Is vitamin c niacinamide serum profitable to sell on Amazon United States?

The niche generates $228K/yr across 8 tracked products. 90-day search growth is -0.2%. Flapen's verdict: Skip it (42/100).

How competitive is the vitamin c niacinamide serum niche?

5 brands and 41 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in vitamin c niacinamide serum?

Top complaints mined from reviews: Smell, Allergies, Skin Health. The return rate is 0.1%.

When does demand for vitamin c niacinamide serum peak?

Demand peaks in Jan–Dec; the busiest month runs 4.3× the quietest.

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

Listings span $5.86–$25.59; the average listing price is $16.09 (sweet spot $15–$100). The average incumbent carries 25,343 reviews — the moat a new listing must climb.

vitamin c niacinamide serum

Skip it

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

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Great8.5%

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

Avg price

Great$16.09

avg listing price — sweet spot $15–$100

Price range

Good$5.86–$25.59

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Market size

Okay$228K

$228K/yr · 167K searches

Growth

Bad-0.2%

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

Review moat

Bad25,343.25

avg incumbent reviews — the moat a new listing must climb

Competition

Bad89%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, vitamin c niacinamide serum is a $228K/yr Amazon United States market (167K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Dec. Verdict: Skip it — 42/100.

Data updated Jul 16, 2026 · scored weekly · How we score niches

vitamin c niacinamide serum market data

Units sold / yr: 15K–20K; avg 2,000–2,500/product
Revenue / yr: $241K–$322K; units × avg price
Conversion rate: 8.5%
Avg BSR: #182
Page quality: 0%
Prime: 100%
Sponsored: 88%
Out of stock: 0.0%
Avg brand age: 51 months
Avg seller age: 121 days

Competition & brand share

The top 5 products capture 89% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

89%

Top 20: 100%

Open market

Cetaphil65%
Eva Naturals16%
The Ordinary8%
MEDIHEAL7%
TruSkin4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -0.2% search growth over the last 90 days.

Peak months: Jan, Dec · busiest ÷ quietest = 4.3×

Open Trend

Top vitamin c niacinamide serum search terms

cetaphil vitamin c serum47K/yr -4.3%12.4% conv.
eva naturals22K/yr -11.4%1.4% conv.
vitamin c niacinamide serum14K/yr +15.2%1.5% conv.
cetaphil vitamin c serum for face12K/yr -10.0%12.6% conv.
vitamin c and niacinamide serum9K/yr +20.0%1.3% conv.
cetaphil vitamin c8K/yr +10.4%9.3% conv.
niacinamide and vitamin c serum8K/yr +24.0%0.8% conv.
mediheal vitamin c7K/yr +25.1%6.5% conv.
eva naturals vitamin c serum9K/yr -12.0%10.7% conv.
niacinamide vitamin c6K/yr +3.1%1.6% conv.

All search terms

Top vitamin c niacinamide 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 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Cetaphil Vitamin C Serum Visibly Reduces Look of Dark Spots and Hyperpigmentation Formulated with Niacinamide Designed for Sensitive Skin Fragrance Free Dermatologist Tested 1oz

Cetaphil$17.114.5★1,057 rev

Eva Naturals Vitamin C Serum for Face Anti Aging Dark Spot Remover & Corrector with Retinol Hyaluronic Acid Niacinamide & Salicylic Acid Brightening 1 fl oz

Eva Naturals$15.394.3★61,726 rev

MEDIHEAL Vitamin C Brightening Serum (1.35 fl oz 1 Pack) - Tone-Texture-Glow Care Manage Skin with Vitamin C Niacinamide Hyaluronic Acid

MEDIHEAL$13.514.5★857 rev

Cetaphil Face Serum Healthy Radiance Antioxidant-C Serum Visibly Reduces Look of Dark Spots and Hyperpigmentation Designed for Sensitive Skin Hypoallergenic Fragrance Free 1 oz

Cetaphil$15.144.1★1,562 rev

The Ordinary Multi-Antioxidant Radiance Serum Vitamin C Serum For Face Brighten & Protect Skin Boosts Glow & Shields Against Environmental Stressors 1 Fl Oz

The Ordinary$13.674.5★1,032 rev

Newest

by launch date

The Ordinary Multi-Antioxidant Radiance Serum Vitamin C Serum For Face Brighten & Protect Skin Boosts Glow & Shields Against Environmental Stressors 1 Fl Oz

The Ordinary$13.671,032 rev

1y ago

Cetaphil Vitamin C Serum Visibly Reduces Look of Dark Spots and Hyperpigmentation Formulated with Niacinamide Designed for Sensitive Skin Fragrance Free Dermatologist Tested 1oz

Cetaphil$17.111,057 rev

2y ago

MEDIHEAL Vitamin C Brightening Serum (1.35 fl oz 1 Pack) - Tone-Texture-Glow Care Manage Skin with Vitamin C Niacinamide Hyaluronic Acid

MEDIHEAL$13.51857 rev

2y ago

Cetaphil Face Serum Healthy Radiance Antioxidant-C Serum Visibly Reduces Look of Dark Spots and Hyperpigmentation Designed for Sensitive Skin Hypoallergenic Fragrance Free 1 oz

Cetaphil$15.141,562 rev

5y ago

Eva Naturals Vitamin C Serum Plus Facial Serum with Hyaluronic Acid Niacinamide Retinol and Salicylic Acid Hydrating and Smoothing Skin Formula 2 oz

Eva Naturals$25.5961,726 rev

5y ago

What buyers say about vitamin c niacinamide serum

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

What buyers love

Suitability Combination Skin19%

“super helpful for textured skin”

Quality-Overall15%

“Plus, its very affordable for the quality you get”

Value For Money10%

“reasonable price”

Moist/Dry6%

“dries fast”

Soft Feel6%

“Skin feels smooth”

Absorbency4%

“Absorbs nicely”

Suitability Oily Skin4%

“Works well for oily skin”

Suitability Dry Skin3%

“it feels nice on my dry”

Brightness/Shine/Glow3%

“Gives you a natural glow”

Symptom Reduction3%

“It helps with dark spots”

What buyers complain about

Smell13%

“Smells like fish”

Allergies13%

“Irritated my skin”

Skin Health9%

“it burned my face”

Functionality-Overall7%

“Non effective”

Adhesion/Stickiness4%

“it's really sticky”

Moist/Dry4%

“it isn't moisturizing”

Suitability Dry Skin3%

“My face became more dry”

Size-Overall3%

“Wrong size twice”

Symptom Reduction2%

“for pore minimizing, I dont see much improvement”

Durability2%

“break out worse then ever”

Top return reasons

Smell20%

Advertised Vs Actual Product14%

Functionality-Overall11%

Value For Money6%

Skin Health4%

Product Condition4%

Moist/Dry3%

Ingredients-Overall3%