---
title: "Vitamin D 800 Iu — $45K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vitamin-d-800-iu"
last_updated: "2026-08-09T21:47:18.787Z"
locale: en
meta:
description: "Niche score 46/100 · $45K/yr market · 58K searches/yr · $10.89 avg price. Doesn't clear our bar today. Data updated Aug 2026."
"og:description": "Niche score 46/100 · $45K/yr market · 58K searches/yr · $10.89 avg price. Doesn't clear our bar today. Data updated Aug 2026."
"og:title": "Vitamin D 800 Iu — $45K/yr Amazon US Niche (2026) - Flapen"
---
# **vitamin d 800 iu**
**Skip it**
A deep review moat (34,072 avg reviews) — this niche doesn't clear our bar today.
Market size 11Growth 34Conversion 76Competition 59Returns 100Price range 52Avg price 41Brand share 55Review moat 9Quality gap 19
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****7.2%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Good****50%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****72%**
top-5 brand share — brands hold most of the demand
**Price range**
**Good****$4.86–$26.10**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Okay****$10.89**
avg listing price — sweet spot $15–$100
**Growth**
**Okay****+6.8%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$45K**
$45K/yr · 58K searches
**Review moat**
**Bad****34,072.29**
avg incumbent reviews — the moat a new listing must climb
According to Flapen's Amazon United States niche tracking, vitamin d 800 iu is a $45K/yr Amazon United States market (58K searches/yr). The top 5 brands hold 72% of demand. Verdict: Skip it — 46/100.
Data updated Aug 5, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin d 800 iu market data**
- **Units sold / yr**
- **5K–6K**
- avg 100–250/product
- **Revenue / yr**
- **$54K–$65K**
- units × avg price
- **Conversion rate**
- **7.2%**
- **Avg BSR**
- **#294**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **62%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **94 months**
- **Avg seller age**
- **157 days**
## **Competition & brand share**
The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▼falling
**Sellers**
**410**
**Top-5 brand share**
**72%**
Top 20: 100%
**Top-5 click share**
**50%**
Top 20: 99%
**Open market**
**21%**
- Nature Made30% - DEVA13% - NatureWise12% - NOW Foods10% - Pure Encapsulations7% - Nature's Truth7%
## **Demand & seasonality**
Weekly Amazon search volume, last 100 weeks — +6.8% search growth over the last 90 days.
1K750Spike '25 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/health-household/vitamin-d-800-iu/trend)
## **Top vitamin d 800 iu search terms**
- **vitamin d 800 iu**22K/yr+2.6%8.2% conv. - **vitamin d3 800 iu**16K/yr+14.1%7.2% conv. - **vitamin d 800 iu for women**7K/yr-2.9%7.0% conv. - **vitamin d 800 mg**5K/yr+33.0%3.8% conv. - **vitamin d3 800 iu for women**5K/yr-11.4%7.6% conv. - **800 iu vitamin d**4K/yr+15.5%7.1% conv. [**All search terms **](https://flapen.com/research/us/health-household/vitamin-d-800-iu/search-terms)
## **Top vitamin d 800 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%5%$2K10%$5K15%$7K20%$9K101001K10K100K1.0M Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 21 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) 300 Vitamin D Softgels**Nature Made**$10.79**4.8★60,500 rev](https://www.amazon.com/dp/B004U3Y8OM) [2**NatureWise Vitamin D3 1000IU Supplement Immune Support 360 Mini Softgels**NatureWise**$11.66**4.7★195,696 rev](https://www.amazon.com/dp/B01J2ZA760) [3**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) [4**NOW Supplements Vitamin D-3 400 IU Strong Bones* Structural support* 180 Softgels**NOW Foods**$4.86**4.7★5,350 rev](https://www.amazon.com/dp/B000V7EIH8) [5**Natures Truth Vitamin D3 400 IU 100 Count**Nature's Truth**$6.85**4.7★1,046 rev](https://www.amazon.com/dp/B06X9DZ325)
