Z Stack Dr. Zelenko Vitamin
FailThe top 5 products take 100% of clicks, so Z Stack Dr. Zelenko Vitamin is a Fail.
- Flapen Score
- 38 / 100Ranks 13,006 of 14,768 Health & Household niches · −11 vs the category median of 4938
- Market size
- $94K/yr25K searches / yr
- 90-day growth
- -24.0%search demand this quarter
- Competition
- 100%top-5 click share · 3 brands · 7 sellers
Flapen Score
Z Stack Dr. Zelenko Vitamin against its category
The dotted line is the Health & Household average. Past it, Z Stack Dr. Zelenko Vitamin is stronger. Inside it, weaker.
Market
The Z Stack Dr. Zelenko Vitamin market on Amazon at a glance
Shoppers on Amazon United States searched for Z Stack Dr. Zelenko Vitamin 25K times last year and spent an estimated $94K. All 3 brands take every click. Demand peaks in Jan–Feb–Dec. Flapen scores it 38 out of 100, a Fail.
01 · Demand
An estimated 13.7% of those searches ended in a purchase.
Shoppers searched for this 25K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 13.7% of those searches ended in a purchase. Searches in the last 90 days moved -24.0% against the 90 days before. Searches, conversion and average price together put the market at an estimated $94K a year.
- Searches, last 12 months
- 25K
- Growth, 90 days vs prior 90
- -24.0%
- Conversion, latest week
- 13.7%
- Market size, estimated
- $94Ka year
- Peak month
- January4.3× the quietest month
- Top search term
- zstack6K searches a year
02 · Price
A sale here is worth $27.70.
Listings sell for $27.70 on average, from $21.49 to $33.77. Amazon reports units sold in ranges. This niche sold 2K to 3K a year. The average listing sells 750 to 1,000 of them. At $27.70 that is $21K to $28K a year per listing.
- Average price
- $27.70inside the $15 to $100 sweet spot
- Price range
- $21.49–$33.77
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–3K
- Units per listing a year
- 750–1,000
- Revenue per listing a year
- $21K–$28K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
100% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #23 within Antioxidants. It carries 3,698 reviews at 4.67 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 100%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #23in Antioxidants
- Average rating
- 4.67 starsAmazon United States average 4.42 stars
- Average reviews
- 3,698per listing
- Listings tracked
- 3
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 53 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 53 months
Products
Top Z Stack Dr. Zelenko Vitamin products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 25, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Zinc Quercetin 500mg with Vitamin C Vitamin D3 Bromelain Immune Support High Potency Quercetin Zinc Supplement ZQV by SPARTIS (Pack of 1 Bottle at 120-Caps)
- Price
- $33.77
- Rating
- 4.7/5
- Reviews
- 2,187
- Age
- 5y ago

NatureBell Zinc Quercetin with Vitamin C & D3 240 Capsules | Quercetin 1 000mg + Zinc 50mg + Vitamin C 250mg + Vitamin D3 5 000 IU | 4-in-1 Advanced Immune & Lung Support | ZincVanta Formula
- Price
- $21.49
- Rating
- 4.7/5
- Reviews
- 1,482
- Age
- 6y ago

Q Defend Quercetin Supplement with Zinc Vitamin C Vitamin D Elderberry Turmeric Black Pepper Garlic Ginger Sea Moss Lysine Stinging Nettle Reishi Mushroom Immune Support 60 Capsules
- Price
- $27.85
- Rating
- 4.6/5
- Reviews
- 7,424
- Age
- 4y ago
Trending
estimated 90-day click momentum
Zinc Quercetin 500mg with Vitamin C Vitamin D3 Bromelain Immune Support High Potency Quercetin Zinc Supplement ZQV by SPARTIS (Pack of 1 Bottle at 120-Caps)
- Price
- $33.77
- Rating
- 4.7/5
- Reviews
- 2,187
- Age
- 5y ago

NatureBell Zinc Quercetin with Vitamin C & D3 240 Capsules | Quercetin 1 000mg + Zinc 50mg + Vitamin C 250mg + Vitamin D3 5 000 IU | 4-in-1 Advanced Immune & Lung Support | ZincVanta Formula
- Price
- $21.49
- Rating
- 4.7/5
- Reviews
- 1,482
- Age
- 6y ago

Q Defend Quercetin Supplement with Zinc Vitamin C Vitamin D Elderberry Turmeric Black Pepper Garlic Ginger Sea Moss Lysine Stinging Nettle Reishi Mushroom Immune Support 60 Capsules
- Price
- $27.85
- Rating
- 4.6/5
- Reviews
- 7,424
- Age
- 4y ago
Newest
by launch date
Q Defend Quercetin Supplement with Zinc Vitamin C Vitamin D Elderberry Turmeric Black Pepper Garlic Ginger Sea Moss Lysine Stinging Nettle Reishi Mushroom Immune Support 60 Capsules
- Price
- $27.85
- Rating
- 4.6/5
- Reviews
- 7,424
- Age
- 4y ago

Zinc Quercetin 500mg with Vitamin C Vitamin D3 Bromelain Immune Support High Potency Quercetin Zinc Supplement ZQV by SPARTIS (Pack of 1 Bottle at 120-Caps)
- Price
- $33.77
- Rating
- 4.7/5
- Reviews
- 2,187
- Age
- 5y ago

NatureBell Zinc Quercetin with Vitamin C & D3 240 Capsules | Quercetin 1 000mg + Zinc 50mg + Vitamin C 250mg + Vitamin D3 5 000 IU | 4-in-1 Advanced Immune & Lung Support | ZincVanta Formula
- Price
- $21.49
- Rating
- 4.7/5
- Reviews
- 1,482
- Age
- 6y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 100% of clicks. A locked shelf that new listings rarely crack.
Brands
3 falling
Sellers
7
Est. top-5 brand share
100%
Top 20: 100%
Est. top-5 click share
100%
Top 20: 100%
Open market
0%
- SPARTIS77%
- NatureBell12%
- Clean Nutraceuticals11%
Demand
Z Stack Dr. Zelenko Vitamin search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan, Feb, Dec · busiest ÷ quietest = 4.3×
Search terms
Top Z Stack Dr. Zelenko Vitamin search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- zstack6K/yr
- z stack vitamin zelenko5K/yr
- zinc quercetin vitamin c and d3 immune complex5K/yr
- z stack5K/yr
- zstacklife vitamin dr zelenko2K/yr
- spartis zinc quercetin vitamin c and d3 immune complex2K/yr
Reviews and returns
What reviews say buyers love and hate about Z Stack Dr. Zelenko Vitamin
We read the reviews and the return reasons for every product selling here.
“They are a bit pricey”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
17 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Z Stack Dr. Zelenko Vitamin questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









