help with sleep”*

**Functionality-Overall**8%

*“Didn't work for me”*

**Dosage**6%

*“The dosage is not clearly listed on the sales page”*

**Quality-Overall**6%

*“Poor Quality Control”*

**Solubility**5%

*“Does not dissolve”*

**Taste-Overall**4%

*“Completely different taste”*

**Side Effects**4%

*“Now I have dizziness and vertigo”*

**Smell**4%

*“Chemical Smell”*

**Value For Money**2%

*“Too Expensive - glycine is glycine”*

**Stress/Anxiety**2%

*“My next day was wrecked with exhaustion”*

### **Top return reasons **

**Sleep Quality**24%

**Functionality-Overall**18%

**Dosage**12%

**Hard Feel**6%

**Advertised Vs Actual Product**6%

**Muscle Pain Relief**6%

**Blood Sugar Level**6%

**Acid Regulator/Stomach Ache Relief**6%

**Calcium**6%

**Adhesion/Stickiness**6%