**~~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) [**NatureWise Vitamin D3 1000iu (25 mcg) 90-Day Supply for Immune Support Healthy Muscle Function and Bone Health Gluten Free in Organic Extra Virgin Olive Oil (Mini Softgel) 90 Count**NatureWise**$8.53**195,696 rev2y ago](https://www.amazon.com/dp/B0CKFZF11Y) [**Carlyle Vitamin D3 400iu (10mcg) | 400 Tablets | Value Size**Carlyle**$9.19**374 rev4y ago](https://www.amazon.com/dp/B09F3TS42V) [**Garden of Life Kids Organic Vitamin D3 Gummies with 800 IU (100% Daily Value) for Strong Bones Teeth Brain & Immunity Non-GMO No Gluten Vegetarian Sugar Free Orange Flavor 60 Servings**Garden of Life**$11.92**2,401 rev6y ago](https://www.amazon.com/dp/B07TP6DL82) [**Natures Truth Vitamin D3 400 IU 100 Count**Nature's Truth**$6.85**1,046 rev9y ago](https://www.amazon.com/dp/B06X9DZ325)
**~~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★**▲ 145%**](https://www.amazon.com/dp/B0G7L2TSF7) [**Natures Truth Vitamin D3 400 IU 100 Count**Nature's Truth**$6.85**4.7★**▲ 106%**](https://www.amazon.com/dp/B06X9DZ325) [**Deva Vegan Vitamins Vitamin D 800Iu Vegan 90 Tab**DEVA**$8.51**4.3★**▲ 105%**](https://www.amazon.com/dp/B00DIXF0PQ) [**Natural Nutra Vitamin D3 400 IU Softgels Gluten-Free Vitamin D 100 Count**Natural Nutra**$15.05**4.6★**▲ 75%**](https://www.amazon.com/dp/B00TIY7674) [**NOW Foods Supplements Vitamin D-3 1 000 IU High Potency Structural Support* 360 Softgels**NOW Foods**$9.85**4.8★**▲ 41%**](https://www.amazon.com/dp/B0025P0ZEY)
**~~View all trending →~~**
## **What buyers say about vitamin d 800 iu**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Vitamin**21%
*“Great vitamin”*
**Value For Money**16%
*“fair price”*
**Quality-Overall**15%
*“the quality seems consistent”*
**Advertised Vs Actual Product**9%
*“accurately described”*
**Ease Of Chewing/Swallowing**5%
*“The tablets are easy to swallow or chew”*
**Calcium**4%
*“Overall, it feels like a reliable and straightforward calcium supplement”*
**Dosage**4%
*“Dosage is perfect for my age”*
**Efficiency**3%
*“Works well”*
**Ease Of Use**3%
*“which is convenient”*
**Nutritional Content**1%
*“It is very useful nutrition”*
### **What buyers complain about **
**Size-Overall**12%
*“SO TINY”*
**Dosage**8%
*“the dose is too little for what most humans need for a daily dose”*
**Vitamin**7%
*“Just a vitamin, nothing note worthy”*
**Ingredients-Overall**4%
*“Ingredients contain soybean oil”*
**Smell**4%
*“Smelled so bad”*
**Quality-Overall**3%
*“Not high quality”*
**Functionality-Overall**3%
*“Cant provide results yet”*
**Ease Of Use**2%
*“The softgels themselves are also not as easy to take as I expected”*
**Ease Of Chewing/Swallowing**2%
*“Super sticky/chewy”*
**Calcium**2%
*“Calcium, Could NOT use, do NOT resend”*
### **Top return reasons **
**Dosage**21%
**Ingredients-Overall**11%
**Vitamin**11%
**Value For Money**11%
**Ease Of Chewing/Swallowing**11%
**Smell**8%
**Calcium**5%
**Vegan/Organic**5%
**Joint Pain**5%
**Functionality-Overall**5%
## **Common questions**
- **Is vitamin d 800 iu profitable to sell on Amazon United States?**
- The niche generates $45K/yr across 21 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +6.8%. Flapen's verdict: Skip it (46/100).
- **How competitive is the vitamin d 800 iu niche?**
- 12 brands and 410 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 72% of demand.
- **What do buyers complain about in vitamin d 800 iu?**
- Top complaints mined from reviews: Size-Overall, Dosage, Vitamin. The return rate is 0.0%.
- **When does demand for vitamin d 800 iu peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the vitamin d 800 iu niche?**
- Listings span $4.86–$26.10; the average listing price is $10.89 (sweet spot $15–$100). The average incumbent carries 34,072 reviews — the moat a new listing must climb.
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