Is ester c 1000mg capsules profitable to sell on Amazon United States?

The niche generates $878K/yr across 10 tracked products. 90-day search growth is -9.6%. Flapen's verdict: Skip it (47/100).

How competitive is the ester c 1000mg capsules niche?

3 brands and 37 sellers compete. The top 5 products take 80% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in ester c 1000mg capsules?

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

When does demand for ester c 1000mg capsules peak?

Demand peaks in Jan–Feb–Mar–Dec; the busiest month runs 12.8× the quietest.

What does it cost to enter the ester c 1000mg capsules niche?

Listings span $6.63–$28.06; the average listing price is $18.17 (sweet spot $15–$100). The average incumbent carries 11,037 reviews — the moat a new listing must climb.

ester c 1000mg capsules

Skip it

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

Conversion

Incredible21.0%

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

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Great$18.17

avg listing price — sweet spot $15–$100

Market size

Great$878K

$878K/yr · 231K searches

Price range

Good$6.63–$28.06

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

Review moat

Bad11,037.4

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-9.6%

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

Competition

Bad80%

top-5 click share — a locked-up shelf

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, ester c 1000mg capsules is a $878K/yr Amazon United States market (231K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Mar–Dec. Verdict: Skip it — 47/100.

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

ester c 1000mg capsules market data

Units sold / yr: 50K–60K; avg 5,000–6,000/product
Revenue / yr: $909K–$1.1M; units × avg price
Conversion rate: 21.0%
Avg BSR: #216
Page quality: 0%
Prime: 100%
Sponsored: 80%
Out of stock: 0.0%
Avg brand age: 112 months
Avg seller age: 154 days

Competition & brand share

The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

80%

Top 20: 100%

Open market

Ester-C62%
American Health34%
Solgar4%

Demand & seasonality

Weekly Amazon search volume, last 70 weeks — -9.6% search growth over the last 90 days.

Peak months: Jan, Feb, Mar, Dec · busiest ÷ quietest = 12.8×

Open Trend

Top ester c 1000mg capsules search terms

ester c96K/yr -7.3%18.1% conv.
ester c 1000mg54K/yr -0.8%21.6% conv.
esterc vitamin c 1000 mg capsules13K/yr -7.0%25.8% conv.
ester c 1000mg capsules21K/yr -14.9%20.9% conv.
ester-c13K/yr +7.3%8.3% conv.
esther c 10005K/yr +12.1%21.3% conv.
vitamin c ester5K/yr -9.3%10.9% conv.
esther c5K/yr -23.2%22.1% conv.
ester-c 1000mg4K/yr +2.8%25.8% conv.
stomach friendly vitamin c2K/yr -4.9%2.8% conv.

All search terms

Top ester c 1000mg capsules 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 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

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

Ester-C$14.664.7★20,436 rev

Ester-C American Health with Citrus Bioflavonoids Capsules - 24-Hour Immune Support Gentle On Stomach Non-Acidic Vitamin C - Non-GMO Gluten-Free - 1000 mg 90 Count

American Health$20.534.8★5,675 rev

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

Ester-C Vitamin C 1 000 mg 90 Coated Tablets

Ester-C$13.684.7★20,436 rev

Newest

by launch date

American Health Ester-C 1000 mg with Bioflavonoids Capsules 24Hour Immune Support Gentle on Stomach NonAcidic Vitamin C NonGMO Gluten-Free Servings Citrus 105 Count

American Health$23.905,675 rev

5y ago

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

Ester-C Vitamin C 1 000 mg 90 Coated Tablets

Ester-C$13.6820,436 rev

16y ago

Ester-C American Health with Citrus Bioflavonoids Capsules - 24-Hour Immune Support Gentle On Stomach Non-Acidic Vitamin C - Non-GMO Gluten-Free - 1000 mg 90 Count

American Health$20.535,675 rev

17y 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

What buyers say about ester c 1000mg capsules

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

What buyers love

Vitamin24%

“Best vitamins”

Quality-Overall11%

“Excellent product”

Acid Regulator/Stomach Ache Relief11%

“Great and no stomach cramps”

Value For Money7%

“Affordable”

Ease Of Chewing/Swallowing7%

“EASY TO SWALLOW”

Advertised Vs Actual Product6%

“Does exactly as advertised”

Immunity Booster5%

“Good immune support”

Cold Relief4%

“it can keep you away from colds and flu”

Regulates Digestion3%

“Stomach friendly”

Durability2%

“Been using it for years”

What buyers complain about

Size-Overall33%

“They are huge”

Ease Of Chewing/Swallowing21%

“Too big for me to swallow”

Vitamin7%

“Do not buy vitamins”

Ingredients-Overall5%

“This product did not show other ingredients on the label that was shown on the item page”

Heart Health5%

“If something that is supposed to maintain health makes you feel worse”

Vegan/Organic4%

“Not Kosher/Halal”

Hard Feel3%

“They are also hard like a rock”

Dosage3%

“Its difficult to find 1000 mg tablet”

Acid Regulator/Stomach Ache Relief2%

“However, once it reached my intestines, this stuff triggered some real indigestion”

Side Effects1%

“Not without side effects”

Top return reasons

Value For Money60%

Advertised Vs Actual Product20%

Ingredients-Overall10%

Side Effects10%

Common questions

Is ester c 1000mg capsules profitable to sell on Amazon United States?: The niche generates $878K/yr across 10 tracked products. 90-day search growth is -9.6%. Flapen's verdict: Skip it (47/100).
How competitive is the ester c 1000mg capsules niche?: 3 brands and 37 sellers compete. The top 5 products take 80% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in ester c 1000mg capsules?: Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Vitamin. The return rate is 0.0%.
When does demand for ester c 1000mg capsules peak?: Demand peaks in Jan–Feb–Mar–Dec; the busiest month runs 12.8× the quietest.
What does it cost to enter the ester c 1000mg capsules niche?: Listings span $6.63–$28.06; the average listing price is $18.17 (sweet spot $15–$100). The average incumbent carries 11,037 reviews — the moat a new listing must climb.