---
title: "Kirkland Calcium Citrate Magnesium and Zinc with Vitamin D3 — Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/health-household/kirkland-calcium-citrate-magnesium-and-zinc-with-vitamin-d3"
last_updated: "2026-08-12T14:14:19.851Z"
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meta:
description: "Amazon product research for kirkland calcium citrate magnesium and…: demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for kirkland calcium citrate magnesium and…: demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Kirkland Calcium Citrate Magnesium and Zinc with Vitamin D3 — Amazon US Product Research"
---
# **Kirkland Calcium Citrate Magnesium and Zinc with Vitamin D3**
**Skip it**
A small market ($27K/yr) — this niche doesn't clear our bar today.
Market size 7Growth 57Conversion 55Competition 38Returns 100Price range 78Avg price 83Brand share 20Review moat 22Quality gap 19
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$18.17**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$6.62–$47.25**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Good****+30.7%**
90-day search growth — must beat 0% to launch
**Conversion**
**Good****4.6%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Okay****62%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****9,171.78**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$27K**
$27K/yr · 32K searches
## **Is kirkland calcium citrate magnesium and zinc with vitamin d3 profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, kirkland calcium citrate magnesium and zinc with vitamin d3 is a $27K/yr Amazon United States market (32K searches/yr). The top 5 brands hold 92% of demand. Verdict: Skip it — 44/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **kirkland calcium citrate magnesium and zinc with vitamin d3 market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **3K–4K**
- avg 250–500/product
- **Revenue / yr**
- **$55K–$73K**
- units × avg price
- **Conversion rate**
- **4.6%**
- **Avg BSR**
- **#376**
- **Page quality**
- **0%**
- **Prime**
- **56%**
- **Sponsored**
- **33%**
- **Out of stock**
- **0.9%**
- **Avg brand age**
- **81 months**
- **Avg seller age**
- **158 days**
## **Competition: brands, sellers & click share**
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**8 **▲rising
**Sellers**
**176**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**62%**
Top 20: 100%
**Open market**
**5%**
- KIRKLAND55% - Nature Made16% - Generic8% - Nature's Bounty7% - 21st Century5% - ikj3% - Open — no brand owns it (2 brands, 5%)
## **kirkland calcium citrate magnesium and zinc with vitamin d3 demand & seasonality**
Weekly Amazon search volume, last 100 weeks — +30.7% search growth over the last 90 days.
900700Holiday '24Prime Day '25Black Friday '25Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/health-household/kirkland-calcium-citrate-magnesium-and-zinc-with-vitamin-d3/trend)
## **Top kirkland calcium citrate magnesium and zinc with vitamin d3 search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **kirkland calcium 600 mg with vitamin d3**13K/yr+39.7%6.3% conv. - **kirkland calcium**15K/yr+20.0%4.6% conv. - **calcium kirkland**4K/yr+35.3%3.2% conv. [**All search terms **](https://flapen.com/research/us/health-household/kirkland-calcium-citrate-magnesium-and-zinc-with-vitamin-d3/search-terms)
## **Top kirkland calcium citrate magnesium and zinc with vitamin d3 products & what they sell for**
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%5%$1K10%$3K15%$4K20%$5K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Kirkland Signature Calcium Citrate Magnesium and Zinc 500 Tablets**KIRKLAND**$18.87**4.7★3,741 rev](https://www.amazon.com/dp/B07N798Y1J) [2**Kirkland Signature Chewable Calcium with Vitamin D3 Adult Gummies 120 ct x 1 Bottle**KIRKLAND**$13.59**4.6★2,800 rev](https://www.amazon.com/dp/B00F4MD808) [3**Nature Made Calcium 600 mg with Vitamin D3 Dietary Supplement for Bone Support 220 Tablets**Nature Made**$13.72**4.7★27,362 rev](https://www.amazon.com/dp/B002FH5I0I) [4**Kirkland Signature Calcium 600 mg+D3 500-Count Tablets**KIRKLAND**$16.39**4.7★1,315 rev](https://www.amazon.com/dp/B002RL8FBQ) [5**Calcium Citrate 500mg with Magnesium Zinc and Vitamin D3 - Bone Strength & Immune Support Supplement - Supports Healthy Teeth & Muscle Contraction - USP Verified - 500 Tablets**Generic**$30.70**4.8★8 rev](https://www.amazon.com/dp/B0GNP6JPHT)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Calcium