---
title: "Vitamin C Niacinamide Serum — $228K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/beauty-personal-care/vitamin-c-niacinamide-serum"
last_updated: "2026-08-09T04:45:19.097Z"
locale: en
meta:
description: "Niche score 42/100 · $228K/yr market · 167K searches/yr · $16.09 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 42/100 · $228K/yr market · 167K searches/yr · $16.09 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Vitamin C Niacinamide Serum — $228K/yr Amazon US Niche (2026) - Flapen"
---
# **vitamin c niacinamide serum**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 43Growth 25Conversion 81Competition 9Returns 99Price range 54Avg price 78Brand share 0Review moat 13Quality gap 53
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****8.5%**
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**
**Good****4.4★**
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**
**Bad****25,343.25**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****89%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
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 ~~](https://flapen.com/research/methodology)
## **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**
**41**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**89%**
Top 20: 100%
**Open market**
**0%**
- 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.
18K13KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Dec · busiest ÷ quietest = 4.3×
[**Open Trend **](https://flapen.com/research/us/beauty-personal-care/vitamin-c-niacinamide-serum/trend)
## **Top vitamin c niacinamide serum search terms**
- **cetaphil vitamin c serum**47K/yr-4.3%12.4% conv. - **eva naturals**22K/yr-11.4%1.4% conv. - **vitamin c niacinamide serum**14K/yr+15.2%1.5% conv. - **cetaphil vitamin c serum for face**12K/yr-10.0%12.6% conv. - **vitamin c and niacinamide serum**9K/yr+20.0%1.3% conv. - **cetaphil vitamin c**8K/yr+10.4%9.3% conv. - **niacinamide and vitamin c serum**8K/yr+24.0%0.8% conv. - **mediheal vitamin c**7K/yr+25.1%6.5% conv. - **eva naturals vitamin c serum**9K/yr-12.0%10.7% conv. - **niacinamide vitamin c**6K/yr+3.1%1.6% conv. [**All search terms **](https://flapen.com/research/us/beauty-personal-care/vitamin-c-niacinamide-serum/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.
0%20%$46K40%$91K60%$137K80%$182K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**$17.11**4.5★1,057 rev](https://www.amazon.com/dp/B0CZDNLBK6) [2**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**$15.39**4.3★61,726 rev](https://www.amazon.com/dp/B01BT02Q88) [3**MEDIHEAL Vitamin C Brightening Serum (1.35 fl oz 1 Pack) - Tone-Texture-Glow Care Manage Skin with Vitamin C Niacinamide Hyaluronic Acid**MEDIHEAL**$13.51**4.5★857 rev](https://www.amazon.com/dp/B0CCD7GJPR) [4**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**$15.14**4.1★1,562 rev](https://www.amazon.com/dp/B093VXTS91) [5**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**$13.67**4.5★1,032 rev](https://www.amazon.com/dp/B0F2G7ZYLP)
**~~View all top sellers →~~**
### **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**$13.67**1,032 rev1y ago](https://www.amazon.com/dp/B0F2G7ZYLP) [**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**$17.11**1,057 rev2y ago](https://www.amazon.com/dp/B0CZDNLBK6) [**MEDIHEAL Vitamin C Brightening Serum (1.35 fl oz 1 Pack) - Tone-Texture-Glow Care Manage Skin with Vitamin C Niacinamide Hyaluronic Acid**MEDIHEAL**$13.51**857 rev2y ago](https://www.amazon.com/dp/B0CCD7GJPR) [**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**$15.14**1,562 rev5y ago](https://www.amazon.com/dp/B093VXTS91) [**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**$25.59**61,726 rev5y ago](https://www.amazon.com/dp/B08TQM1F9G)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$25.59**4.3★**▲ 120%**](https://www.amazon.com/dp/B08TQM1F9G) [**TruSkin Vitamin C Super Serum for Face - Five Skin Benefits in One Serum with Vitamin C Retinol Niacinamide Hyaluronic Acid & Squalane - Brighten Firm & Smooth the Look of Skin - 1 fl oz**TruSkin**$22.46**4.5★**▲ 37%**](https://www.amazon.com/dp/B01KMSTCWG) [**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**$13.67**4.5★**▲ 33%**](https://www.amazon.com/dp/B0F2G7ZYLP) [**MEDIHEAL Vitamin C Brightening Serum (1.35 fl oz 1 Pack) - Tone-Texture-Glow Care Manage Skin with Vitamin C Niacinamide Hyaluronic Acid**MEDIHEAL**$13.51**4.5★**— 9%**](https://www.amazon.com/dp/B0CCD7GJPR) [**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**$17.11**4.5★**— 1%**](https://www.amazon.com/dp/B0CZDNLBK6)
**~~View all trending →~~**
## **What buyers say about vitamin c niacinamide serum**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Suitability Combination Skin**19%
*“super helpful for textured skin”*
**Quality-Overall**15%
*“Plus, its very affordable for the quality you get”*
**Value For Money**10%
*“reasonable price”*
**Moist/Dry**6%
*“dries fast”*
**Soft Feel**6%
*“Skin feels smooth”*
**Absorbency**4%
*“Absorbs nicely”*
**Suitability Oily Skin**4%
*“Works well for oily skin”*
**Suitability Dry Skin**3%
*“it feels nice on my dry”*
**Brightness/Shine/Glow**3%
*“Gives you a natural glow”*
**Symptom Reduction**3%
*“It helps with dark spots”*
### **What buyers complain about **
**Smell**13%
*“Smells like fish”*
**Allergies**13%
*“Irritated my skin”*
**Skin Health**9%
*“it burned my face”*
**Functionality-Overall**7%
*“Non effective”*
**Adhesion/Stickiness**4%
*“it's really sticky”*
**Moist/Dry**4%
*“it isn't moisturizing”*
**Suitability Dry Skin**3%
*“My face became more dry”*
**Size-Overall**3%
*“Wrong size twice”*
**Symptom Reduction**2%
*“for pore minimizing, I dont see much improvement”*
**Durability**2%
*“break out worse then ever”*
### **Top return reasons **
**Smell**20%
**Advertised Vs Actual Product**14%
**Functionality-Overall**11%
**Value For Money**6%
**Skin Health**4%
**Product Condition**4%
**Moist/Dry**3%
**Ingredients-Overall**3%
**Size-Overall**3%
**Color**3%
## **Common questions**
- **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.
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