---
title: "Vital Core D3 K2 — $238K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vital-core-d3-k2"
last_updated: "2026-08-06T14:20:58.281Z"
locale: en
meta:
description: "Niche score 53/100 · $238K/yr market · 222K searches/yr · $26.40 avg price. Soft demand (-0.7% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 53/100 · $238K/yr market · 222K searches/yr · $26.40 avg price. Soft demand (-0.7% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Vital Core D3 K2 — $238K/yr Amazon US Niche (2026) - Flapen"
---
# **vital core d3 k2**
**Worth a look**
Shows low returns (0.0%), but soft demand (-0.7% this quarter) keeps it on the watch list.
Market size 45Growth 25Conversion 51Competition 31Returns 100Price range 85Avg price 95Brand share 36Review moat 44Quality gap 76
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$26.40**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$12.11–$36.31**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****4.1%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Okay****$238K**
$238K/yr · 222K searches
**Review moat**
**Okay****2,128.76**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****83%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****66%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Bad****-0.7%**
90-day search growth — must beat 0% to launch
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, vital core d3 k2 is a $238K/yr Amazon United States market (222K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Jan–Dec. Verdict: Worth a look — 53/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vital core d3 k2 market data**
- **Units sold / yr**
- **6K–8K**
- avg 250–500/product
- **Revenue / yr**
- **$158K–$211K**
- units × avg price
- **Conversion rate**
- **4.1%**
- **Avg BSR**
- **#981**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **94%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **28 months**
- **Avg seller age**
- **153 days**
## **Competition & brand share**
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**11 **▲rising
**Sellers**
**17**
**Top-5 brand share**
**83%**
Top 20: 100%
**Top-5 click share**
**66%**
Top 20: 100%
**Open market**
**12%**
- true nutra29% - Clean Nutraceuticals21% - VivoNu20% - NEW AGE8% - VEV6% - NUSAVA5% - Open — no brand owns it (5 brands, 12%)
## **Demand & seasonality**
Weekly Amazon search volume, last 73 weeks — -0.7% search growth over the last 90 days.
15K10KSpike '25Prime Day '25Holiday '25Spike '26Prime Day '26 seasonMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Jan, Dec · busiest ÷ quietest = 47.7×
[**Open Trend **](https://flapen.com/research/us/health-household/vital-core-d3-k2/trend)
## **Top vital core d3 k2 search terms**
- **true nutra**178K/yr-2.6%3.1% conv. - **tru nutra**32K/yr+13.3%3.7% conv. - **trunutra**3K/yr+5.7%1.8% conv. - **truenutra**2K/yr+20.4%3.9% conv. - **true nutra drops**7K/yr-65.1%5.3% conv. [**All search terms **](https://flapen.com/research/us/health-household/vital-core-d3-k2/search-terms)
## **Top vital core d3 k2 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%$24K20%$48K30%$71K40%$95K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 17 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**14-in-1 Berberine with Ceylon Cinnamon Supplement Liquid Drops 1800mg + 30:1 Liposomal Tech with Cayenne Pepper Soursop Chromium Bitter Melon Turmeric Moringa Gymnema Glucomannan GLP Support**VivoNu**$12.11**4.3★858 rev](https://www.amazon.com/dp/B0G4LX1S57) [2**true nutra D3 K2Vitamin D3 K2 10 000 IU Magnesium Supplement Non-GMO Gluten-Free Supports Immune & Energy 300 Coconut Oil Softgels**true nutra**$28.31**4.3★99 rev](https://www.amazon.com/dp/B0GGH2Z49L) [3**Clean Nutra Berberine with Ceylon Cinnamon Supplement Liquid Drops + Bitter Melon Extract Glucomannan Gymnema Chromium Turmeric Organic Panax Ginseng Moringa**Clean Nutraceuticals**$28.52**4.4★5,298 rev](https://www.amazon.com/dp/B0D75VX5ML) [4**true nutra Lymphatic ComplexLymphatic ComplexNatural Ingredients60 Soft Capsules**true nutra**$27.89**3.8★28 rev](https://www.amazon.com/dp/B0GTM24KDV) [5**Clean Nutra Cayenne Pepper Drops Supplement Liquid + Hawthorn Berry Vitamin D3 K2 Beet Root Powder Ceylon Cinnamon Turmeric Curcumin Organic Panax Ginseng Berberine Extract 1 Pack**Clean Nutraceuticals**$27.79**4.4★7,233 rev](https://www.amazon.com/dp/B0D7537K4Z)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**true