---
title: "Immune C — $18K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/health-household/immune-c"
last_updated: "2026-08-12T09:37:12.981Z"
locale: en
meta:
description: "Amazon product research for immune c: $18K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for immune c: $18K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Immune C — $18K/mo Amazon US Product Research (2026)"
---
# **Immune C**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 42Growth 18Conversion 89Competition 15Returns 100Price range 66Avg price 85Brand share 0Review moat 22Quality gap 16
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****10.5%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$19.14**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$8.57–$27.51**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Okay****$220K**
$220K/yr · 109K searches
**Review moat**
**Bad****8,817.64**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-13.5%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****82%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
## **Is immune c profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, immune c is a $220K/yr Amazon United States market (109K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Skip it — 41/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **immune c market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **15K–20K**
- avg 1,250–1,500/product
- **Revenue / yr**
- **$287K–$383K**
- units × avg price
- **Conversion rate**
- **10.5%**
- **Avg BSR**
- **#100**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **91%**
- **Out of stock**
- **4.5%**
- **Avg brand age**
- **76 months**
- **Avg seller age**
- **149 days**
## **Competition: brands, sellers & click share**
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **▼falling
**Sellers**
**67**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**82%**
Top 20: 100%
**Open market**
**0%**
- Emergen-C79% - KAPPA NUTRITION15% - Country Farms4% - Nature's Bounty2%
## **immune c demand & seasonality**
Weekly Amazon search volume, last 100 weeks — -13.5% search growth over the last 90 days.
2K2KHoliday '24Spike '25Prime Day '25Holiday '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 2.8×
[**Open Trend **](https://flapen.com/research/us/health-household/immune-c/trend)
## **Top immune c search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **emergen c raspberry**15K/yr-6.7%9.9% conv. - **immunity powder**10K/yr+24.2%0.6% conv. - **emergen c raspberry flavor**5K/yr+63.2%23.2% conv. - **immune c**14K/yr-35.1%9.1% conv. - **immunity drink mix**6K/yr+44.6%0.4% conv. - **raspberry emergency c packets**9K/yr-32.9%23.9% conv. - **immune defense powder**5K/yr+66.6%2.2% conv. - **immunity supplement powder**4K/yr+78.5%0.0% conv. - **immune c plus**7K/yr-34.4%18.3% conv. - **immunity packets**5K/yr-3.0%1.4% conv. [**All search terms **](https://flapen.com/research/us/health-household/immune-c/search-terms)
## **Top immune c products & what they sell for**
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$22K20%$44K30%$66K40%$88K1K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 11 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Emergen-C Vitamin C 1000mg Immune Support Powder Raspberry 30 Packets**Emergen-C**$12.03**4.8★19,561 rev](https://www.amazon.com/dp/B0009RF8KG) [2**Emergen-C Immune+ Triple Action Immune Support Powder BetaVia (R) 1000mg Vitamin C B Vitamins Vitamin D and Antioxidants Raspberry Back to School Essentials 30 Count**Emergen-C**$12.89**4.8★16,184 rev](https://www.amazon.com/dp/B00ND99HY0) [3**Emergen-C Vitamin C 1000mg Immune Support Powder Raspberry 60 Packets**Emergen-C**$25.60**4.8★7,590 rev](https://www.amazon.com/dp/B07CNQ6TTN) [4**KAPPA NUTRITION Immune C Plus 14 in 1 Advanced Complex | 1 000 mg Non-Acidic Vitamin C + Quercetin + Vitamin D3 5 000 IU + Vitamin K2 MK-7 + Zinc Selenium & Copper | 120 Capsules**KAPPA NUTRITION**$27.51**4.7★4,044 rev](https://www.amazon.com/dp/B0CJGXRJ5H) [5**Emergen-C Vitamin C 1000mg Immune Support Raspberry Lemonade 36 Packets**Emergen-C**$23.93**4.7★1,027 rev](https://www.amazon.com/dp/B0CX8Q4MHK)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Country Farms Immune Defense Superfoods Immune Support Supplement Vitamin C with Black Elderberry Echinacea Turmeric Supports Hydration with Probiotics and Prebiotics Berry Flavor 60 