calcifediol
Skip itA concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Great$22.64avg listing price — sweet spot $15–$100
Price range
Great$9.80–$39.23cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good4.8%search→purchase rate — share of searches ending in a sale
Review moat
Good1,487.6avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-11.1%90-day search growth — must beat 0% to launch
Market size
Bad$34K$34K/yr · 31K searches
Competition
Bad100%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, calcifediol is a $34K/yr Amazon United States market (31K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 34/100.
Data updated Aug 5, 2026 · scored weekly · How we score niches
calcifediol market data
- Units sold / yr
- 2K–2K
- avg 250–500/product
- Revenue / yr
- $34K–$45K
- units × avg price
- Conversion rate
- 4.8%
- Avg BSR
- #574
- Page quality
- 0%
- Prime
- 80%
- Sponsored
- 80%
- Out of stock
- 0.0%
- Avg brand age
- 85 months
- Avg seller age
- 154 days
Competition & brand share
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 rising
Sellers
8
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
100%
Top 20: 100%
Open market
0%
- Immunotec59%
- VitamoreD28%
- Nike5%
- Vitamatic5%
- Calciven3%
Demand & seasonality
Weekly Amazon search volume, last 74 weeks — -11.1% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.8×
Top calcifediol search terms
- calcifediol14K/yr
- sunray6K/yr
- calciferol3K/yr
- vitamin d injection3K/yr
- calcifediol vitamin d33K/yr
- sunray vitamin d2K/yr
Top calcifediol 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.
All 5 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Sunray Calcifediol Vitamin D Supplement | Fast-Acting Once-Weekly Vitamin D | High Bioavailability 25-Hydroxyvitamin D | Immune Mood Bone & Muscle Support | 4 Capsules
Immunotec$30.704.5★286 rev
VitamoreD Vitamin D Calcifediol 10 mcg | Easy Swallow Tablets | Two-A-Day | 30 Day Supply | 60 Tablets
VitamoreD$15.934.7★55 rev
Nike Sunray Adjust 4 Boys (GS/PS) Shoes Hydrangeas/Comet Blue/Pink 386520-504 (7 M US)
Nike$17.554.4★18 rev
Vitamatic Vitamin D3 50 000 IU Once Weekly 60 Veg Capsules Made in USA
Vitamatic$9.804.8★5,122 rev
Calciven Natural Bone Support Supplement Vegetarian Gluten-Free
Calciven$39.234.4★1,957 rev
Newest
by launch dateSunray Calcifediol Vitamin D Supplement | Fast-Acting Once-Weekly Vitamin D | High Bioavailability 25-Hydroxyvitamin D | Immune Mood Bone & Muscle Support | 4 Capsules
Immunotec$30.70286 rev
VitamoreD Vitamin D Calcifediol 10 mcg | Easy Swallow Tablets | Two-A-Day | 30 Day Supply | 60 Tablets
VitamoreD$15.9355 rev
Calciven Natural Bone Support Supplement Vegetarian Gluten-Free
Calciven$39.231,957 rev
Vitamatic Vitamin D3 50 000 IU Once Weekly 60 Veg Capsules Made in USA
Vitamatic$9.805,122 rev
Nike Sunray Adjust 4 Boys (GS/PS) Shoes Hydrangeas/Comet Blue/Pink 386520-504 (7 M US)
Nike$17.5518 rev
Trending
90-day click momentumNike Sunray Adjust 4 Boys (GS/PS) Shoes Hydrangeas/Comet Blue/Pink 386520-504 (7 M US)
Nike$17.554.4★
Calciven Natural Bone Support Supplement Vegetarian Gluten-Free
Calciven$39.234.4★
Vitamatic Vitamin D3 50 000 IU Once Weekly 60 Veg Capsules Made in USA
Vitamatic$9.804.8★
VitamoreD Vitamin D Calcifediol 10 mcg | Easy Swallow Tablets | Two-A-Day | 30 Day Supply | 60 Tablets
VitamoreD$15.934.7★
Sunray Calcifediol Vitamin D Supplement | Fast-Acting Once-Weekly Vitamin D | High Bioavailability 25-Hydroxyvitamin D | Immune Mood Bone & Muscle Support | 4 Capsules
Immunotec$30.704.5★
What buyers say about calcifediol
What buyers praise and complain about, mined from review topics.What buyers love
“seems to be a good company”
“Great Vitamin”
“Best Calcium”
“Very affordable”
“Effective”
“Most effective for bone support”
“Very easy to use. swallow”
“have used previously and just advertised”
“Easy and helpful”
“The once-weekly dose is super convenient”
What buyers complain about
“Not enough calcium for me”
“My vitamin D was low”
“It's expensive”
“You need to take the proper doses for how bad you are”
“THE pills are VERY big --”
“my back hurts more than it used to”
“This product description is quite confused”
“Did not work”
“it made my stomach lining burn after first use”
“Could be allergic to something in it or was told pill coating could be dissolving to fast”
Top return reasons
Common questions
- Is calcifediol profitable to sell on Amazon United States?
- The niche generates $34K/yr across 5 tracked products. 90-day search growth is -11.1%. Flapen's verdict: Skip it (34/100).
- How competitive is the calcifediol niche?
- 5 brands and 8 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in calcifediol?
- Top complaints mined from reviews: Calcium, Vitamin, Value For Money. The return rate is 0.0%.
- When does demand for calcifediol peak?
- Demand is steady year-round — the busiest month runs 1.8× the quietest.
- What does it cost to enter the calcifediol niche?
- Listings span $9.80–$39.23; the average listing price is $22.64 (sweet spot $15–$100). The average incumbent carries 1,488 reviews — the moat a new listing must climb.