---
title: "Vitamin D3 1000 Iu — $2.9M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vitamin-d3-1000-iu"
last_updated: "2026-08-09T17:59:38.513Z"
locale: en
meta:
description: "Niche score 50/100 · $2.9M/yr market · 1.1M searches/yr. A deep review moat (41,274 avg reviews) keeps it on the watch list. Data updated Aug 2026."
"og:description": "Niche score 50/100 · $2.9M/yr market · 1.1M searches/yr. A deep review moat (41,274 avg reviews) keeps it on the watch list. Data updated Aug 2026."
"og:title": "Vitamin D3 1000 Iu — $2.9M/yr Amazon US Niche (2026) - Flapen"
---
# **vitamin d3 1000 iu**
**Worth a look**
Shows searches that convert (21.6% search→purchase), but a deep review moat (41,274 avg reviews) keeps it on the watch list.
Market size 96Growth 26Conversion 100Competition 23Returns 100Price range 54Avg price 56Brand share 9Review moat 5Quality gap 14
**Conversion**
**Incredible****21.6%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Market size**
**Incredible****$2.9M**
$2.9M/yr · 1.1M searches
**Avg price**
**Good****$12.66**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$5.38–$26.47**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+1.0%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****72%**
top-5 click share — a locked-up shelf
**Quality gap**
**Bad****4.8★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Bad****96%**
top-5 brand share — brand-locked demand
**Review moat**
**Bad****41,273.56**
avg incumbent reviews — the moat a new listing must climb
According to Flapen's Amazon United States niche tracking, vitamin d3 1000 iu is a $2.9M/yr Amazon United States market (1.1M searches/yr). The top 5 brands hold 96% of demand. Verdict: Worth a look — 50/100.
Data updated Aug 5, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin d3 1000 iu market data**
- **Units sold / yr**
- **200K–250K**
- avg 10,000–12,500/product
- **Revenue / yr**
- **$2.5M–$3.2M**
- units × avg price
- **Conversion rate**
- **21.6%**
- **Avg BSR**
- **#117**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **81%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **88 months**
- **Avg seller age**
- **146 days**
## **Competition & brand share**
The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▲rising
**Sellers**
**146**
**Top-5 brand share**
**96%**
Top 20: 100%
**Top-5 click share**
**72%**
Top 20: 100%
**Open market**
**2%**
- Nature Made80% - NatureWise6% - NOW Foods5% - Nature's Bounty3% - Bronson3% - THORNE2% - Open — no brand owns it (1 brand, 2%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +1.0% search growth over the last 90 days.
25K15KPrime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/health-household/vitamin-d3-1000-iu/trend)
## **Top vitamin d3 1000 iu search terms**
- **vitamin d3 1000iu**267K/yr-5.2%19.4% conv. - **nature made vitamin d3**242K/yr-0.0%17.2% conv. - **vitamin d 1000 iu**128K/yr-0.1%15.0% conv. - **nature made d3**78K/yr-2.4%19.8% conv. - **d3 1000 iu**45K/yr+15.6%18.8% conv. - **vitamin d 1000**41K/yr-0.3%14.9% conv. - **nature made vitamin d**38K/yr-5.0%11.5% conv. - **vitamin d3 1000 iu**28K/yr+36.8%15.2% conv. - **vitamin d3 1000**28K/yr+22.0%13.5% conv. - **nature made d3 1000 iu**22K/yr+12.7%32.6% conv. [**All search terms **](https://flapen.com/research/us/health-household/vitamin-d3-1000-iu/search-terms)
## **Top vitamin d3 1000 iu 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%10%$291K20%$582K30%$873K40%$1.2M101001K10K100K1.0M Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 16 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Nature Made Vitamin D3 1000 IU (25 mcg) 180 Vitamin D Softgels**Nature Made**$8.67**4.8★60,500 rev](https://www.amazon.com/dp/B004U3Y8SI) [2**Nature Made Vitamin D3 1000 IU (25 mcg) 300 Vitamin D Softgels**Nature Made**$10.79**4.8★60,500 rev](https://www.amazon.com/dp/B004U3Y8OM) [3**Nature Made Vitamin D3 2000 IU (50 mcg) 250 Vitamin D Softgels**Nature Made**$12.90**4.8★24,865 rev](https://www.amazon.com/dp/B004GJYTF8) [4**NatureWise Vitamin D3 1000IU Supplement Immune Support 360 Mini