---
title: "Vitamin D and Magnesium Supplement — $54K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vitamin-d-and-magnesium-supplement"
last_updated: "2026-08-10T10:19:24.175Z"
locale: en
meta:
description: "Niche score 47/100 · $54K/yr market · 83K searches/yr · $17.98 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $54K/yr market · 83K searches/yr · $17.98 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Vitamin D and Magnesium Supplement — $54K/yr Amazon US Niche (2026) - Flapen"
---
# **vitamin d and magnesium supplement**
**Skip it**
A small market ($54K/yr) — this niche doesn't clear our bar today.
Market size 13Growth 21Conversion 45Competition 57Returns 100Price range 69Avg price 82Brand share 75Review moat 25Quality gap 22
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$17.98**
avg listing price — sweet spot $15–$100
**Brand share**
**Great****60%**
top-5 brand share — no brand owns this niche
**Price range**
**Good****$5.33–$36.63**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****51%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Okay****3.6%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Bad****4,180.6**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-7.1%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$54K**
$54K/yr · 83K searches
According to Flapen's Amazon United States niche tracking, vitamin d and magnesium supplement is a $54K/yr Amazon United States market (83K searches/yr). The top 5 brands hold 60% of demand. Demand peaks in Aug–Sep–Oct–Nov–Dec. 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 supplement market data**
- **Units sold / yr**
- **4K–5K**
- avg 100–250/product
- **Revenue / yr**
- **$72K–$90K**
- units × avg price
- **Conversion rate**
- **3.6%**
- **Avg BSR**
- **#272**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **96%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **59 months**
- **Avg seller age**
- **153 days**
## **Competition & brand share**
The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**22 **▲rising
**Sellers**
**111**
**Top-5 brand share**
**60%**
Top 20: 98%
**Top-5 click share**
**51%**
Top 20: 95%
**Open market**
**34%**
- Nature Made25% - Nature's Bounty13% - Bronson8% - Totaria7% - Carlyle7% - Live Conscious6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -7.1% search growth over the last 90 days.
6K4KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Aug, Sep, Oct, Nov, Dec · busiest ÷ quietest = 2.8×
[**Open Trend **](https://flapen.com/research/us/health-household/vitamin-d-and-magnesium-supplement/trend)
## **Top vitamin d and magnesium supplement search terms**
- **magnesium vitamin d**21K/yr-9.1%3.7% conv. - **magnesium and vitamin d**20K/yr-4.8%3.4% conv. - **vitamin d magnesium**17K/yr-0.8%2.8% conv. - **magnesium with vitamin d**11K/yr+13.0%2.7% conv. - **omega 3 magnesium vitamin d zinc**5K/yr-26.2%1.8% conv. - **magnesium d3**7K/yr-29.5%5.7% conv. - **magnesium vitamin d3**2K/yr-28.2%2.3% conv. [**All search terms **](https://flapen.com/research/us/health-household/vitamin-d-and-magnesium-supplement/search-terms)
## **Top vitamin d and magnesium supplement 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%$3K10%$5K15%$8K20%$11K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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) [2**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) [3**Bronson Vitamin K2+D3 Magnesium Glycinate Supplement 60 Capsules**Bronson**$9.36**4.6★155 rev](https://www.amazon.com/dp/B0GNN7HRKC) [4**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**4.6★441 rev](https://www.amazon.com/dp/B0FLHSW11D) [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
[**Magnesium Complex for Women & Men 500mg (7-in-1) Magnesium Glycinate with Vegan D3 B6 and Manganese (Made In USA) + Gluconate Citrate Malate