nutra D3 K2 Vitamin D3 K2 Magnesium 10 000 IU Supplement Supports Immune & Energy Bone & Muscle Support 300 Coconut Oil Softgels 1 Pack**true nutra**$27.52**23 rev3mo ago](https://www.amazon.com/dp/B0GSF7L19R) [**True Nutra D3 K2 True Nutra Vitamin D3 K2 10 000 IU Magnesium Supplement 2 in 1 Vitamins Supplement D & K Non-GMO 300 Softgels (1pcs)**True Nutra Pure**$24.92**4 rev3mo ago](https://www.amazon.com/dp/B0GVN2L6ZK) [**True nutra Magnesium ComplexAdvanced 8-in-1 Magnesium BlendGlycinate Citrate Malate Taurate etcHigh Formula90 Capsules**true nutra**$28.70**10 rev4mo ago](https://www.amazon.com/dp/B0GV3QBVR4) [**true nutra Lymphatic ComplexLymphatic ComplexNatural Ingredients60 Soft Capsules**true nutra**$27.89**28 rev4mo ago](https://www.amazon.com/dp/B0GTM24KDV) [**true nutra D3 K2Vitamin D3 K2 10 000 IU Magnesium Supplement Non-GMO Gluten-Free Supports Immune & Energy 300 Coconut Oil Softgels**true nutra**$28.31**99 rev6mo ago](https://www.amazon.com/dp/B0GGH2Z49L)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**True Nutra D3 K2 True Nutra Vitamin D3 K2 10 000 IU Magnesium Supplement 2 in 1 Vitamins Supplement D & K Non-GMO 300 Softgels (1pcs)**True Nutra Pure**$24.92**3.2★**▲ 160%**](https://www.amazon.com/dp/B0GVN2L6ZK) [**true nutra D3 K2 Vitamin D3 K2 Magnesium 10 000 IU Supplement Supports Immune & Energy Bone & Muscle Support 300 Coconut Oil Softgels 1 Pack**true nutra**$27.52**4.7★**▲ 126%**](https://www.amazon.com/dp/B0GSF7L19R) [**True nutra Magnesium ComplexAdvanced 8-in-1 Magnesium BlendGlycinate Citrate Malate Taurate etcHigh Formula90 Capsules**true nutra**$28.70**4.6★**▲ 120%**](https://www.amazon.com/dp/B0GV3QBVR4) [**true nutra Lymphatic ComplexLymphatic ComplexNatural Ingredients60 Soft Capsules**true nutra**$27.89**3.8★**▲ 116%**](https://www.amazon.com/dp/B0GTM24KDV) [**Magnesium Complex Supplement 8 Elemental 1000mg - Magnesium Glycinate Citrate Malate Taurate Chelated for Easy Absorption for Bones Muscle Recovery Energy Vegan Non-GMO 90 Capsules**Toplux**$28.49**4.6★**▲ 92%**](https://www.amazon.com/dp/B0CRY2SVPV)
**~~View all trending →~~**
## **What buyers say about vital core d3 k2**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**17%
*“Always consistent in quality”*
**Taste-Overall**12%
*“There is no unpleasant taste”*
**Vitamin**8%
*“Excellent vitamin supplement”*
**Energy Level**6%
*“Energy Boost”*
**Blood Sugar Level**4%
*“This has helped my sugar”*
**Sleep Quality**4%
*“Good sleep”*
**Value For Money**4%
*“Good price”*
**Advertised Vs Actual Product**4%
*“As described”*
**Magnesium**3%
*“Magnesium pills great to take”*
**Efficiency**3%
*“This product is indeed effective”*
### **What buyers complain about **
**Taste-Overall**21%
*“taste is a bit strong”*
**Functionality-Overall**7%
*“DOESNT WORK”*
**Dosage**7%
*“Dosage check not good”*
**Smell**6%
*“Strong odor”*
**Blood Sugar Level**4%
*“This product doesnt work on blood sugar”*
**Side Effects**4%
*“Bad side effects”*
**Value For Money**3%
*“Too expensive”*
**Advertised Vs Actual Product**3%
*“Product is deceptive”*
**Vitamin**3%
*“The worst B-vitamins I have ever taken”*
**Acid Regulator/Stomach Ache Relief**2%
*“Extreme bloating”*
### **Top return reasons **
**Functionality-Overall**17%
**Advertised Vs Actual Product**12%
**Taste-Overall**8%
**Magnesium**7%
**Regulates Digestion**5%
**Smell**5%
**Solubility**3%
**Thickness**3%
**Side Effects**3%
**Hard Feel**3%
## **Common questions**
- **Is vital core d3 k2 profitable to sell on Amazon United States?**
- The niche generates $238K/yr across 17 tracked products. 5 of 6 products launched in the last 360 days are still selling. 90-day search growth is -0.7%. Flapen's verdict: Worth a look (53/100).
- **How competitive is the vital core d3 k2 niche?**
- 11 brands and 17 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 83% of demand.
- **What do buyers complain about in vital core d3 k2?**
- Top complaints mined from reviews: Taste-Overall, Functionality-Overall, Dosage. The return rate is 0.0%.
- **When does demand for vital core d3 k2 peak?**
- Demand peaks in Jan–Dec; the busiest month runs 47.7× the quietest.
- **What does it cost to enter the vital core d3 k2 niche?**
- Listings span $12.11–$36.31; the average listing price is $26.40 (sweet spot $15–$100). The average incumbent carries 2,129 reviews — the moat a new listing must climb.
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