glycine powder
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible20.4%search→purchase rate — share of searches ending in a sale
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Review moat
Good696.5avg incumbent reviews — the moat a new listing must climb
Market size
Okay£122K£122K/yr · 64K searches
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Avg price
Okay£9.32avg listing price — sweet spot $15–$100
Price range
Bad£3.97–£18.00cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Bad-28.1%90-day search growth — must beat 0% to launch
Competition
Bad92%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, glycine powder is a £122K/yr Amazon United Kingdom market (64K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 36/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
glycine powder market data
- Units sold / yr
- 10K–13K
- avg 750–1,000/product
- Revenue / yr
- £93K–£117K
- units × avg price
- Conversion rate
- 20.4%
- Avg BSR
- #325
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 50%
- Out of stock
- 19.5%
- Avg brand age
- 44 months
- Avg seller age
- 171 days
Competition & brand share
The top 5 products capture 92% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 falling
Sellers
7
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
92%
Top 20: 100%
Open market
0%
- Bulk36%
- Peak Supps25%
- lalea21%
- Vegavero14%
- Hatton Hill3%
Demand
Weekly Amazon search volume, last 12 weeks — -28.1% search growth over the last 90 days.Top glycine powder search terms
- glycine powder59K/yr
- glycine powder organic3K/yr
- glycine powder 1kg2K/yr
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.
All 8 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Bulk Glycine Powder 500 g
Bulk£3.974.6★822 rev
LALEA Pure Glycine Powder 500g 100% Pure L-Glycine Amino Acid Supplement Vegan No Additives Highly Soluble Supports Sleep Muscle Recovery & Collagen Production
lalea£8.074.5★306 rev
Glycine Powder | Pure L-Glycine | Vegan Friendly GMO Free (500g)
Peak Supps£6.974.6★604 rev
Vegavero Pure Glycine Powder 1 kg | 3000 mg Daily Dose | NO Additives Lab-Tested | Recovery Muscle & Collagen Synthesis | with Measuring Spoon | Vegan
Vegavero£18.004.5★2,394 rev
Glycine Powder 1Kg | Pure L-Glycine | Vegan Friendly GMO Free
Peak Supps£12.394.6★604 rev
Newest
by launch dateLALEA Pure Glycine Powder 500g 100% Pure L-Glycine Amino Acid Supplement Vegan No Additives Highly Soluble Supports Sleep Muscle Recovery & Collagen Production
lalea£8.07306 rev
Vegavero Pure Glycine Powder 300 g | 3000 mg Daily Dose | NO Additives Lab-Tested | Recovery Muscle & Collagen Synthesis | with Measuring Spoon | Vegan
Vegavero£11.91222 rev
Glycine Powder 500g Pure Amino Acid Supplement for Sleep Muscle Recovery and Anti-Aging 100% Vegan Non-GMO by Hatton Hill
Hatton Hill£8.1316 rev
Vegavero Pure Glycine Powder 1 kg | 3000 mg Daily Dose | NO Additives Lab-Tested | Recovery Muscle & Collagen Synthesis | with Measuring Spoon | Vegan
Vegavero£18.002,394 rev
Glycine Powder | Pure L-Glycine | Vegan Friendly GMO Free (500g)
Peak Supps£6.97604 rev
Trending
90-day click momentumLALEA Pure Glycine Powder 500g 100% Pure L-Glycine Amino Acid Supplement Vegan No Additives Highly Soluble Supports Sleep Muscle Recovery & Collagen Production
lalea£8.074.5★
Bulk Glycine Powder 500 g
Bulk£3.974.6★
Glycine Powder 500g Pure Amino Acid Supplement for Sleep Muscle Recovery and Anti-Aging 100% Vegan Non-GMO by Hatton Hill
Hatton Hill£8.134.8★
Glycine Powder 1Kg | Pure L-Glycine | Vegan Friendly GMO Free
Peak Supps£12.394.6★
Vegavero Pure Glycine Powder 1 kg | 3000 mg Daily Dose | NO Additives Lab-Tested | Recovery Muscle & Collagen Synthesis | with Measuring Spoon | Vegan
Vegavero£18.004.5★
What buyers say about glycine powder
What buyers praise and complain about, mined from review topics.What buyers love
“Helps me sleep better”
“Tastes nice as well”
“Good quality product”
“Good deal”
“Mixes easily”
“The taste is naturally sweet and pleasant”
“The vegan tag is handy too”
“Good ingredients at decent strengths and good value”
“found it straightforward to take”
“it does have a calming feel”
What buyers complain about
“Im not an expert just historically a very poor sleeper”
“It did make me tired about two hours after taking it”
“Not sure its working but will keep taking for a while”
“Bad quality”
“Vegavero claim in their photo that it is 'MADE IN GERMANY' - that is incorrect”
“the scoop was teeny tiny in comparison”
“Not for an over active mind”
“I dont even know how to accurately measure the daily dose with mistakes as it stands”
“* Taste may not suit everyone despite the mild sweetness”
“This one has zero taste”
Top return reasons
Common questions
- Is glycine powder profitable to sell on Amazon United Kingdom?
- The niche generates £122K/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -28.1%. Flapen's verdict: Skip it (36/100).
- How competitive is the glycine powder niche?
- 5 brands and 7 sellers compete. The top 5 products take 92% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in glycine powder?
- Top complaints mined from reviews: Sleep Quality, Side Effects, Functionality-Overall. The return rate is 0.1%.
- What does it cost to enter the glycine powder niche?
- Listings span £3.97–£18.00; the average listing price is £9.32 (sweet spot $15–$100). The average incumbent carries 697 reviews — the moat a new listing must climb.