---
title: "Vitamin D and Magnesium — $335K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vitamin-d-and-magnesium"
last_updated: "2026-08-09T21:44:00.794Z"
locale: en
meta:
description: "Niche score 47/100 · $335K/yr market · 286K searches/yr · $17.76 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $335K/yr market · 286K searches/yr · $17.76 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Vitamin D and Magnesium — $335K/yr Amazon US Niche (2026) - Flapen"
---
# **vitamin d and magnesium**
**Skip it**
A concentrated shelf (top 5 take 74% of clicks) — this niche doesn't clear our bar today.
Market size 53Growth 31Conversion 72Competition 22Returns 99Price range 81Avg price 82Brand share 30Review moat 24Quality gap 22
**Returns**
**Incredible****0.3%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$17.76**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$8.97–$42.94**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****6.6%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****$335K**
$335K/yr · 286K searches
**Growth**
**Okay****+5.0%**
90-day search growth — must beat 0% to launch
**Brand share**
**Okay****87%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Bad****5,101.93**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****74%**
top-5 click share — a locked-up shelf
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, vitamin d and magnesium is a $335K/yr Amazon United States market (286K searches/yr). The top 5 brands hold 87% of demand. Verdict: Skip it — 47/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin d and magnesium market data**
- **Units sold / yr**
- **25K–30K**
- avg 2,500–3,000/product
- **Revenue / yr**
- **$444K–$533K**
- units × avg price
- **Conversion rate**
- **6.6%**
- **Avg BSR**
- **#223**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **93%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **55 months**
- **Avg seller age**
- **151 days**
## **Competition & brand share**
The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**11 **▲rising
**Sellers**
**84**
**Top-5 brand share**
**87%**
Top 20: 100%
**Top-5 click share**
**74%**
Top 20: 100%
**Open market**
**10%**
- Live Conscious37% - Nature Made37% - Nature's Bounty5% - Bronson4% - Totaria4% - Carlyle3% - Open — no brand owns it (5 brands, 10%)
## **Demand**
Weekly Amazon search volume, last 29 weeks — +5.0% search growth over the last 90 days.
6K4KSpike '26Prime Day '26Jan '26Feb '26Mar '26Apr '26May '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/us/health-household/vitamin-d-and-magnesium/trend)
## **Top vitamin d and magnesium search terms**
- **magwell**48K/yr-6.6%11.9% conv. - **nature made magnesium complex**34K/yr+16.6%7.0% conv. - **vitamin d and magnesium**22K/yr-8.0%2.8% conv. - **magnesium vitamin d**21K/yr-9.1%2.8% conv. - **magnesium and vitamin d**20K/yr-4.8%2.8% conv. - **vitamin d magnesium**17K/yr-0.8%2.1% conv. - **magwell magnesium with zinc & d3**21K/yr-16.5%17.4% conv. - **magnesium complex nature made**12K/yr+48.0%6.6% conv. - **vitamin d with magnesium**14K/yr+3.6%2.1% conv. - **magnesium with vitamin d**11K/yr+13.0%2.0% conv. [**All search terms **](https://flapen.com/research/us/health-household/vitamin-d-and-magnesium/search-terms)
## **Top vitamin d and magnesium 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%$33K20%$67K30%$100K40%$134K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 15 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Live Conscious Magwell Magnesium Zinc & Vitamin D3 - Magnesium Glycinate Malate & Citrate - Triple Supplement for Women & Men - for Sleep Bone Heart Immune Support - 120 Caps**Live Conscious**$23.13**4.6★17,083 rev](https://www.amazon.com/dp/B07R75TKXP) [2**Nature Made Magnesium Complex Supplement with Vitamin D & Zinc 60 Capsules**Nature Made**$14.89**4.7★3,879 rev](https://www.amazon.com/dp/B0BX7HSL2S) [3**Nature Made High Absorption Magnesium Complex Soft Chews 40 Count**Nature Made**$15.11**4.6★568 rev](https://www.amazon.com/dp/B0DVBMQ8N3) [4**Natures Bounty Advanced Vitamin D3 with Magnesium Citrate Immune Formula Supports Immune and Bone Health 90 Tablets**Nature's Bounty**$8.97**4.7★1,096 rev](https://www.amazon.com/dp/B0BWYZWL4H) [5**Nature Made Calcium Magnesium Zinc with Vitamin D3 Dietary Calcium Supplement for Bone Support 300 Tablets**Nature Made**$11.13**4.8★20,083 rev](https://www.amazon.com/dp/B000OD1F7U)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Bronson Vitamin K2+D3 Magnesium Glycinate Supplement 60 