Is cancer supplements profitable to sell on Amazon United States?

The niche generates $92K/yr across 5 tracked products. 90-day search growth is +6.5%. Flapen's verdict: Skip it (39/100).

How competitive is the cancer supplements niche?

4 brands and 7 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in cancer supplements?

Top complaints mined from reviews: Functionality-Overall, Dosage, Allergies. The return rate is 0.0%.

What does it cost to enter the cancer supplements niche?

Listings span $12.62–$38.98; the average listing price is $23.41 (sweet spot $15–$100). The average incumbent carries 8,599 reviews — the moat a new listing must climb.

cancer supplements

Skip it

A 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

Incredible$23.41

avg listing price — sweet spot $15–$100

Price range

Great$12.62–$38.98

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

Conversion

Great8.0%

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

Growth

Okay+6.5%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Market size

Bad$92K

$92K/yr · 49K searches

Review moat

Bad8,598.8

avg incumbent reviews — the moat a new listing must climb

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, cancer supplements is a $92K/yr Amazon United States market (49K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 39/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

cancer supplements market data

Units sold / yr: 3K–4K; avg 100–250/product
Revenue / yr: $70K–$94K; units × avg price
Conversion rate: 8.0%
Avg BSR: #406
Page quality: 0%
Prime: 100%
Sponsored: 40%
Out of stock: 0.4%
Avg brand age: 88 months
Avg seller age: 155 days

Competition & brand share

The top 5 products capture 100% 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

100%

Top 20: 100%

Open market

MEDCHOICE84%
Carlyle6%
Clean Nutraceuticals5%
Horbäach5%
Open — no brand owns it (0%)

Demand

Weekly Amazon search volume, last 51 weeks — +6.5% search growth over the last 90 days.

Open Trend

Top cancer supplements search terms

medchoice turmeric bioperine garlic ginger8K/yr +197.4%9.9% conv.
cancer supplements13K/yr -6.4%0.9% conv.
anti cancer supplement6K/yr -17.5%1.4% conv.
kill cancer supplement4K/yr -9.4%0.2% conv.
cancer fighting supplement5K/yr -40.4%0.6% conv.
turmeric garlic ginger supplement3K/yr -19.2%10.1% conv.
cancer prevention supplements2K/yr -31.5%0.5% conv.
cancer killer supplements7K/yr -60.9%0.4% conv.
turmeric bioperine garlic ginger 2360mg2K/yr -38.0%19.6% conv.

All search terms

Top cancer supplements 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 5 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

4-in-1 Turmeric Joint Support Supplements with Garlic and BioPerine - 2360 mg High Potency Herbal Blend for Mobility Everyday Flexibility Digestive Comfort and Active Aging Support (120ct)

MEDCHOICE$23.604.6★18,225 rev

4-in-1 Turmeric Joint Support Supplements with Garlic and BioPerine - 2360 mg High Potency Herbal Blend for Mobility Everyday Flexibility Digestive Comfort Active Aging Support (120ct Pack of 2)

MEDCHOICE$38.984.6★18,225 rev

Carlyle Soursop Leaves | 160 Capsules | Traditional Herb

Carlyle$13.914.6★1,451 rev

Clean Nutra Soursop Supplement Moringa Sea Moss Black Seed Oil Berberine Turmeric Resveratrol Quercetin Greens Bitters Boswellia Bitter Melon Burdock Root Antioxidant Support 90 Capsules

Clean Nutraceuticals$27.954.6★1,072 rev

Horbach Graviola Capsules | 120 Count | Soursop (Annona Muricata)

Horbäach$12.624.6★4,021 rev

Newest

by launch date

Clean Nutra Soursop Supplement Moringa Sea Moss Black Seed Oil Berberine Turmeric Resveratrol Quercetin Greens Bitters Boswellia Bitter Melon Burdock Root Antioxidant Support 90 Capsules

Clean Nutraceuticals$27.951,072 rev

1y ago

Carlyle Soursop Leaves | 160 Capsules | Traditional Herb

Carlyle$13.911,451 rev

2y ago

4-in-1 Turmeric Joint Support Supplements with Garlic and BioPerine - 2360 mg High Potency Herbal Blend for Mobility Everyday Flexibility Digestive Comfort Active Aging Support (120ct Pack of 2)

MEDCHOICE$38.9818,225 rev

5y ago

4-in-1 Turmeric Joint Support Supplements with Garlic and BioPerine - 2360 mg High Potency Herbal Blend for Mobility Everyday Flexibility Digestive Comfort and Active Aging Support (120ct)

MEDCHOICE$23.6018,225 rev

6y ago

Horbach Graviola Capsules | 120 Count | Soursop (Annona Muricata)

Horbäach$12.624,021 rev

7y ago

What buyers say about cancer supplements

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

What buyers love

Quality-Overall22%

“This is the highest-quality fish oil Ive used”

Joint Pain9%

“Good for joint pain”

Inflammation8%

“Great for inflammation”

Vitamin6%

“Quality vitamin at an affordable price”

Advertised Vs Actual Product5%

“As advertised”

Value For Money4%

“Great deal”

Ingredients-Overall4%

“Pure Ingredients”

Ease Of Chewing/Swallowing4%

“Easy to swallow”

Immunity Booster3%

“Great supplement that helps boost immune system”

Nutritional Content3%

“Overall, health benefits”

What buyers complain about

Functionality-Overall13%

“Doesn't work”

Dosage8%

“Concerned about the dosage”

Allergies6%

“Was Allergic to it”

Acid Regulator/Stomach Ache Relief6%

“and Bloating”

Value For Money6%

“Price is too high”

Side Effects5%

“Painful side effects”

Size-Overall4%

“The capsules are a little large”

Ingredients-Overall4%

“Contains toxic ingredients”

Vitamin3%

“Another garbage supplement from Amazon I did not notice any benefit”

Joint Pain2%

“Didnt work for my rheumatoid arthritis swelling or pain”

Top return reasons

Value For Money75%

Quality-Overall13%

Dosage13%

Common questions

Is cancer supplements profitable to sell on Amazon United States?: The niche generates $92K/yr across 5 tracked products. 90-day search growth is +6.5%. Flapen's verdict: Skip it (39/100).
How competitive is the cancer supplements niche?: 4 brands and 7 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in cancer supplements?: Top complaints mined from reviews: Functionality-Overall, Dosage, Allergies. The return rate is 0.0%.
What does it cost to enter the cancer supplements niche?: Listings span $12.62–$38.98; the average listing price is $23.41 (sweet spot $15–$100). The average incumbent carries 8,599 reviews — the moat a new listing must climb.