Is ester c 500mg profitable to sell on Amazon United States?

The niche generates $524K/yr across 8 tracked products. 90-day search growth is -12.2%. Flapen's verdict: Skip it (43/100).

How competitive is the ester c 500mg niche?

3 brands and 35 sellers compete. The top 5 products take 92% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in ester c 500mg?

Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Vitamin. The return rate is 0.0%.

When does demand for ester c 500mg peak?

Demand peaks in Aug–Sep–Oct–Nov; the busiest month runs 3.5× the quietest.

What does it cost to enter the ester c 500mg niche?

Listings span $6.63–$33.07; the average listing price is $19.43 (sweet spot $15–$100). The average incumbent carries 7,081 reviews — the moat a new listing must climb.

ester c 500mg

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Conversion

Incredible30.1%

search→purchase rate — share of searches ending in a sale

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Great$19.43

avg listing price — sweet spot $15–$100

Price range

Good$6.63–$33.07

cheapest to priciest tracked listing — scored on the share inside $15–$100

Market size

Good$524K

$524K/yr · 90K searches

Review moat

Bad7,080.63

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-12.2%

90-day search growth — must beat 0% to launch

Quality gap

Bad4.8★

avg incumbent rating — lower means beatable quality

Competition

Bad92%

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, ester c 500mg is a $524K/yr Amazon United States market (90K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Aug–Sep–Oct–Nov. Verdict: Skip it — 43/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

ester c 500mg market data

Units sold / yr: 30K–40K; avg 3,000–4,000/product
Revenue / yr: $583K–$777K; units × avg price
Conversion rate: 30.1%
Avg BSR: #476
Page quality: 0%
Prime: 100%
Sponsored: 38%
Out of stock: 0.0%
Avg brand age: 121 months
Avg seller age: 159 days

Competition & brand share

The top 5 products capture 92% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 flat

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

92%

Top 20: 100%

Open market

Ester-C48%
American Health48%
Solgar4%
Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -12.2% search growth over the last 90 days.

Peak months: Aug, Sep, Oct, Nov · busiest ÷ quietest = 3.5×

Open Trend

Top ester c 500mg search terms

ester c 500mg73K/yr -12.6%27.7% conv.
ester c 500mg capsules8K/yr -17.9%22.4% conv.
ester-c 500mg4K/yr -4.5%29.9% conv.
ester c 500 mg3K/yr -0.6%28.1% conv.
ester c 5003K/yr -6.6%25.6% conv.

All search terms

Top ester c 500mg 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Ester-C 500 mg 24 Hour Vitamin C Tablets for Immune Support Vitamin C Supplement 90 Count

Ester-C$6.634.8★8,786 rev

American Health Ester-C with Citrus Bioflavonoids Capsules - Gentle On Stomach Non-Acidic Vitamin C - 500 mg 60 Servings 120 Count

American Health$13.134.8★9,974 rev

American Health Ester-C with Citrus Bioflavonoids Capsules - 24-Hour Immune Support Gentle On Stomach Non-Acidic Vitamin C - Non-GMO Gluten-Free - 500 mg 240 Count 120 Servings

American Health$24.694.8★9,974 rev

Ester-C Vitamin C 1000 mg Coated Tablets Immune System Booster Stomach-Friendly Supplement 120 Count

Ester-C$14.664.7★20,436 rev

American Health Ester-C Vitamin C 500 mg Coated Tablets Immune System Booster Stomach-Friendly Supplement 225 Count

American Health$17.534.8★1,094 rev

Newest

by launch date

Ester-C 500 mg 24 Hour Vitamin C Tablets for Immune Support Vitamin C Supplement 90 Count

Ester-C$6.638,786 rev

13y ago

American Health Ester-C Vitamin C 500 mg Coated Tablets Immune System Booster Stomach-Friendly Supplement 225 Count

American Health$17.531,094 rev

18y ago

Ester-C Vitamin C 1000 mg Coated Tablets Immune System Booster Stomach-Friendly Supplement 120 Count

Ester-C$14.6620,436 rev

18y ago

Solgar Ester-C Plus 500 mg Vitamin C (Ascorbate Complex) 250 Vegetable Capsules - Gentle & Non Acidic - Antioxidant & Immune Support - Non GMO Vegan Gluten Free Kosher - 250 Servings

Solgar$20.114,547 rev

20y ago

American Health Ester-C with Citrus Bioflavonoids Capsules - 24-Hour Immune Support Gentle On Stomach Non-Acidic Vitamin C - Non-GMO Gluten-Free - 500 mg 240 Count 120 Servings

American Health$24.699,974 rev

22y ago

What buyers say about ester c 500mg

What buyers praise and complain about, mined from review topics.

What buyers love

Vitamin23%

“This vitamin c is really effective”

Acid Regulator/Stomach Ache Relief17%

“Great and no stomach cramps”

Ease Of Chewing/Swallowing9%

“EASY TO SWALLOW”

Quality-Overall8%

“Excellent product”

Value For Money7%

“Value for money”

Regulates Digestion5%

“because it does not cause digestive problem like some Vitamin C products do”

Advertised Vs Actual Product5%

“Does exactly as advertised”

Immunity Booster4%

“These are great for immune systems”

Cold Relief3%

“I swear this shortens my cold”

Nutritional Content2%

“Keep you healthy”

What buyers complain about

Size-Overall25%

“They are huge”

Ease Of Chewing/Swallowing20%

“Too big for me to swallow”

Vitamin9%

“Do not buy vitamins”

Heart Health5%

“Causing heartburn”

Vegan/Organic5%

“Not Kosher/Halal”

Ingredients-Overall5%

“No don't eat maltodextrin”

Side Effects4%

“I have consumed it for more than 3 weeks”

Hard Feel2%

“Pills are hard”

Dosage2%

“Difficult to find the 500mg”

Value For Money2%

“Waste of money”

Top return reasons

Value For Money50%

Ingredients-Overall25%

Advertised Vs Actual Product17%

Side Effects8%

Common questions

Is ester c 500mg profitable to sell on Amazon United States?: The niche generates $524K/yr across 8 tracked products. 90-day search growth is -12.2%. Flapen's verdict: Skip it (43/100).
How competitive is the ester c 500mg niche?: 3 brands and 35 sellers compete. The top 5 products take 92% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in ester c 500mg?: Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Vitamin. The return rate is 0.0%.
When does demand for ester c 500mg peak?: Demand peaks in Aug–Sep–Oct–Nov; the busiest month runs 3.5× the quietest.
What does it cost to enter the ester c 500mg niche?: Listings span $6.63–$33.07; the average listing price is $19.43 (sweet spot $15–$100). The average incumbent carries 7,081 reviews — the moat a new listing must climb.