calcium ascorbate
Skip itBrand-locked demand (top 5 brands take 96% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Great11.2%search→purchase rate — share of searches ending in a sale
Avg price
Good$13.17avg listing price — sweet spot $15–$100
Review moat
Good1,325.54avg incumbent reviews — the moat a new listing must climb
Price range
Good$5.60–$25.88cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+7.7%90-day search growth — must beat 0% to launch
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Competition
Bad77%top-5 click share — a locked-up shelf
Market size
Bad$47K$47K/yr · 32K searches
Brand share
Bad96%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, calcium ascorbate is a $47K/yr Amazon United States market (32K searches/yr). The top 5 brands hold 96% of demand. Verdict: Skip it — 41/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
calcium ascorbate market data
- Units sold / yr
- 4K–5K
- avg 250–500/product
- Revenue / yr
- $53K–$66K
- units × avg price
- Conversion rate
- 11.2%
- Avg BSR
- #984
- Page quality
- 0%
- Prime
- 92%
- Sponsored
- 38%
- Out of stock
- 1.0%
- Avg brand age
- 117 months
- Avg seller age
- 166 days
Competition & brand share
The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 falling
Sellers
105
Top-5 brand share
96%
Top 20: 100%
Top-5 click share
77%
Top 20: 100%
Open market
2%
- NOW Foods74%
- BulkSupplements8%
- Nutricost5%
- Pure Encapsulations5%
- INNERVISNUTRITION4%
- Solgar2%
- Open — no brand owns it (1 brand, 2%)
Demand
Weekly Amazon search volume, last 17 weeks — +7.7% search growth over the last 90 days.Top calcium ascorbate search terms
- calcium ascorbate11K/yr
- vitamin c calcium ascorbate5K/yr
- now vitamin c 500mg6K/yr
- calcium ascorbate vitamin c5K/yr
- now c-5002K/yr
- calcium ascorbate powder3K/yr
Top calcium ascorbate 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 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
NOW Foods Supplements Vitamin C-500 Calcium Ascorbate Antioxidant Protection* 250 Veg Capsules
NOW Foods$13.694.8★1,397 rev
NOW Supplements Vitamin C-500 with Rose Hips Antioxidant Protection* 250 Tablets
NOW Foods$10.094.8★6,145 rev
NOW Foods Supplements Calcium Ascorbate Powder Buffered Antioxidant Protection* 8-Ounce
NOW Foods$10.934.7★386 rev
BulkSupplements.com Calcium Ascorbate Powder - Buffered Vitamin C Supplement Calcium Powder - Vegan & Gluten Free 1g per Serving 500g (1.1 lbs) (Pack of 1)
BulkSupplements$19.524.6★335 rev
Nutricost Calcium Ascorbate Powder 250G (Unflavored) 250 Servings GMO-Free
Nutricost$14.414.0★43 rev
Newest
by launch date
C-Salts Pure Calcium Ascorbate Vitamin C Powder (8 oz)
C-Salts$11.9734 rev
Nutricost Calcium Ascorbate Powder 250G (Unflavored) 250 Servings GMO-Free
Nutricost$14.4143 rev
Buffered Vitamin C 1500mg Non-Acidic Stomach Friendly Calcium Ascorbate Capsules for Immune Support Gentle on Digestive System - 150 Veggie Caps by Innervis Nutrition
INNERVISNUTRITION$16.2137 rev
Pure Encapsulations Buffered Ascorbic Acid Capsules | Vitamin C for Sensitive Individuals* | 90 Capsules
Pure Encapsulations$25.88745 rev
BulkSupplements.com Calcium Ascorbate Powder - Buffered Vitamin C Supplement Calcium Powder - Vegan & Gluten Free 1g per Serving 500g (1.1 lbs) (Pack of 1)
BulkSupplements$19.52335 rev
Trending
90-day click momentumC-Salts Pure Calcium Ascorbate Vitamin C Powder (8 oz)
C-Salts$11.974.2★
BulkSupplements.com Calcium Ascorbate Powder - Buffered Vitamin C Supplement Calcium Powder - Vegan & Gluten Free 1g per Serving 500g (1.1 lbs) (Pack of 1)
BulkSupplements$19.524.6★
NOW Supplements Vitamin C-500 Antioxidant Protection* Cherry Flavor 100 Chewable Lozenges
NOW Foods$9.804.7★
NOW Foods Supplements Vitamin C-500 Calcium Ascorbate Antioxidant Protection* 250 Veg Capsules
NOW Foods$13.694.8★
Pure Encapsulations Buffered Ascorbic Acid Capsules | Vitamin C for Sensitive Individuals* | 90 Capsules
Pure Encapsulations$25.884.8★
What buyers say about calcium ascorbate
What buyers praise and complain about, mined from review topics.What buyers love
“QUALITY is EXCELLENT”
“Good supplements”
“Good price”
“No Stomach Upset”
“It has such a great taste--you can taste the acerola cherries”
“Very large, I bite in half and then chew”
“Easy and good”
“knock a cold out”
“Pur brand most natural”
“Vitamin C. Very good flavor”
What buyers complain about
“It tastes terrible”
“Does Not Dissolve”
“Inactive does nothing”
“This stuff is sooooo hard to drink”
“This Vitamin C product caused severe bloating”
“Note:ANY calcium ascorbate product can cause a blood pressure drop in some people”
“The capsules are too hard”
Top return reasons
Common questions
- Is calcium ascorbate profitable to sell on Amazon United States?
- The niche generates $47K/yr across 13 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +7.7%. Flapen's verdict: Skip it (41/100).
- How competitive is the calcium ascorbate niche?
- 7 brands and 105 sellers compete. The top 5 products take 77% of clicks and top 5 brands hold 96% of demand.
- What do buyers complain about in calcium ascorbate?
- Top complaints mined from reviews: Taste-Overall, Solubility, Functionality-Overall. The return rate is 0.0%.
- What does it cost to enter the calcium ascorbate niche?
- Listings span $5.60–$25.88; the average listing price is $13.17 (sweet spot $15–$100). The average incumbent carries 1,326 reviews — the moat a new listing must climb.