Is immune c profitable to sell on Amazon United States?

The niche generates $220K/yr across 11 tracked products. 90-day search growth is -13.5%. Flapen's verdict: Skip it (41/100).

How competitive is the immune c niche?

4 brands and 67 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in immune c?

Top complaints mined from reviews: Taste-Overall, Size-Overall, Flavor. The return rate is 0.0%.

When does demand for immune c peak?

Demand peaks in Apr–May–Jun–Jul; the busiest month runs 2.8× the quietest.

What does it cost to enter the immune c niche?

Listings span $8.57–$27.51; the average listing price is $19.14 (sweet spot $15–$100). The average incumbent carries 8,818 reviews — the moat a new listing must climb.

Immune C

Skip it

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

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Great10.5%

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

Avg price

Great$19.14

avg listing price — sweet spot $15–$100

Price range

Good$8.57–$27.51

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

Market size

Okay$220K

$220K/yr · 109K searches

Review moat

Bad8,817.64

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-13.5%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad82%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Is immune c profitable on Amazon?

According to Flapen's Amazon United States niche tracking, immune c is a $220K/yr Amazon United States market (109K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Skip it — 41/100.

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

immune c market size & sales

Units sold, revenue, conversion and listing quality across the tracked shelf.

Units sold / yr: 15K–20K; avg 1,250–1,500/product
Revenue / yr: $287K–$383K; units × avg price
Conversion rate: 10.5%
Avg BSR: #100
Page quality: 0%
Prime: 100%
Sponsored: 91%
Out of stock: 4.5%
Avg brand age: 76 months
Avg seller age: 149 days

Competition: brands, sellers & click share

The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.

Brands

4 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

82%

Top 20: 100%

Open market

Emergen-C79%
KAPPA NUTRITION15%
Country Farms4%
Nature's Bounty2%

immune c demand & seasonality

Weekly Amazon search volume, last 100 weeks — -13.5% search growth over the last 90 days.

Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 2.8×

Open Trend

Top immune c search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

emergen c raspberry15K/yr -6.7%9.9% conv.
immunity powder10K/yr +24.2%0.6% conv.
emergen c raspberry flavor5K/yr +63.2%23.2% conv.
immune c14K/yr -35.1%9.1% conv.
immunity drink mix6K/yr +44.6%0.4% conv.
raspberry emergency c packets9K/yr -32.9%23.9% conv.
immune defense powder5K/yr +66.6%2.2% conv.
immunity supplement powder4K/yr +78.5%0.0% conv.
immune c plus7K/yr -34.4%18.3% conv.
immunity packets5K/yr -3.0%1.4% conv.

All search terms

Top immune c products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

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

Top sellers

by 90-day click share

Emergen-C Vitamin C 1000mg Immune Support Powder Raspberry 30 Packets

Emergen-C$12.034.8★19,561 rev

Emergen-C Immune+ Triple Action Immune Support Powder BetaVia (R) 1000mg Vitamin C B Vitamins Vitamin D and Antioxidants Raspberry Back to School Essentials 30 Count

Emergen-C$12.894.8★16,184 rev

Emergen-C Vitamin C 1000mg Immune Support Powder Raspberry 60 Packets

Emergen-C$25.604.8★7,590 rev

KAPPA NUTRITION Immune C Plus 14 in 1 Advanced Complex | 1 000 mg Non-Acidic Vitamin C + Quercetin + Vitamin D3 5 000 IU + Vitamin K2 MK-7 + Zinc Selenium & Copper | 120 Capsules

KAPPA NUTRITION$27.514.7★4,044 rev

Emergen-C Vitamin C 1000mg Immune Support Raspberry Lemonade 36 Packets

Emergen-C$23.934.7★1,027 rev

Newest

by launch date

Country Farms Immune Defense Superfoods Immune Support Supplement Vitamin C with Black Elderberry Echinacea Turmeric Supports Hydration with Probiotics and Prebiotics Berry Flavor 60 Servings

Country Farms$20.391,807 rev

1y ago

Emergen-C Vitamin C 1000mg Immune Support Raspberry Lemonade 36 Packets

Emergen-C$23.931,027 rev

2y ago

KAPPA NUTRITION Immune C Plus 14 in 1 Advanced Complex | 1 000 mg Non-Acidic Vitamin C + Quercetin + Vitamin D3 5 000 IU + Vitamin K2 MK-7 + Zinc Selenium & Copper | 120 Capsules

KAPPA NUTRITION$27.514,044 rev

2y ago

Natures Bounty Immune 24 Hour + The only Vitamin C with 24 Hour Immune Support from Ester-C 1000 mg Vitamin C D & Zinc Gluten Free Rapid Release Softgels 2 Softgels per Day 50 Count

Nature's Bounty$8.575,561 rev

4y ago

KAPPA NUTRITION Immune C Plus 14 in 1 Advanced Complex | 1 000 mg Non-Acidic Vitamin C + Quercetin + Vitamin D3 5 000 IU + Vitamin K2 MK-7 + Zinc Selenium & Copper | 60 Capsules

KAPPA NUTRITION$16.674,044 rev

5y ago

What reviews say buyers love and hate about immune c

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

What buyers love

Taste-Overall12%

“The taste is great- fresh”

Flavor10%

“the flavor strength is just right”

Vitamin10%

“contains a lot of good vitamins”

Quality-Overall9%

“Good product, Part of my Daily Regimen”

Immunity Booster9%

“Helps to boost my immune system”

Cold Relief8%

“helps me get through cold”

Value For Money4%

“worth the money”

Efficiency4%

“Works well”

Solubility3%

“It mixes well”

Ease Of Use3%

“It is super easy to make”

What buyers complain about

Taste-Overall10%

“Tastes terrible”

Size-Overall9%

“The gel caps are quite large”

Flavor5%

“I saw the berry flavor. not sold in stores by me”

Vitamin5%

“I hate taking vitamin c shots because they were always the nasty orange ones”

Side Effects4%

“Made me feel like I was going to throw up”

Value For Money3%

“I find this product a little expensive”

Quality-Overall3%

“Something is wrong with the quality control which makes me nervous about using any of the other packets in the box”

Hard Feel3%

“Product was hard as rock”

Advertised Vs Actual Product3%

“False advertising”

Moist/Dry3%

“It was humid”

Top return reasons

Acid Regulator/Stomach Ache Relief50%

Taste-Overall50%

Common immune c questions

Is immune c profitable to sell on Amazon United States?: The niche generates $220K/yr across 11 tracked products. 90-day search growth is -13.5%. Flapen's verdict: Skip it (41/100).
How competitive is the immune c niche?: 4 brands and 67 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in immune c?: Top complaints mined from reviews: Taste-Overall, Size-Overall, Flavor. The return rate is 0.0%.
When does demand for immune c peak?: Demand peaks in Apr–May–Jun–Jul; the busiest month runs 2.8× the quietest.
What does it cost to enter the immune c niche?: Listings span $8.57–$27.51; the average listing price is $19.14 (sweet spot $15–$100). The average incumbent carries 8,818 reviews — the moat a new listing must climb.