Citrate 500mg with Magnesium Zinc and Vitamin D3 - Bone Strength & Immune Support Supplement - Supports Healthy Teeth & Muscle Contraction - USP Verified - 500 Tablets**Generic**$30.70**8 rev5mo ago](https://www.amazon.com/dp/B0GNP6JPHT) [**ikj Calcium 600 mg with Vitamin D3 Dietary Supplement 500 Tablets**ikj**$18.10**277 rev3y ago](https://www.amazon.com/dp/B0C73QNBGV) [**Nutricost Calcium with Vitamin D 240 Tablets - Calcium (1200mg) Vitamin D (50mcg) Per Serving - Non-GMO Gluten Free**Nutricost**$15.70**2,374 rev5y ago](https://www.amazon.com/dp/B0988B9WH4) [**Kirkland Signature Calcium Citrate Magnesium and Zinc 500 Tablets**KIRKLAND**$18.87**3,741 rev7y ago](https://www.amazon.com/dp/B07N798Y1J) [**Kirkland Signature Chewable Calcium with Vitamin D3 Adult Gummies 120 ct x 1 Bottle**KIRKLAND**$13.59**2,800 rev7y ago](https://www.amazon.com/dp/B00F4MD808)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Calcium Citrate 500mg with Magnesium Zinc and Vitamin D3 - Bone Strength & Immune Support Supplement - Supports Healthy Teeth & Muscle Contraction - USP Verified - 500 Tablets**Generic**$30.70**4.8★**▲ 274%**](https://www.amazon.com/dp/B0GNP6JPHT) [**Kirkland Signature Extra Strength D3 50 mcg. 600 Softgels (2 Pack)**KIRKLAND**$29.35**4.8★**▲ 177%**](https://www.amazon.com/dp/B01N5J2998) [**21st Century Calcium Plus D Supplement Tablet 600 mg 400 Count**21st Century**$15.23**4.7★**▲ 150%**](https://www.amazon.com/dp/B00IQB6VE4) [**Nature Made Calcium 600 mg with Vitamin D3 Dietary Calcium Supplement for Bone Support 100 Softgels**Nature Made**$12.95**4.6★**▲ 141%**](https://www.amazon.com/dp/B001F1DWZS) [**Natures Bounty Calcium Carbonate & Vitamin D Supports Immune Health & Bone Health 600mg Calcium & 800IU Vitamin D3 250 Tablets**Nature's Bounty**$10.68**4.7★**▲ 115%**](https://www.amazon.com/dp/B0012D38G2)
**~~View all trending →~~**
## **What reviews say buyers love and hate about kirkland calcium citrate magnesium and zinc with vitamin d3**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**17%
*“always consistent quality”*
**Value For Money**17%
*“Good value for money”*
**Calcium**16%
*“Calcium works well”*
**Vitamin**12%
*“Great value and vitamins”*
**Advertised Vs Actual Product**7%
*“As advertised”*
**Ease Of Chewing/Swallowing**4%
*“I have no problem swallowing”*
**Efficiency**3%
*“Effective product”*
**Ease Of Use**3%
*“Ease of use”*
**Joint Pain**2%
*“this really really helped a lot especially with my joint pain too”*
**Taste-Overall**2%
*“Gummies are great@ These chewables are great tasting”*
### **What buyers complain about **
**Size-Overall**22%
*“This tablets are a little large”*
**Ease Of Chewing/Swallowing**13%
*“painful to swallow”*
**Calcium**10%
*“bad product this is calcium”*
**Dosage**4%
*“tablet not scored to break in half dose adjustment needed”*
**Vitamin**3%
*“Vitamins r too big to swallow”*
**Nutritional Content**3%
*“Total crap for your body”*
**Value For Money**2%
*“Wish it were cheaper”*
**Taste-Overall**2%
*“Artificial after taste”*
**Quality-Overall**1%
*“Ver poor quality”*
**Acid Regulator/Stomach Ache Relief**1%
*“stomach pains”*
### **Top return reasons **
**Calcium**35%
**Size-Overall**15%
**Ease Of Chewing/Swallowing**13%
**Vitamin**6%
**Dosage**6%
**Magnesium**6%
**Charging**3%
**Weight Heavy**3%
**Advertised Vs Actual Product**3%
**Acid Regulator/Stomach Ache Relief**3%
## **Common kirkland calcium citrate magnesium and zinc with vitamin d3 questions**
- **Is kirkland calcium citrate magnesium and zinc with vitamin d3 profitable to sell on Amazon United States?**
- The niche generates $27K/yr across 18 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +30.7%. Flapen's verdict: Skip it (44/100).
- **How competitive is the kirkland calcium citrate magnesium and zinc with vitamin d3 niche?**
- 8 brands and 176 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in kirkland calcium citrate magnesium and zinc with vitamin d3?**
- Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Calcium. The return rate is 0.0%.
- **When does demand for kirkland calcium citrate magnesium and zinc with vitamin d3 peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the kirkland calcium citrate magnesium and zinc with vitamin d3 niche?**
- Listings span $6.62–$47.25; the average listing price is $18.17 (sweet spot $15–$100). The average incumbent carries 9,172 reviews — the moat a new listing must climb.
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