Is niacin flush profitable to sell on Amazon United States?

The niche generates $53K/yr across 10 tracked products. 90-day search growth is -6.7%. Flapen's verdict: Skip it (41/100).

How competitive is the niacin flush niche?

7 brands and 49 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 94% of demand.

What do buyers complain about in niacin flush?

Top complaints mined from reviews: Allergies, Side Effects, Dosage. The return rate is 0.0%.

When does demand for niacin flush peak?

Demand is steady year-round — the busiest month runs 1.3× the quietest.

What does it cost to enter the niacin flush niche?

Listings span $7.72–$19.98; the average listing price is $14.38 (sweet spot $15–$100). The average incumbent carries 3,554 reviews — the moat a new listing must climb.

Niacin Flush

Skip it

A concentrated shelf (top 5 take 86% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Great9.2%

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

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Avg price

Good$14.38

avg listing price — sweet spot $15–$100

Price range

Okay$7.72–$19.98

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

Review moat

Okay3,553.7

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-6.7%

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

Brand share

Bad94%

top-5 brand share — brand-locked demand

Market size

Bad$53K

$53K/yr · 40K searches

Competition

Bad86%

top-5 click share — a locked-up shelf

Is niacin flush profitable on Amazon?

According to Flapen's Amazon United States niche tracking, niacin flush is a $53K/yr Amazon United States market (40K searches/yr). The top 5 brands hold 94% of demand. Verdict: Skip it — 41/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

niacin flush market size & sales

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

Units sold / yr: 3K–4K; avg 250–500/product
Revenue / yr: $43K–$58K; units × avg price
Conversion rate: 9.2%
Avg BSR: #464
Page quality: 0%
Prime: 100%
Sponsored: 70%
Out of stock: 9.1%
Avg brand age: 127 months
Avg seller age: 177 days

Competition: brands, sellers & click share

The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 flat

Sellers

Top-5 brand share

94%

Top 20: 100%

Top-5 click share

86%

Top 20: 100%

Open market

Nutricost58%
Dr. Berg Nutritionals13%
Horbäach10%
BulkSupplements7%
NOW Foods6%
Nature's Bounty3%
Open — no brand owns it (1 brand, 3%)

niacin flush demand & seasonality

Weekly Amazon search volume, last 102 weeks — -6.7% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top niacin flush search terms shoppers use

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

niacin flush20K/yr -8.6%5.9% conv.
niacin with flush6K/yr -13.8%9.3% conv.
flushing niacin5K/yr -6.9%11.4% conv.
flush niacin4K/yr +29.6%6.7% conv.
niacin flushing3K/yr -10.7%11.6% conv.
niacin with flushing2K/yr -10.3%10.8% conv.
niacin 500mg flush1K/yr -6.2%10.3% conv.

All search terms

Top niacin flush 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 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Nutricost Niacin (Vitamin B3) 500mg 240 Capsules with Flushing GMO-Free

Nutricost$14.884.2★9,951 rev

Nutricost Niacin (Vitamin B3) 100mg 240 Capsules with Flushing

Nutricost$11.944.5★2,737 rev

Dr. Berg Highly-Potent Niacin 500 mg Now Only 125 mg per Capsule for Niacin Flush Tolerance Building Gradually Increase to 500mg a Day Vitamin B3 for Heart Brain & Energy Support 100 Capsules

Dr. Berg Nutritionals$19.984.5★294 rev

Horbach Niacin | Vitamin B3 500mg | 100 Capsules | with Flushing

Horbäach$8.484.0★1,244 rev

BulkSupplements.com Niacin Powder - Vitamin B3 Supplement Niacin Flush - Gluten Free 500mg per Serving 250g (8.8 oz) (Pack of 1)

BulkSupplements$16.094.4★1,808 rev

Newest

by launch date

Dr. Berg Highly-Potent Niacin 500 mg Now Only 125 mg per Capsule for Niacin Flush Tolerance Building Gradually Increase to 500mg a Day Vitamin B3 for Heart Brain & Energy Support 100 Capsules

Dr. Berg Nutritionals$19.98294 rev

1y ago

BulkSupplements.com Niacin Capsules - Niacin Supplement Vitamin B3 - Gluten Free 1 Capsule per Serving 365 Capsules (Pack of 1)

BulkSupplements$18.54448 rev

3y ago

Nutricost Niacin (Vitamin B3) 100mg 240 Capsules with Flushing

Nutricost$11.942,737 rev

5y ago

Horbach Niacin | Vitamin B3 500mg | 100 Capsules | with Flushing

Horbäach$8.481,244 rev

7y ago

Nutricost Niacin (Vitamin B3) 500mg 240 Capsules with Flushing GMO-Free

Nutricost$14.889,951 rev

10y ago

What reviews say buyers love and hate about niacin flush

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

What buyers love

Quality-Overall26%

“Excellent product”

Advertised Vs Actual Product13%

“As advertised”

Value For Money7%

“Reasonable price”

Efficiency6%

“effective”

Vitamin5%

“Great choice for vitamins”

Heart Health4%

“Great supplement for controlling your cholesterol”

Ease Of Chewing/Swallowing3%

“The capsules are easy to take”

Side Effects2%

“had no reaction at all”

Nutritional Content2%

“I guess I'm getting the nutrient benefits of the Niacin but”

Dosage2%

“Dosage of 100mg is a good start”

What buyers complain about

Allergies32%

“Allergic Reaction”

Side Effects15%

“The side effects are horrible”

Dosage8%

“This dose is just too high for me”

Skin Health5%

“My skin burned”

Vitamin3%

“If youre new to supplementing niacin do not buy this”

Functionality-Overall3%

“Not work”

Quality-Overall2%

“Inferior Quality”

Heating2%

“Broke out in hives and got flush and very hot”

Itch Relief2%

“Well, for me, I break out into an itch really bad”

Value For Money2%

“A very costly mistake”

Top return reasons

Side Effects20%

Dosage20%

Functionality-Overall10%

Product Condition10%

Size-Overall10%

Value For Money10%

Vitamin10%

Calcium10%

Common niacin flush questions

Is niacin flush profitable to sell on Amazon United States?: The niche generates $53K/yr across 10 tracked products. 90-day search growth is -6.7%. Flapen's verdict: Skip it (41/100).
How competitive is the niacin flush niche?: 7 brands and 49 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 94% of demand.
What do buyers complain about in niacin flush?: Top complaints mined from reviews: Allergies, Side Effects, Dosage. The return rate is 0.0%.
When does demand for niacin flush peak?: Demand is steady year-round — the busiest month runs 1.3× the quietest.
What does it cost to enter the niacin flush niche?: Listings span $7.72–$19.98; the average listing price is $14.38 (sweet spot $15–$100). The average incumbent carries 3,554 reviews — the moat a new listing must climb.