Taurate Orotate Carbonate (Oxide-Free) Small Capsule**Etta Vita**$26.28**402 rev4mo ago](https://www.amazon.com/dp/B0G4F3GP5S) [**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) [**YMINGKJ Vitamin D3 K2 5000 IU Softgels with Magnesium Supplement - & 120mcg MK-7 K2 for Bone Health & Immune Support - Non-GMO & Gluten-Free Softgels with MCT Oil- 30 Softgel**YMINGKJ**$9.46**265 rev11mo ago](https://www.amazon.com/dp/B0FMQTM496) [**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)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Bronson Vitamin K2+D3 Magnesium Glycinate Supplement 60 Capsules**Bronson**$9.36**4.6★**▲ 406%**](https://www.amazon.com/dp/B0GNN7HRKC) [**Magnesium Complex for Women & Men 500mg (7-in-1) Magnesium Glycinate with Vegan D3 B6 and Manganese (Made In USA) + Gluconate Citrate Malate Taurate Orotate Carbonate (Oxide-Free) Small Capsule**Etta Vita**$26.28**4.6★**▲ 300%**](https://www.amazon.com/dp/B0G4F3GP5S) [![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★**▲ 111%**](https://www.amazon.com/dp/B0FTZZP7KG) [**Vitamin D3 K2 Gummies 5000IU / 10 000 IU with 500mg Calcium + K2 (MK-7) Magnesium Vitamin C & Zinc For GLP-1 Users Extra Strength - Ultimate Absorption for Bones Muscles & Teeth Vegan 60Count**LILICARE**$28.70**4.6★**▲ 103%**](https://www.amazon.com/dp/B0C1YVTZ8T) [**VEV Corefeel Vitamin D3 K2 10 000 IU Magnesium Supplement 300 Softgels**VEV**$21.34**4.7★**▲ 80%**](https://www.amazon.com/dp/B0F9F5JWXW)
**~~View all trending →~~**
## **What buyers say about vitamin d and magnesium supplement**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**16%
*“overall quality seems solid”*
**Vitamin**15%
*“Great Vitamin”*
**Sleep Quality**8%
*“Better sleep”*
**Magnesium**7%
*“Best Magnesium supplement”*
**Value For Money**7%
*“Great deal”*
**Ease Of Chewing/Swallowing**6%
*“Easy to swallow”*
**Advertised Vs Actual Product**3%
*“As described”*
**Ease Of Use**3%
*“Ease of use”*
**Taste-Overall**3%
*“no weird taste”*
**Efficiency**2%
*“Works well”*
### **What buyers complain about **
**Dosage**11%
*“Dosage check not good”*
**Vitamin**8%
*“Wish it had Vitamin A also”*
**Size-Overall**6%
*“Its huge”*
**Value For Money**6%
*“Waste of money”*
**Magnesium**5%
*“They have a relatively low dose of magnesium”*
**Smell**3%
*“This one has some odor”*
**Ease Of Chewing/Swallowing**3%
*“would be a concern for anyone who has difficulty swallowing”*
**Functionality-Overall**3%
*“Did not help”*
**Sleep Quality**3%
*“it doesnt make me sleepy like I thought”*
**Taste-Overall**2%
*“taste was foul”*
### **Top return reasons **
**Magnesium**22%
**Vitamin**13%
**Functionality-Overall**13%
**Dosage**9%
**Certifications**9%
**Solubility**7%
**Hard Feel**7%
**Calcium**4%
**Heart Health**4%
**Joint Pain**4%
## **Common questions**
- **Is vitamin d and magnesium supplement profitable to sell on Amazon United States?**
- The niche generates $54K/yr across 25 tracked products. 4 of 5 products launched in the last 360 days are still selling. 90-day search growth is -7.1%. Flapen's verdict: Skip it (47/100).
- **How competitive is the vitamin d and magnesium supplement niche?**
- 22 brands and 111 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 60% of demand.
- **What do buyers complain about in vitamin d and magnesium supplement?**
- Top complaints mined from reviews: Dosage, Vitamin, Size-Overall. The return rate is 0.0%.
- **When does demand for vitamin d and magnesium supplement peak?**
- Demand peaks in Aug–Sep–Oct–Nov–Dec; the busiest month runs 2.8× the quietest.
- **What does it cost to enter the vitamin d and magnesium supplement niche?**
- Listings span $5.33–$36.63; the average listing price is $17.98 (sweet spot $15–$100). The average incumbent carries 4,181 reviews — the moat a new listing must climb.
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