---
title: "Vitamin C 100mg — $102K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vitamin-c-100mg"
last_updated: "2026-08-10T03:50:42.420Z"
locale: en
meta:
description: "Niche score 50/100 · $102K/yr market · 85K searches/yr · $15.16 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · $102K/yr market · 85K searches/yr · $15.16 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Vitamin C 100mg — $102K/yr Amazon US Niche (2026) - Flapen"
---
# **vitamin c 100mg**
**Worth a look**
Shows low returns (0.0%), but strong incumbent ratings (4.7★) keeps it on the watch list.
Market size 25Growth 24Conversion 79Competition 54Returns 100Price range 65Avg price 75Brand share 65Review moat 25Quality gap 16
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****7.9%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$15.16**
avg listing price — sweet spot $15–$100
**Brand share**
**Good****66%**
top-5 brand share — brands hold most of the demand
**Price range**
**Good****$4.26–$35.28**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****53%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Okay****$102K**
$102K/yr · 85K searches
**Review moat**
**Bad****4,508.2**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-1.7%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, vitamin c 100mg is a $102K/yr Amazon United States market (85K searches/yr). The top 5 brands hold 66% of demand. Verdict: Worth a look — 50/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin c 100mg market data**
- **Units sold / yr**
- **6K–8K**
- avg 100–250/product
- **Revenue / yr**
- **$91K–$121K**
- units × avg price
- **Conversion rate**
- **7.9%**
- **Avg BSR**
- **#194**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **77%**
- **Out of stock**
- **2.3%**
- **Avg brand age**
- **105 months**
- **Avg seller age**
- **154 days**
## **Competition & brand share**
The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**22 **▼falling
**Sellers**
**645**
**Top-5 brand share**
**66%**
Top 20: 98%
**Top-5 click share**
**53%**
Top 20: 90%
**Open market**
**28%**
- GNC24% - NaturesPlus11% - P Puregen Labs11% - Nature's Bounty11% - Nature Made10% - Pure Encapsulations5%
## **Demand**
Weekly Amazon search volume, last 28 weeks — -1.7% search growth over the last 90 days.
2K1KJan '26Feb '26Mar '26Apr '26May '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/us/health-household/vitamin-c-100mg/trend)
## **Top vitamin c 100mg search terms**
- **vitamin c 100mg**25K/yr+5.8%6.5% conv. - **low dose vitamin c**11K/yr+17.0%4.5% conv. - **vitamin c 100 mg**9K/yr+3.7%8.3% conv. - **gnc vitamin c**12K/yr-27.7%12.0% conv. - **vitamin c 75 mg**7K/yr+12.2%4.7% conv. - **vitamin c low dose**5K/yr+3.0%6.3% conv. - **100 mg vitamin c**4K/yr+11.5%7.8% conv. - **vitamin c 75 mg women**4K/yr+10.9%4.6% conv. - **100mg vitamin c**3K/yr-9.2%6.3% conv. - **gnc vitamin c chewable**3K/yr-80.3%18.6% conv. [**All search terms **](https://flapen.com/research/us/health-household/vitamin-c-100mg/search-terms)
## **Top vitamin c 100mg 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%4%$4K8%$8K12%$12K16%$16K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**GNC Vitamin C 100mg Provides Immune Support Mixed Fruit 360 Servings**GNC**$19.75**4.7★376 rev](https://www.amazon.com/dp/B08FCNMH3T) [2**NaturesPlus Orange Juice Jr. - 180 Chewable Tablets - 100 mg Vitamin C - Immune System Support - Gentle on the Stomach - Vegan Gluten Free - 180 Servings**NaturesPlus**$14.99**4.7★386 rev](https://www.amazon.com/dp/B0001VU472) [3**Puregen Labs Vitamin C 250 MG Supports a Healthy Immune System & Antioxidant Protection | Non-GMO | Gluten Free - 200 Tablets**P Puregen Labs**$8.93**4.7★480 rev](https://www.amazon.com/dp/B0DZKM7DK8) [4**Natures Bounty Vitamin C + Zinc Vitamin Supplement Supports Immune Health 60 mg 60 Tablets**Nature's Bounty**$7.77**4.7★7,591 rev](https://www.amazon.com/dp/B00V4CSJMY) [5**Nature Made Vitamin C 500 mg Tablets for Daily Immune Support Adult Vitamin C Tablets for Immune Support 100 Count 100 Day Supply**Nature Made**$6.15**4.8★8,316 rev](https://www.amazon.com/dp/B018EAPQ38)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Certified