---
title: "Ester C 1000mg Capsules — $878K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/ester-c-1000mg-capsules"
last_updated: "2026-08-10T07:18:15.619Z"
locale: en
meta:
description: "Niche score 47/100 · $878K/yr market · 231K searches/yr · $18.17 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $878K/yr market · 231K searches/yr · $18.17 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Ester C 1000mg Capsules — $878K/yr Amazon US Niche (2026) - Flapen"
---
# **ester c 1000mg capsules**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 75Growth 20Conversion 100Competition 16Returns 100Price range 61Avg price 83Brand share 0Review moat 21Quality gap 16
**Conversion**
**Incredible****21.0%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$18.17**
avg listing price — sweet spot $15–$100
**Market size**
**Great****$878K**
$878K/yr · 231K searches
**Price range**
**Good****$6.63–$28.06**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Bad****11,037.4**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-9.6%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****80%**
top-5 click share — a locked-up shelf
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, ester c 1000mg capsules is a $878K/yr Amazon United States market (231K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Mar–Dec. Verdict: Skip it — 47/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **ester c 1000mg capsules market data**
- **Units sold / yr**
- **50K–60K**
- avg 5,000–6,000/product
- **Revenue / yr**
- **$909K–$1.1M**
- units × avg price
- **Conversion rate**
- **21.0%**
- **Avg BSR**
- **#216**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **80%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **112 months**
- **Avg seller age**
- **154 days**
## **Competition & brand share**
The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **▼falling
**Sellers**
**37**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**80%**
Top 20: 100%
**Open market**
**0%**
- Ester-C62% - American Health34% - Solgar4%
## **Demand & seasonality**
Weekly Amazon search volume, last 70 weeks — -9.6% search growth over the last 90 days.
5K3KSpike '25Prime Day '25Holiday '25Spike '26 seasonAprMayJunJulAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: Jan, Feb, Mar, Dec · busiest ÷ quietest = 12.8×
[**Open Trend **](https://flapen.com/research/us/health-household/ester-c-1000mg-capsules/trend)
## **Top ester c 1000mg capsules search terms**
- **ester c**96K/yr-7.3%18.1% conv. - **ester c 1000mg**54K/yr-0.8%21.6% conv. - **esterc vitamin c 1000 mg capsules**13K/yr-7.0%25.8% conv. - **ester c 1000mg capsules**21K/yr-14.9%20.9% conv. - **ester-c**13K/yr+7.3%8.3% conv. - **esther c 1000**5K/yr+12.1%21.3% conv. - **vitamin c ester**5K/yr-9.3%10.9% conv. - **esther c**5K/yr-23.2%22.1% conv. - **ester-c 1000mg**4K/yr+2.8%25.8% conv. - **stomach friendly vitamin c**2K/yr-4.9%2.8% conv. [**All search terms **](https://flapen.com/research/us/health-household/ester-c-1000mg-capsules/search-terms)
## **Top ester c 1000mg capsules 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%15%$132K30%$264K45%$395K60%$527K1K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Ester-C Vitamin C 1000 mg Coated Tablets Immune System Booster Stomach-Friendly Supplement 120 Count**Ester-C**$14.66**4.7★20,436 rev](https://www.amazon.com/dp/B0013FYHSW) [2**Ester-C American Health with Citrus Bioflavonoids Capsules - 24-Hour Immune Support Gentle On Stomach Non-Acidic Vitamin C - Non-GMO Gluten-Free - 1000 mg 90 Count**American Health**$20.53**4.8★5,675 rev](https://www.amazon.com/dp/B072KCDJJP) [3**Ester-C 500 mg 24 Hour Vitamin C Tablets for Immune Support Vitamin C Supplement 90 Count**Ester-C**$6.63**4.8★8,786 rev](https://www.amazon.com/dp/B004X8MJM2) [4**American Health Ester-C with Citrus Bioflavonoids Capsules - Gentle On Stomach Non-Acidic Vitamin C - 500 mg 60 Servings 120 Count**American Health**$13.13**4.8★9,974 rev](https://www.amazon.com/dp/B000OP6VY0) [5**Ester-C Vitamin C 1 000 mg 90 Coated Tablets**Ester-C**$13.68**4.7★20,436 rev](https://www.amazon.com/dp/B002ZG8DJC)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**American Health Ester-C 1000 mg with Bioflavonoids Capsules 24Hour Immune Support Gentle on Stomach NonAcidic Vitamin C