Is l theanine profitable to sell on Amazon Singapore?

The niche generates $9K/yr across 6 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +1.9%. Flapen's verdict: Skip it (36/100).

How competitive is the l theanine niche?

4 brands and 13 sellers compete. The top 5 products take 97% of clicks and top 5 brands hold 100% of demand.

What does it cost to enter the l theanine niche?

Listings span $17.79–$88.23; the average listing price is $35.25 (sweet spot $15–$100). The average incumbent carries 1,292 reviews — the moat a new listing must climb.

l theanine

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$35.25

avg listing price — sweet spot $15–$100

Price range

Incredible$17.79–$88.23

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

Conversion

Good5.9%

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

Review moat

Good1,292

avg incumbent reviews — the moat a new listing must climb

Growth

Okay+1.9%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad97%

top-5 click share — a locked-up shelf

Market size

Bad$9K

$9K/yr · 4K searches

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon Singapore niche tracking, l theanine is a $9K/yr Amazon Singapore market (4K 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

l theanine market data

Units sold / yr: 500–750; avg 0–100/product
Revenue / yr: $18K–$26K; units × avg price
Conversion rate: 5.9%
Avg BSR: #270
Page quality: 0%
Prime: 83%
Sponsored: 17%
Out of stock: 9.0%
Avg brand age: 75 months
Avg seller age: 0 days

Competition & brand share

The top 5 products capture 97% of clicks — a locked-up shelf that new listings rarely crack.

Brands

4 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

97%

Top 20: 100%

Open market

Now Foods55%
Horbäach33%
THORNE9%
365 by Whole Foods Market3%

Demand

Weekly Amazon search volume, last 46 weeks — +1.9% search growth over the last 90 days.

Open Trend

Top l theanine search terms

l theanine2K/yr +7.0%8.7% conv.
l-theanine1K/yr +0.9%5.9% conv.
theanine430/yr -15.7%4.4% conv.

All search terms

Top l theanine 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★)

All 6 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Now Foods L-Theanine Double Strength 200 mg 60 Count

Now Foods$20.174.6★2,410 rev

L Theanine 200mg | 400 Capsules | Value Size | Non-GMO Gluten Free Supplement | by Horbaach

Horbäach$31.194.7★636 rev

Thorne Theanine - 200mg of L-Theanine - Support a Healthy Stress Response Relaxation and Focus - Increases Brain Alpha-Wave Production - 90 Capsules

THORNE$88.234.7★763 rev

L Theanine 400mg | 120 Capsules | Non-GMO & Gluten Free | by Horbaach

Horbäach$17.794.6★1,849 rev

L Theanine 400mg | 400 Capsules Max Size | Non-GMO & Gluten Free | by Horbaach

Horbäach$34.144.6★2,092 rev

Newest

by launch date

365 by Whole Foods Market L-Theanine 100mg Vegan 60 Count

365 by Whole Foods Market$19.962 rev

10mo ago

Thorne Theanine - 200mg of L-Theanine - Support a Healthy Stress Response Relaxation and Focus - Increases Brain Alpha-Wave Production - 90 Capsules

THORNE$88.23763 rev

3y ago

L Theanine 200mg | 400 Capsules | Value Size | Non-GMO Gluten Free Supplement | by Horbaach

Horbäach$31.19636 rev

4y ago

L Theanine 400mg | 120 Capsules | Non-GMO & Gluten Free | by Horbaach

Horbäach$17.791,849 rev

6y ago