Softgels**NatureWise**$11.66**4.7★195,696 rev](https://www.amazon.com/dp/B01J2ZA760) [5**Nature Made Vitamin D3 2000 IU (50 mcg) 220 Vitamin D Tablets**Nature Made**$12.52**4.7★26,370 rev](https://www.amazon.com/dp/B004U3Y8NI)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Bronson Vitamin D3 1000 IU (25mcg) Low Dose Vitamin D 360 Tablets**Bronson**$9.85**93 rev7mo ago](https://www.amazon.com/dp/B0G7L2TSF7) [**Nature Made Vitamin D3 K2 Supplement 30 Softgels**Nature Made**$12.53**10,717 rev4y ago](https://www.amazon.com/dp/B09SR2KX9D) [**Nature Made Vitamin D3 5000 IU (125 mcg) 360 Vitamin D Softgels**Nature Made**$26.47**67,638 rev6y ago](https://www.amazon.com/dp/B0828JGTXB) [**NatureWise Vitamin D3 1000IU Supplement Immune Support 360 Mini Softgels**NatureWise**$11.66**195,696 rev10y ago](https://www.amazon.com/dp/B01J2ZA760) [**Nature Made Vitamin D3 5000 IU (125 mcg) 180 Vitamin D Softgels**Nature Made**$13.36**67,638 rev14y ago](https://www.amazon.com/dp/B008GC9T6A)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Bronson Vitamin D3 1000 IU (25mcg) Low Dose Vitamin D 360 Tablets**Bronson**$9.85**4.7★**▲ 182%**](https://www.amazon.com/dp/B0G7L2TSF7) [**Nature Made Vitamin D3 5000 IU (125 mcg) 360 Vitamin D Softgels**Nature Made**$26.47**4.8★**▲ 38%**](https://www.amazon.com/dp/B0828JGTXB) [**Pure Encapsulations Vitamin D3 25 mcg (1 000 IU) - Supplement to Support Bone Joint Breast Heart Colon & Immune Health* - with Premium Vitamin D - 120 Capsules**Pure Encapsulations**$26.10**4.8★**▲ 35%**](https://www.amazon.com/dp/B002AMFNTY) [**NOW Supplements Vitamin D-3 1 000 IU High Potency Structural support* 180 Softgels**NOW Foods**$5.38**4.8★**▲ 32%**](https://www.amazon.com/dp/B000A0LE6O) [**Nature Made Vitamin D3 1000 IU (25 mcg) 180 Vitamin D Softgels**Nature Made**$8.67**4.8★**▲ 32%**](https://www.amazon.com/dp/B004U3Y8SI)
**~~View all trending →~~**
## **What buyers say about vitamin d3 1000 iu**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Vitamin**23%
*“Great vitamin”*
**Quality-Overall**15%
*“the quality seems consistent”*
**Value For Money**14%
*“Great deal”*
**Advertised Vs Actual Product**8%
*“accurately described”*
**Ease Of Chewing/Swallowing**7%
*“Ease swallow”*
**Ease Of Use**4%
*“easy to use”*
**Efficiency**3%
*“Works well”*
**Dosage**3%
*“Dosage is perfect for my age”*
**Nutritional Content**2%
*“Great supplement”*
**Natural Ingredients**1%
*“I trust Nature Made”*
### **What buyers complain about **
**Vitamin**13%
*“No vitamins only a few”*
**Dosage**10%
*“that these are very low dose”*
**Size-Overall**9%
*“Too big”*
**Advertised Vs Actual Product**6%
*“Very misleading”*
**Value For Money**5%
*“Not a good value”*
**Functionality-Overall**4%
*“Cant provide results yet”*
**Ingredients-Overall**3%
*“Ingredients contain soybean oil”*
**Quality-Overall**3%
*“Not high quality”*
**Smell**3%
*“Stinky gross”*
**Ease Of Chewing/Swallowing**2%
*“Difficult to swallow”*
### **Top return reasons **
**Value For Money**20%
**Vitamin**16%
**Dosage**16%
**Ingredients-Overall**8%
**Size-Overall**8%
**Functionality-Overall**8%
**Quality-Overall**4%
**Smell**4%
**Ease Of Chewing/Swallowing**4%
**Calcium**4%
## **Common questions**
- **Is vitamin d3 1000 iu profitable to sell on Amazon United States?**
- The niche generates $2.9M/yr across 16 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +1.0%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the vitamin d3 1000 iu niche?**
- 7 brands and 146 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 96% of demand.
- **What do buyers complain about in vitamin d3 1000 iu?**
- Top complaints mined from reviews: Vitamin, Dosage, Size-Overall. The return rate is 0.0%.
- **When does demand for vitamin d3 1000 iu peak?**
- Demand is steady year-round — the busiest month runs 1.7× the quietest.
- **What does it cost to enter the vitamin d3 1000 iu niche?**
- Listings span $5.38–$26.47; the average listing price is $12.66 (sweet spot $15–$100). The average incumbent carries 41,274 reviews — the moat a new listing must climb.
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