Is korean vitamin c serum profitable to sell on Amazon United Kingdom?

The niche generates £98K/yr across 5 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +21.5%. Flapen's verdict: Skip it (42/100).

How competitive is the korean vitamin c serum niche?

4 brands and 81 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in korean vitamin c serum?

Top complaints mined from reviews: Allergies, Adhesion/Stickiness, Skin Health. The return rate is 0.0%.

When does demand for korean vitamin c serum peak?

Demand peaks in Jul; the busiest month runs 1.7× the quietest.

What does it cost to enter the korean vitamin c serum niche?

Listings span £10.81–£18.77; the average listing price is £14.23 (sweet spot $15–$100). The average incumbent carries 3,695 reviews — the moat a new listing must climb.

korean vitamin c serum

Skip it

A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Great8.9%

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

Avg price

Good£14.23

avg listing price — sweet spot $15–$100

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Growth

Good+21.5%

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

Price range

Okay£10.81–£18.77

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

Review moat

Okay3,694.6

avg incumbent reviews — the moat a new listing must climb

Market size

Bad£98K

£98K/yr · 77K searches

Competition

Bad100%

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, korean vitamin c serum is a £98K/yr Amazon United Kingdom market (77K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jul. Verdict: Skip it — 42/100.

Data updated Jul 21, 2026 · scored weekly · How we score niches

korean vitamin c serum market data

Units sold / yr: 6K–8K; avg 750–1,000/product
Revenue / yr: £85K–£114K; units × avg price
Conversion rate: 8.9%
Avg BSR: #241
Page quality: 0%
Prime: 100%
Sponsored: 60%
Out of stock: 6.8%
Avg brand age: 43 months
Avg seller age: 144 days

Competition & brand share

The top 5 products capture 100% 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

100%

Top 20: 100%

Open market

Geek & Gorgeous73%
COSRX14%
GOODAL9%
medicube4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +21.5% search growth over the last 90 days.

Peak months: Jul · busiest ÷ quietest = 1.7×

Open Trend

Top korean vitamin c serum search terms

geek and gorgeous vitamin c22K/yr +46.8%16.5% conv.
vitamin c serum korean15K/yr +7.1%0.9% conv.
geek & gorgeous c-glow7K/yr +162.3%14.4% conv.
korean vitamin c serum9K/yr -2.6%0.8% conv.
cosrx vitamin c serum 236K/yr -2.1%6.4% conv.
cosrx vitamin c8K/yr -15.6%4.8% conv.
goodal vitamin c serum5K/yr -15.0%5.4% conv.
goodal3K/yr -12.2%0.7% conv.
green tangerine vitamin c serum2K/yr -45.9%5.2% conv.

All search terms

Top korean vitamin c serum 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 5 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Geek & Gorgeous 101 C-Glow - 15% Vitamin C Serum super-light + Ferulic acid & vitamin E gives environmental protection boost collagen & evens skin tone - all skin types 30ml

Geek & Gorgeous£10.814.3★2,007 rev

COSRX Advanced Pure Vitamin C 23 Serum 20 ml (Renewal Edition) Korean Vitamin C Serum with Vitamin E & Glutathione for Fine Lines Uneven Skin Tone & Dull Skin Korean Skin Care

COSRX£18.064.4★773 rev

goodal Green tangerine vita C dark spot serum 40ml

GOODAL£18.774.4★1,035 rev

Geek & Gorgeous Power Peptides Serum Anti-aging serum with multi-peptides to promote firmer skin reduce wrinkles and improve elasticity. Enhances skins natural renewal process 30 ml.

Geek & Gorgeous£10.814.5★1,017 rev

medicube Deep Vitamin C Golden Capsule Face Moisturiser - Liposome Capsules For Wrinkles Skin Radiance - Transparent Gel for Glow Hydration - Korean Skin Care 1.94 oz

medicube£12.714.5★13,641 rev

Newest

by launch date

COSRX Advanced Pure Vitamin C 23 Serum 20 ml (Renewal Edition) Korean Vitamin C Serum with Vitamin E & Glutathione for Fine Lines Uneven Skin Tone & Dull Skin Korean Skin Care

COSRX£18.06773 rev

6mo ago

medicube Deep Vitamin C Golden Capsule Face Moisturiser - Liposome Capsules For Wrinkles Skin Radiance - Transparent Gel for Glow Hydration - Korean Skin Care 1.94 oz

medicube£12.7113,641 rev

1y ago

Geek & Gorgeous Power Peptides Serum Anti-aging serum with multi-peptides to promote firmer skin reduce wrinkles and improve elasticity. Enhances skins natural renewal process 30 ml.

Geek & Gorgeous£10.811,017 rev

2y ago

goodal Green tangerine vita C dark spot serum 40ml

GOODAL£18.771,035 rev

2y ago

Geek & Gorgeous 101 C-Glow - 15% Vitamin C Serum super-light + Ferulic acid & vitamin E gives environmental protection boost collagen & evens skin tone - all skin types 30ml

Geek & Gorgeous£10.812,007 rev

3y ago

What buyers say about korean vitamin c serum

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

What buyers love

Quality-Overall17%

“Better than expensive brands”

Moist/Dry17%

“Good hydration”

Suitability Combination Skin12%

“Beautiful on my skin”

Brightness/Shine/Glow8%

“Glow”

Value For Money8%

“Good price”

Soft Feel8%

“Soft and smooth skin”

Suitability Dry Skin5%

“If you have dry skin and love products that make your skin look glowing, smoother, and well-nourished, I would 100% recommend this cream”

Smell3%

“The smell is divine”

Absorbency3%

“Absorbs nicely”

Oily/Greasy2%

“Works really well, absorbs well, not too oily afterwards”

What buyers complain about

Allergies18%

“Ruined my skin”

Adhesion/Stickiness11%

“Sticky skin”

Skin Health6%

“Leaves the skin super sticky after applying”

Absorbency5%

“Not absorbing well”

Thickness3%

“Consistency is a bit thick”

Quality-Overall3%

“Thats why very cheap”

Size-Overall3%

“Bit of citrus small”

Sensitivity-Overall3%

“I have sensitive skin being a red head which is also prone to dehydration”

Suitability Dry Skin3%

“It makes my skin more dry”

Value For Money2%

“So bad I spent such amount on what didnt give me value”

Top return reasons

Leak-Proof36%

Oily/Greasy14%

Functionality-Overall14%

Smell11%

Dilute/Watery7%

Value For Money7%

Hard Feel7%

Product Condition4%

Common questions

Is korean vitamin c serum profitable to sell on Amazon United Kingdom?: The niche generates £98K/yr across 5 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +21.5%. Flapen's verdict: Skip it (42/100).
How competitive is the korean vitamin c serum niche?: 4 brands and 81 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in korean vitamin c serum?: Top complaints mined from reviews: Allergies, Adhesion/Stickiness, Skin Health. The return rate is 0.0%.
When does demand for korean vitamin c serum peak?: Demand peaks in Jul; the busiest month runs 1.7× the quietest.
What does it cost to enter the korean vitamin c serum niche?: Listings span £10.81–£18.77; the average listing price is £14.23 (sweet spot $15–$100). The average incumbent carries 3,695 reviews — the moat a new listing must climb.