Organic Vitamin C Supplement - Whole Food Acerola Vitamin C Immune Support Supplement for Seasonal Wellness with Naturally Occurring Bioflavonoids Polyphenols & Cofactors (1 Month Supply)**PURE CO**$16.44**1,446 rev10mo ago](https://www.amazon.com/dp/B0FQ65JTJW) [**Puregen Labs Vitamin C 250 MG Supports a Healthy Immune System & Antioxidant Protection | Non-GMO | Gluten Free - 200 Tablets**P Puregen Labs**$8.93**480 rev1y ago](https://www.amazon.com/dp/B0DZKM7DK8) [**Pure Encapsulations Liposomal Vitamin C - Immune Support Supplement* - Antioxidant Nourishment - Daily Vitamin - Non-GMO & Gluten Free - 120 Capsules**Pure Encapsulations**$35.28**392 rev2y ago](https://www.amazon.com/dp/B0CQ6FQWCL) [**Bronson Vitamin C 500 mg Immune & Antioxidant Support Non-GMO 250 Tablets**Bronson**$9.79**4,035 rev2y ago](https://www.amazon.com/dp/B0CJ1294X7) [**Amazon Basic Care Vitamin C Supplement Drops Lemon Orange & Grapefruit 140 count (Previously SoundHealth)**Amazon Basic Care**$4.26**2,856 rev4y ago](https://www.amazon.com/dp/B09KC7GWCD)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Nordic Naturals Vitamin C Gummies 250mg Vegan Tart Tangerine - 60 Count**Nordic Naturals**$12.66**4.7★**▲ 176%**](https://www.amazon.com/dp/B00HVGBIBG) [**Life Extension Vitamin C 24-Hour Liposomal Hydrogel Formula absorbs Better Than Standard Vitamin C up to 24 Hours get The Most Out of Your Vitamin C Gluten-Free Non-GMO Vegetarian 60 Tablets**Life Extension**$21.23**4.8★**▲ 115%**](https://www.amazon.com/dp/B09GW7PCFZ) [**Nature Made Vitamin C Gummies 250mg per Serving 150 Count**Nature Made**$9.14**4.8★**▲ 74%**](https://www.amazon.com/dp/B00IOBAK02) [**Bronson Vitamin C 500 mg Immune & Antioxidant Support Non-GMO 250 Tablets**Bronson**$9.79**4.8★**▲ 73%**](https://www.amazon.com/dp/B0CJ1294X7) [**Pure Encapsulations Liposomal Vitamin C - Immune Support Supplement* - Antioxidant Nourishment - Daily Vitamin - Non-GMO & Gluten Free - 120 Capsules**Pure Encapsulations**$35.28**4.8★**▲ 62%**](https://www.amazon.com/dp/B0CQ6FQWCL)
**~~View all trending →~~**
## **What buyers say about vitamin c 100mg**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**19%
*“the quality is consistent”*
**Vitamin**19%
*“Good tasting vitamin”*
**Value For Money**9%
*“Fair price”*
**Taste-Overall**6%
*“Tastes just like an orange”*
**Advertised Vs Actual Product**5%
*“As advertised”*
**Ease Of Chewing/Swallowing**4%
*“easy to chew”*
**Immunity Booster**3%
*“protects my immune system”*
**Dosage**3%
*“Daily dose”*
**Ease Of Use**2%
*“Easy to use”*
**Iron**2%
*“Iron supplement”*
### **What buyers complain about **
**Size-Overall**11%
*“Too big”*
**Taste-Overall**9%
*“Has no taste”*
**Ease Of Chewing/Swallowing**8%
*“Impossible to swallow”*
**Vitamin**7%
*“This vitamin c is terrible”*
**Value For Money**5%
*“Not worth it at their inflated price”*
**Dosage**3%
*“Terrible pills”*
**Smell**3%
*“Rancid Odor”*
**Acid Regulator/Stomach Ache Relief**3%
*“or experience an tummy troubles while taking”*
**Adhesion/Stickiness**2%
*“Stickyyyy”*
**Iron**2%
*“my iron levels were low”*
### **Top return reasons **
**Ease Of Chewing/Swallowing**35%
**Size-Overall**13%
**Vitamin**12%
**Advertised Vs Actual Product**7%
**Dosage**5%
**Iron**3%
**Value For Money**3%
**Product Condition**3%
**Acid Regulator/Stomach Ache Relief**3%
**Joint Pain**3%
## **Common questions**
- **Is vitamin c 100mg profitable to sell on Amazon United States?**
- The niche generates $102K/yr across 30 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -1.7%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the vitamin c 100mg niche?**
- 22 brands and 645 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 66% of demand.
- **What do buyers complain about in vitamin c 100mg?**
- Top complaints mined from reviews: Size-Overall, Taste-Overall, Ease Of Chewing/Swallowing. The return rate is 0.0%.
- **What does it cost to enter the vitamin c 100mg niche?**
- Listings span $4.26–$35.28; the average listing price is $15.16 (sweet spot $15–$100). The average incumbent carries 4,508 reviews — the moat a new listing must climb.
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