Is leucin profitable to sell on Amazon Germany?

The niche generates €47K/yr across 28 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is -12.6%. Flapen's verdict: Worth a look (57/100).

How competitive is the leucin niche?

19 brands and 23 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 60% of demand.

What do buyers complain about in leucin?

Top complaints mined from reviews: Geruch, Gesamtgröße, Dosierung. The return rate is 0.1%.

What does it cost to enter the leucin niche?

Listings span €9.59–€32.32; the average listing price is €18.72 (sweet spot $15–$100). The average incumbent carries 210 reviews — the moat a new listing must climb.

leucin

Worth a look

Shows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Review moat

Great210.18

avg incumbent reviews — the moat a new listing must climb

Avg price

Great€18.72

avg listing price — sweet spot $15–$100

Price range

Great€9.59–€32.32

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

Brand share

Good60%

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

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Conversion

Good5.8%

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

Competition

Good50%

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

Growth

Bad-12.6%

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

Market size

Bad€47K

€47K/yr · 43K searches

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon Germany niche tracking, leucin is a €47K/yr Amazon Germany market (43K searches/yr). The top 5 brands hold 60% of demand. Verdict: Worth a look — 57/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

leucin market data

Units sold / yr: 3K–3K; avg 0–100/product
Revenue / yr: €47K–€56K; units × avg price
Conversion rate: 5.8%
Avg BSR: #64
Page quality: 0%
Prime: 71%
Sponsored: 93%
Out of stock: 5.2%
Avg brand age: 59 months
Avg seller age: 184 days

Competition & brand share

The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.

Brands

19 flat

Sellers

Top-5 brand share

60%

Top 20: 100%

Top-5 click share

50%

Top 20: 93%

Open market

33%

GymBeam16%
GEN GERMAN ELITE NUTRITION14%
vitalundfitmit10012%
Bulk9%
Bonemis9%
Bodylab247%

Demand

Weekly Amazon search volume, last 50 weeks — -12.6% search growth over the last 90 days.

Open Trend

Top leucin search terms

leucin22K/yr -17.6%4.7% conv.
leucin pulver8K/yr +1.6%7.4% conv.
leucin kapseln7K/yr -8.0%4.2% conv.
leucine3K/yr -4.1%3.8% conv.
l leucin3K/yr -26.6%5.8% conv.

All search terms

Top leucin 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

GymBeam L-Leucin (Pulver) - Essentielle Aminosäure L-Leucin-Pulver für Bodybuilder Kraftsportler & Ausdauersportler gut löslich ideal für Wasser & andere Getränke (250 g)

GymBeam€9.594.2★44 rev

Leucin - 500 g Pulver - Hohe Reinheit - Premium Rohstoff: Natürliches L-Leucin fermentiert - Aminosäure - Ohne unerwünschte Zusätze vegan

GEN GERMAN ELITE NUTRITION€22.583.8★161 rev

Bulk L-Leucin Pulver 500 g 166 Portionen Verpackung Kann Variieren

Bulk€17.264.4★215 rev

L-Leucin - 250 Kapseln - hochdosiert - aus pflanzlicher Fermentation - gentechnikfrei - vegan - ohne unnötige Zusätze - Deutsche Herstellung

vitalundfitmit100€15.004.5★10 rev

Bonemis L-Leucin (Aminosäure) vegan 500 g im Beutel Premiumqualität ohne Zusatzstoffe

Bonemis€16.734.5★21 rev

Newest

by launch date

BCAA Kapseln 300 GIGA CAPS hochdosiert mit 8000mg B.C.A.A. 2:1:1 Verhältnis L-Leucin L-Isoleucin & L-Valin 1000mg pro Kapsel produziert in Deutschland - Alternative zu Tabletten

Gym Nutrition€16.6433 rev

5mo ago

INGREO€17.651 rev

6mo ago

BCAA Tabletten 365 Stück Essenzielle Aminosäuren aus Leucin Isoleucin & Valin (2:1:1) Alternative zu Kapseln Vegan Produziert in Deutschland

Gym Nutrition€13.4967 rev

7mo ago

BCAA 8:1:1 ULTRA CAPS - 320 Kapseln - 1100 mg pro Kapsel - Hoher L-Leucin Anteil - L-Isoleucin & L-Valin - Essenzielle Aminosäuren - BCAA Kapseln

GEN GERMAN ELITE NUTRITION€21.27439 rev

8mo ago

L-Leucin - 250 Kapseln - hochdosiert - aus pflanzlicher Fermentation - gentechnikfrei - vegan - ohne unnötige Zusätze - Deutsche Herstellung

vitalundfitmit100€15.0010 rev

10mo ago

What buyers say about leucin

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

What buyers love

Qualität insgesamt12%

“Super Produkt”

Ernährungs Gehalt8%

“Super Supplement”

Dosierung8%

“Hoch dosiert”

Preis-Leistungs-Verhältnis7%

“Preisleistung ist fair”

beworben Vs Tatsächliches Produkt6%

“Hält was es verspricht”

Benutzerfreundlichkeit5%

“sich diese gut öffnen”

Einfaches Kauen/Schlucken4%

“Lassen sich gut Schlucken”

Inhaltsstoffe – insgesamt4%

“Außerdem wirkt das Produkt insgesamt „clean“, ohne unnötige Zusätze.”

Vegan/Biologisch4%

“- Vegan”

Lokal hergestellt4%

“Produktion in Deutschland.”

What buyers complain about

Geruch11%

“stinken nach Fisch”

Gesamtgröße8%

“Verhältnismäßig große Tabletten”

Dosierung7%

“Ich werd die Dose in den Müll werfen oder auflösen”

Einfaches Kauen/Schlucken5%

“Das Schlucken dieser Presslinge macht keinen Spaß, es sind keine Kapseln”

Geschmack5%

“Tabletten statt Pulver → kein Geschmack, kein Shaker nötig”

Qualität insgesamt4%

“habe keinerlei Vorteile, ein Produkt positiv zu bewerten.”

Allergien3%

“verursachen bei mir Brechreiz”

Benutzerfreundlichkeit2%

“unmöglich einzunehmen”

Feucht/Trocken2%

“offensichtlich feucht gelagert worden.”

Säureregulator/Linderung von Magenschmerzen1%

“Löst sich nicht auf und starke Bauchschmerzen und Übelkeit bis hin zu Durchfall”

Common questions

Is leucin profitable to sell on Amazon Germany?: The niche generates €47K/yr across 28 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is -12.6%. Flapen's verdict: Worth a look (57/100).
How competitive is the leucin niche?: 19 brands and 23 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 60% of demand.
What do buyers complain about in leucin?: Top complaints mined from reviews: Geruch, Gesamtgröße, Dosierung. The return rate is 0.1%.
What does it cost to enter the leucin niche?: Listings span €9.59–€32.32; the average listing price is €18.72 (sweet spot $15–$100). The average incumbent carries 210 reviews — the moat a new listing must climb.