Is nattokinase powder profitable to sell on Amazon United States?

The niche generates $95K/yr across 7 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -14.9%. Flapen's verdict: Skip it (46/100).

How competitive is the nattokinase powder niche?

5 brands and 6 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in nattokinase powder?

Top complaints mined from reviews: Taste-Overall, Dosage, Advertised Vs Actual Product. The return rate is 0.0%.

What does it cost to enter the nattokinase powder niche?

Listings span $17.45–$54.74; the average listing price is $31.49 (sweet spot $15–$100). The average incumbent carries 213 reviews — the moat a new listing must climb.

Nattokinase Powder

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

Avg price

Incredible$31.49

avg listing price — sweet spot $15–$100

Price range

Incredible$17.45–$54.74

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

Review moat

Great213

avg incumbent reviews — the moat a new listing must climb

Conversion

Great7.7%

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

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Market size

Bad$95K

$95K/yr · 39K searches

Growth

Bad-14.9%

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

Competition

Bad93%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Signals Low Review Barrier

Is nattokinase powder profitable on Amazon?

According to Flapen's Amazon United States niche tracking, nattokinase powder is a $95K/yr Amazon United States market (39K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 46/100.

Data updated Jul 26, 2026 · scored weekly · How we score niches

nattokinase powder market size & sales

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

Units sold / yr: 3K–3K; avg 100–250/product
Revenue / yr: $79K–$94K; units × avg price
Conversion rate: 7.7%
Avg BSR: #1,090
Page quality: 0%
Prime: 100%
Sponsored: 86%
Out of stock: 5.6%
Avg brand age: 44 months
Avg seller age: 188 days

Competition: brands, sellers & click share

The top 5 products capture 93% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

93%

Top 20: 100%

Open market

Toku73%
BulkSupplements15%
YAMASAN KYOTO UJI5%
FARMER QUEEN3%
Micro Ingredients3%

Top nattokinase powder search terms shoppers use

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

toku flow nattokinase11K/yr +8.7%9.4% conv.
nattokinase powder16K/yr -6.6%2.8% conv.
toku flow4K/yr -13.4%9.1% conv.
nattokinase powder organic4K/yr -21.2%3.5% conv.
toku nattokinase4K/yr -70.0%5.3% conv.

All search terms

Top nattokinase powder 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 7 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Toku Nattokinase 10 800 FU Supplement with Vitamin K2 MK7 & Oat Beta Glucan Daily Circulation Support Powder Plant-Based Drink Mix Soy-Free 30 Single-Serve Packets - Unflavored

Toku$54.084.3★73 rev

Toku Nattokinase 10 800 FU Supplement with Vitamin K2 MK7 & Oat Beta Glucan Daily Circulation Support Powder Plant-Based Drink Mix Soy-Free 30 Single-Serve Packets - Chocolate

Toku$54.744.2★119 rev

BulkSupplements.com Nattokinase Powder - Natto Powder Nattokinase Supplement Nattokinase 4000 FU - Sourced from Natto Extract 100mg per Serving 25g (0.88 oz) (Pack of 1)

BulkSupplements$24.614.1★78 rev

BulkSupplements.com Nattokinase 2000 FU Powder - Sourced from Natto Extract Nattokinase Supplement - Gluten Free 100mg of Natto Powder per Serving 25g (0.88 oz) (Pack of 1)

BulkSupplements$17.454.0★250 rev

YAMASAN KYOTO UJI Japanese Natto Fermented Soybean Powder 1.76oz

YAMASAN KYOTO UJI$19.304.3★341 rev

Newest

by launch date

Toku Nattokinase 10 800 FU Supplement with Vitamin K2 MK7 & Oat Beta Glucan Daily Circulation Support Powder Plant-Based Drink Mix Soy-Free 30 Single-Serve Packets - Unflavored

Toku$54.0873 rev

9mo ago

Toku Nattokinase 10 800 FU Supplement with Vitamin K2 MK7 & Oat Beta Glucan Daily Circulation Support Powder Plant-Based Drink Mix Soy-Free 30 Single-Serve Packets - Chocolate

Toku$54.74119 rev

1y ago

Micro Ingredients Nattokinase 240 Softgels 200mg (4 000 FU) Per Serving | 7-in-1 Nattokinase Supplement with CoQ10 Bromelain Turmeric Ginger Olive Leaf & White Willow Bark | Non-GMO

Micro Ingredients$28.70517 rev

1y ago

YAMASAN KYOTO UJI Japanese Natto Fermented Soybean Powder 1.76oz

YAMASAN KYOTO UJI$19.30341 rev

2y ago

BulkSupplements.com Nattokinase Powder - Natto Powder Nattokinase Supplement Nattokinase 4000 FU - Sourced from Natto Extract 100mg per Serving 25g (0.88 oz) (Pack of 1)

BulkSupplements$24.6178 rev

2y ago

What reviews say buyers love and hate about nattokinase powder

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

What buyers love

Taste-Overall19%

“It tastes pretty good”

Quality-Overall11%

“Overall, I've been very happy with the product and will continue ordering the unflavored version”

Ease Of Use9%

“Easy to use”

Value For Money5%

“Worth it”

Heart Health4%

“Overall, its a strong, well-rounded option for cardiovascular support”

Ingredients-Overall3%

“I like micro ingredients”

Advertised Vs Actual Product3%

“AS DESCRIBED”

Blood Pressure3%

“Relieved high blood pressure”

Flavor3%

“Good flavor”

Ease Of Chewing/Swallowing2%

“Easy to swallow”

What buyers complain about

Taste-Overall13%

“Tastes like dirt”

Dosage8%

“The dosage is 100mg which is an incredibly tiny amount”

Advertised Vs Actual Product7%

“Rather misleading”

Value For Money6%

“I wish the prices were a little lower”

Side Effects6%

“the side effects makes me not want to take it”

Ingredients-Overall6%

“like all herbs it'll take awhile to see results”

Sweetness5%

“it is way too sweet”

Flavor4%

“Weird flavor”

Size-Overall4%

“These are little bigger than the usual size”

Artificial Sweeteners4%

“Contains artificial sweeteners”

Top return reasons

Size-Overall100%

Common nattokinase powder questions

Is nattokinase powder profitable to sell on Amazon United States?: The niche generates $95K/yr across 7 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -14.9%. Flapen's verdict: Skip it (46/100).
How competitive is the nattokinase powder niche?: 5 brands and 6 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in nattokinase powder?: Top complaints mined from reviews: Taste-Overall, Dosage, Advertised Vs Actual Product. The return rate is 0.0%.
What does it cost to enter the nattokinase powder niche?: Listings span $17.45–$54.74; the average listing price is $31.49 (sweet spot $15–$100). The average incumbent carries 213 reviews — the moat a new listing must climb.