Capsules**Bronson**$9.36**155 rev5mo ago](https://www.amazon.com/dp/B0GNN7HRKC) [![NatureWise Magnesium Glycinate 550mg + High-Dose 10000 IU Vitamin D3 K2 100 mcg - D3 K2 Magnesium Supplement - Chelated for High Absorption - Bone Support - Non-GMO USA Manufactured - [30-Day Supply]](https://m.media-amazon.com/images/I/41R7LVaeHyL.jpg)**NatureWise Magnesium Glycinate 550mg + High-Dose 10000 IU Vitamin D3 K2 100 mcg - D3 K2 Magnesium Supplement - Chelated for High Absorption - Bone Support - Non-GMO USA Manufactured - \[30-Day Supply\]**NatureWise**$14.35**128 rev9mo ago](https://www.amazon.com/dp/B0FTZZP7KG) [**9-in-1 Magnesium Glycinate 500mg + Vitamin D3 5000 IU & K2 Complex - High Absorption - Healthy Stress Sleep Muscle Function Bone Health & Energy Supports | Non-GMO Gluten-Free 120 Softgels**Totaria**$19.77**441 rev11mo ago](https://www.amazon.com/dp/B0FLHSW11D) [**Magnesium Zinc & Vitamin D3 260mg Complex High Absorption 60 Capsules**Nobi Nutrition**$15.78**78 rev1y ago](https://www.amazon.com/dp/B0FDH2VHFC) [**VEV Corefeel Vitamin D3 K2 10 000 IU Magnesium Supplement 300 Softgels**VEV**$21.34**2,552 rev1y ago](https://www.amazon.com/dp/B0F9F5JWXW)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Bronson Vitamin K2+D3 Magnesium Glycinate Supplement 60 Capsules**Bronson**$9.36**4.6★**▲ 356%**](https://www.amazon.com/dp/B0GNN7HRKC) [**HiWe for MagSafe Wallet 7 Cards Holder RFID Blocking Stronger Magnets**HiWe**$15.19**4.4★**▲ 310%**](https://www.amazon.com/dp/B0CJTKJ41H) [**Nature Made Magnesium Glycinate 300 mg per 3 Capsules 90 Capsules**Nature Made**$21.13**4.7★**▲ 87%**](https://www.amazon.com/dp/B0D9MV3YJQ) [![NatureWise Magnesium Glycinate 550mg + High-Dose 10000 IU Vitamin D3 K2 100 mcg - D3 K2 Magnesium Supplement - Chelated for High Absorption - Bone Support - Non-GMO USA Manufactured - [30-Day Supply]](https://m.media-amazon.com/images/I/41R7LVaeHyL.jpg)**NatureWise Magnesium Glycinate 550mg + High-Dose 10000 IU Vitamin D3 K2 100 mcg - D3 K2 Magnesium Supplement - Chelated for High Absorption - Bone Support - Non-GMO USA Manufactured - \[30-Day Supply\]**NatureWise**$14.35**4.6★**▲ 81%**](https://www.amazon.com/dp/B0FTZZP7KG) [**VEV Corefeel Vitamin D3 K2 10 000 IU Magnesium Supplement 300 Softgels**VEV**$21.34**4.7★**▲ 61%**](https://www.amazon.com/dp/B0F9F5JWXW)
**~~View all trending →~~**
## **What buyers say about vitamin d and magnesium**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**16%
*“EXCELLENT PRODUCT”*
**Vitamin**11%
*“Quality Vitamin”*
**Sleep Quality**10%
*“Better sleep”*
**Magnesium**9%
*“Best magnesium we've found”*
**Ease Of Chewing/Swallowing**7%
*“Easy to swallow”*
**Value For Money**6%
*“Good value for the money”*
**Advertised Vs Actual Product**3%
*“Working as stated”*
**Ease Of Use**3%
*“Very convenient for everyday use”*
**Muscle Pain Relief**2%
*“it helps me with muscle pain”*
**Energy Level**2%
*“Help your energy”*
### **What buyers complain about **
**Dosage**12%
*“Dosage check not good”*
**Size-Overall**7%
*“Large Capsules”*
**Durability**6%
*“This only lasted a couple months”*
**Magnesium**5%
*“Ineffective Magnesium Supplement”*
**Vitamin**4%
*“Wish it had Vitamin A also”*
**Value For Money**4%
*“Waste of money”*
**Sleep Quality**3%
*“it doesnt make me sleepy like I thought”*
**Taste-Overall**3%
*“tastes gross”*
**Quality-Overall**3%
*“Looks cheap”*
**Functionality-Overall**2%
*“To me that's just not functional”*
### **Top return reasons **
**Size-Overall**30%
**Magnetic Strength/Adsorption**22%
**Advertised Vs Actual Product**8%
**Functionality-Overall**6%
**Compatibility-Overall**4%
**Ease Of Use**4%
**Adhesion/Stickiness**4%
**Color**3%
**Weight Heavy**3%
**Quality-Overall**3%
## **Common questions**
- **Is vitamin d and magnesium profitable to sell on Amazon United States?**
- The niche generates $335K/yr across 15 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is +5.0%. Flapen's verdict: Skip it (47/100).
- **How competitive is the vitamin d and magnesium niche?**
- 11 brands and 84 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 87% of demand.
- **What do buyers complain about in vitamin d and magnesium?**
- Top complaints mined from reviews: Dosage, Size-Overall, Durability. The return rate is 0.3%.
- **What does it cost to enter the vitamin d and magnesium niche?**
- Listings span $8.97–$42.94; the average listing price is $17.76 (sweet spot $15–$100). The average incumbent carries 5,102 reviews — the moat a new listing must climb.
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