Servings**Country Farms**$20.39**1,807 rev1y ago](https://www.amazon.com/dp/B0DXVZCG63) [**Emergen-C Vitamin C 1000mg Immune Support Raspberry Lemonade 36 Packets**Emergen-C**$23.93**1,027 rev2y ago](https://www.amazon.com/dp/B0CX8Q4MHK) [**KAPPA NUTRITION Immune C Plus 14 in 1 Advanced Complex | 1 000 mg Non-Acidic Vitamin C + Quercetin + Vitamin D3 5 000 IU + Vitamin K2 MK-7 + Zinc Selenium & Copper | 120 Capsules**KAPPA NUTRITION**$27.51**4,044 rev2y ago](https://www.amazon.com/dp/B0CJGXRJ5H) [**Natures Bounty Immune 24 Hour + The only Vitamin C with 24 Hour Immune Support from Ester-C 1000 mg Vitamin C D & Zinc Gluten Free Rapid Release Softgels 2 Softgels per Day 50 Count**Nature's Bounty**$8.57**5,561 rev4y ago](https://www.amazon.com/dp/B08KHZQTML) [**KAPPA NUTRITION Immune C Plus 14 in 1 Advanced Complex | 1 000 mg Non-Acidic Vitamin C + Quercetin + Vitamin D3 5 000 IU + Vitamin K2 MK-7 + Zinc Selenium & Copper | 60 Capsules**KAPPA NUTRITION**$16.67**4,044 rev5y ago](https://www.amazon.com/dp/B0D5W6BQQL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Country Farms Immune Defense Superfoods Immune Support Supplement Vitamin C with Black Elderberry Echinacea Turmeric Supports Hydration with Probiotics and Prebiotics Berry Flavor 60 Servings**Country Farms**$20.39**4.5★**▲ 239%**](https://www.amazon.com/dp/B0DXVZCG63) [**Emergen-C Vitamin C 1000mg Immune Support Raspberry Lemonade 36 Packets**Emergen-C**$23.93**4.7★**▲ 86%**](https://www.amazon.com/dp/B0CX8Q4MHK) [**Emergen-C Vitamin C 1000mg Immune Support Powder Raspberry 60 Packets**Emergen-C**$25.60**4.8★**▲ 16%**](https://www.amazon.com/dp/B07CNQ6TTN) [**KAPPA NUTRITION Immune C Plus 14 in 1 Advanced Complex | 1 000 mg Non-Acidic Vitamin C + Quercetin + Vitamin D3 5 000 IU + Vitamin K2 MK-7 + Zinc Selenium & Copper | 120 Capsules**KAPPA NUTRITION**$27.51**4.7★**▲ 14%**](https://www.amazon.com/dp/B0CJGXRJ5H) [**KAPPA NUTRITION Immune C Plus 14 in 1 Advanced Complex | 1 000 mg Non-Acidic Vitamin C + Quercetin + Vitamin D3 5 000 IU + Vitamin K2 MK-7 + Zinc Selenium & Copper | 90 Capsules**KAPPA NUTRITION**$22.01**4.7★**— 10%**](https://www.amazon.com/dp/B08NZ5ZW5Q)
**~~View all trending →~~**
## **What reviews say buyers love and hate about immune c**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Taste-Overall**12%
*“The taste is great- fresh”*
**Flavor**10%
*“the flavor strength is just right”*
**Vitamin**10%
*“contains a lot of good vitamins”*
**Quality-Overall**9%
*“Good product, Part of my Daily Regimen”*
**Immunity Booster**9%
*“Helps to boost my immune system”*
**Cold Relief**8%
*“helps me get through cold”*
**Value For Money**4%
*“worth the money”*
**Efficiency**4%
*“Works well”*
**Solubility**3%
*“It mixes well”*
**Ease Of Use**3%
*“It is super easy to make”*
### **What buyers complain about **
**Taste-Overall**10%
*“Tastes terrible”*
**Size-Overall**9%
*“The gel caps are quite large”*
**Flavor**5%
*“I saw the berry flavor. not sold in stores by me”*
**Vitamin**5%
*“I hate taking vitamin c shots because they were always the nasty orange ones”*
**Side Effects**4%
*“Made me feel like I was going to throw up”*
**Value For Money**3%
*“I find this product a little expensive”*
**Quality-Overall**3%
*“Something is wrong with the quality control which makes me nervous about using any of the other packets in the box”*
**Hard Feel**3%
*“Product was hard as rock”*
**Advertised Vs Actual Product**3%
*“False advertising”*
**Moist/Dry**3%
*“It was humid”*
### **Top return reasons **
**Acid Regulator/Stomach Ache Relief**50%
**Taste-Overall**50%
## **Common immune c questions**
- **Is immune c profitable to sell on Amazon United States?**
- The niche generates $220K/yr across 11 tracked products. 90-day search growth is -13.5%. Flapen's verdict: Skip it (41/100).
- **How competitive is the immune c niche?**
- 4 brands and 67 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in immune c?**
- Top complaints mined from reviews: Taste-Overall, Size-Overall, Flavor. The return rate is 0.0%.
- **When does demand for immune c peak?**
- Demand peaks in Apr–May–Jun–Jul; the busiest month runs 2.8× the quietest.
- **What does it cost to enter the immune c niche?**
- Listings span $8.57–$27.51; the average listing price is $19.14 (sweet spot $15–$100). The average incumbent carries 8,818 reviews — the moat a new listing must climb.
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