NonGMO Gluten-Free Servings Citrus 105 Count**American Health**$23.90**5,675 rev5y ago](https://www.amazon.com/dp/B08PW3NM3W) [**Ester-C 500 mg 24 Hour Vitamin C Tablets for Immune Support Vitamin C Supplement 90 Count**Ester-C**$6.63**8,786 rev13y ago](https://www.amazon.com/dp/B004X8MJM2) [**Ester-C Vitamin C 1 000 mg 90 Coated Tablets**Ester-C**$13.68**20,436 rev16y ago](https://www.amazon.com/dp/B002ZG8DJC) [**Ester-C American Health with Citrus Bioflavonoids Capsules - 24-Hour Immune Support Gentle On Stomach Non-Acidic Vitamin C - Non-GMO Gluten-Free - 1000 mg 90 Count**American Health**$20.53**5,675 rev17y ago](https://www.amazon.com/dp/B072KCDJJP) [**Ester-C Vitamin C 1000 mg Coated Tablets Immune System Booster Stomach-Friendly Supplement 120 Count**Ester-C**$14.66**20,436 rev18y ago](https://www.amazon.com/dp/B0013FYHSW)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Ester-C 500 mg 24 Hour Vitamin C Tablets for Immune Support Vitamin C Supplement 90 Count**Ester-C**$6.63**4.8★**▲ 27%**](https://www.amazon.com/dp/B004X8MJM2) [**Ester-C Vitamin C 1 000 mg 90 Coated Tablets**Ester-C**$13.68**4.7★**▲ 15%**](https://www.amazon.com/dp/B002ZG8DJC) [**Solgar Ester-C Plus 1000 mg Vitamin C (Ascorbate Complex) - 180 Tablets - Gentle & Non Acidic - Supports Upper Respiratory Health - Non-GMO Gluten-Free - 180 Servings**Solgar**$26.19**4.7★**▲ 10%**](https://www.amazon.com/dp/B00020IBC2) [**American Health Ester-C with Citrus Bioflavonoids Capsules - Gentle On Stomach Non-Acidic Vitamin C - 500 mg 60 Servings 120 Count**American Health**$13.13**4.8★**— 6%**](https://www.amazon.com/dp/B000OP6VY0) [**American Health Ester-C 1000 mg with Bioflavonoids Capsules 24Hour Immune Support Gentle on Stomach NonAcidic Vitamin C NonGMO Gluten-Free Servings Citrus 105 Count**American Health**$23.90**4.8★**— 5%**](https://www.amazon.com/dp/B08PW3NM3W)
**~~View all trending →~~**
## **What buyers say about ester c 1000mg capsules**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Vitamin**24%
*“Best vitamins”*
**Quality-Overall**11%
*“Excellent product”*
**Acid Regulator/Stomach Ache Relief**11%
*“Great and no stomach cramps”*
**Value For Money**7%
*“Affordable”*
**Ease Of Chewing/Swallowing**7%
*“EASY TO SWALLOW”*
**Advertised Vs Actual Product**6%
*“Does exactly as advertised”*
**Immunity Booster**5%
*“Good immune support”*
**Cold Relief**4%
*“it can keep you away from colds and flu”*
**Regulates Digestion**3%
*“Stomach friendly”*
**Durability**2%
*“Been using it for years”*
### **What buyers complain about **
**Size-Overall**33%
*“They are huge”*
**Ease Of Chewing/Swallowing**21%
*“Too big for me to swallow”*
**Vitamin**7%
*“Do not buy vitamins”*
**Ingredients-Overall**5%
*“This product did not show other ingredients on the label that was shown on the item page”*
**Heart Health**5%
*“If something that is supposed to maintain health makes you feel worse”*
**Vegan/Organic**4%
*“Not Kosher/Halal”*
**Hard Feel**3%
*“They are also hard like a rock”*
**Dosage**3%
*“Its difficult to find 1000 mg tablet”*
**Acid Regulator/Stomach Ache Relief**2%
*“However, once it reached my intestines, this stuff triggered some real indigestion”*
**Side Effects**1%
*“Not without side effects”*
### **Top return reasons **
**Value For Money**60%
**Advertised Vs Actual Product**20%
**Ingredients-Overall**10%
**Side Effects**10%
## **Common questions**
- **Is ester c 1000mg capsules profitable to sell on Amazon United States?**
- The niche generates $878K/yr across 10 tracked products. 90-day search growth is -9.6%. Flapen's verdict: Skip it (47/100).
- **How competitive is the ester c 1000mg capsules niche?**
- 3 brands and 37 sellers compete. The top 5 products take 80% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in ester c 1000mg capsules?**
- Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Vitamin. The return rate is 0.0%.
- **When does demand for ester c 1000mg capsules peak?**
- Demand peaks in Jan–Feb–Mar–Dec; the busiest month runs 12.8× the quietest.
- **What does it cost to enter the ester c 1000mg capsules niche?**
- Listings span $6.63–$28.06; the average listing price is $18.17 (sweet spot $15–$100). The average incumbent carries 11,037 reviews — the moat a new listing must climb.
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