Kirkland Calcium Citrate Magnesium and Zinc with Vitamin D3
Skip itA small market ($27K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Great$18.17avg listing price — sweet spot $15–$100
Price range
Great$6.62–$47.25cheapest 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
Good4.6%search→purchase rate — share of searches ending in a sale
Competition
Okay62%top-5 click share — leaders hold, buyers still browse
Review moat
Bad9,171.78avg incumbent reviews — the moat a new listing must climb
Brand share
Bad92%top-5 brand share — brand-locked demand
Quality gap
Bad4.7★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
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.No pronounced peak months · busiest ÷ quietest = 1.4×
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 d313K/yr
- kirkland calcium15K/yr
- calcium kirkland4K/yr
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.
All 18 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Kirkland Signature Calcium Citrate Magnesium and Zinc 500 Tablets
KIRKLAND$18.874.7★3,741 rev
Kirkland Signature Chewable Calcium with Vitamin D3 Adult Gummies 120 ct x 1 Bottle
KIRKLAND$13.594.6★2,800 rev
Nature Made Calcium 600 mg with Vitamin D3 Dietary Supplement for Bone Support 220 Tablets
Nature Made$13.724.7★27,362 rev
Kirkland Signature Calcium 600 mg+D3 500-Count Tablets
KIRKLAND$16.394.7★1,315 rev
Calcium Citrate 500mg with Magnesium Zinc and Vitamin D3 - Bone Strength & Immune Support Supplement - Supports Healthy Teeth & Muscle Contraction - USP Verified - 500 Tablets
Generic$30.704.8★8 rev
Newest
by launch dateCalcium Citrate 500mg with Magnesium Zinc and Vitamin D3 - Bone Strength & Immune Support Supplement - Supports Healthy Teeth & Muscle Contraction - USP Verified - 500 Tablets
Generic$30.708 rev
ikj Calcium 600 mg with Vitamin D3 Dietary Supplement 500 Tablets
ikj$18.10277 rev
Nutricost Calcium with Vitamin D 240 Tablets - Calcium (1200mg) Vitamin D (50mcg) Per Serving - Non-GMO Gluten Free
Nutricost$15.702,374 rev
Kirkland Signature Calcium Citrate Magnesium and Zinc 500 Tablets
KIRKLAND$18.873,741 rev
Kirkland Signature Chewable Calcium with Vitamin D3 Adult Gummies 120 ct x 1 Bottle
KIRKLAND$13.592,800 rev
Trending
90-day click momentumCalcium Citrate 500mg with Magnesium Zinc and Vitamin D3 - Bone Strength & Immune Support Supplement - Supports Healthy Teeth & Muscle Contraction - USP Verified - 500 Tablets
Generic$30.704.8★
Kirkland Signature Extra Strength D3 50 mcg. 600 Softgels (2 Pack)
KIRKLAND$29.354.8★
21st Century Calcium Plus D Supplement Tablet 600 mg 400 Count
21st Century$15.234.7★
Nature Made Calcium 600 mg with Vitamin D3 Dietary Calcium Supplement for Bone Support 100 Softgels
Nature Made$12.954.6★
Natures Bounty Calcium Carbonate & Vitamin D Supports Immune Health & Bone Health 600mg Calcium & 800IU Vitamin D3 250 Tablets
Nature's Bounty$10.684.7★
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
“always consistent quality”
“Good value for money”
“Calcium works well”
“Great value and vitamins”
“As advertised”
“I have no problem swallowing”
“Effective product”
“Ease of use”
“this really really helped a lot especially with my joint pain too”
“Gummies are great@ These chewables are great tasting”
What buyers complain about
“This tablets are a little large”
“painful to swallow”
“bad product this is calcium”
“tablet not scored to break in half dose adjustment needed”
“Vitamins r too big to swallow”
“Total crap for your body”
“Wish it were cheaper”
“Artificial after taste”
“Ver poor quality”
“stomach pains”
Top return reasons
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.