Is vitamin k1 profitable to sell on Amazon United States?

The niche generates $132K/yr across 28 tracked products. 90-day search growth is -3.8%. Flapen's verdict: Worth a look (56/100).

How competitive is the vitamin k1 niche?

23 brands and 559 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 53% of demand.

When does demand for vitamin k1 peak?

Demand peaks in Jan–Oct–Nov–Dec; the busiest month runs 3.3× the quietest.

What does it cost to enter the vitamin k1 niche?

Listings span $4.58–$68.73; the average listing price is $21.55 (sweet spot $15–$100). The average incumbent carries 1,691 reviews — the moat a new listing must climb.

vitamin k1

Worth a look

Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 6% kills the launch gate

Avg price

Great$21.55

avg listing price — sweet spot $15–$100

Conversion

Great9.4%

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

Brand share

Great53%

top-5 brand share — no brand owns this niche

Price range

Great$4.58–$68.73

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

Competition

Good52%

top-5 click share — leaders hold, buyers still browse

Review moat

Okay1,691.07

avg incumbent reviews — the moat a new listing must climb

Market size

Okay$132K

$132K/yr · 65K searches

Growth

Bad-3.8%

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

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

According to Flapen's Amazon United States niche tracking, vitamin k1 is a $132K/yr Amazon United States market (65K searches/yr). The top 5 brands hold 53% of demand. Demand peaks in Jan–Oct–Nov–Dec. Verdict: Worth a look — 56/100.

Data updated Jul 17, 2026 · scored weekly · How we score niches

vitamin k1 market data

Units sold / yr: 6K–8K; avg 100–250/product
Revenue / yr: $129K–$172K; units × avg price
Launch success: —; 0 of 0 new (360d)
Conversion rate: 9.4%
Avg BSR: #328
Page quality: 0%
Prime: 100%
Sponsored: 79%
Out of stock: 3.6%
Avg brand age: 89 months
Avg seller age: 172 days

Competition & brand share

The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.

Brands

23 falling

Sellers

559

Top-5 brand share

53%

Top 20: 97%

Top-5 click share

52%

Top 20: 93%

Open market

40%

BlueBonnet12%
Vet One12%
BioTechUSA11%
Superior Source8%
Puritan's Pride8%
Bronson8%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -3.8% search growth over the last 90 days.

Peak months: Jan, Oct, Nov, Dec · busiest ÷ quietest = 3.3×

Open Trend

Top vitamin k1 search terms

vitamin k137K/yr +1.4%9.8% conv.
vitamin k1 for dogs9K/yr -14.1%12.8% conv.
vitamin k for dogs5K/yr -12.8%9.9% conv.
k 15K/yr -6.4%0.5% conv.
k1 vitamin3K/yr +70.2%9.7% conv.
k-12K/yr -12.4%2.8% conv.
k1 vitamin supplement4K/yr -52.1%7.1% conv.

All search terms

Top vitamin k1 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 28 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Bluebonnet Vitamin K1 100 mcg Supports Bone Health - Phylloquinone Crystalline Vitamin K Supplement - Non-GMO Kosher Certified Gluten-Free Dairy-Free - 100 Vegan Caplets

BlueBonnet$10.584.6★462 rev

Vet One Vitamin K1 Chewable Tablets - Vitamin K1 for Dogs Beef-Flavored Chewable Vitamins for Cats and Dogs (50 Tablets Phytonadione 25mg)

Vet One$20.844.6★464 rev

Bio-Tech - K1-1000 (Vitamin K-1) 100 Capsules

BioTechUSA$19.884.8★226 rev

Puritans Pride Premium Vitamin K 100mcg Dietary Supplement for Bone Joint and Blood Clotting Health Support 100 Day Supply 100 Tablets

Puritan's Pride$4.584.6★6,132 rev

Vitamin K1 Chewable Tablets 25mg 50ct

V.E.T. PHARMACEUTICALS$19.054.6★237 rev

Newest

by launch date

Dr. Green Mom Natal K Oral Vitamin K1 Drops for Newborns | Organic Phytonadione in MCT Oil | Natural VIT K for Babies to Support Blood Clotting

Dr. Green Mom$38.88174 rev

1y ago

Vitalibre Vitamin K Complex 2600 mcg K1 & K2 (MK-7 & MK-4) with Vitamin A & D3 5000 IU Bioavailable Full Spectrum for Bone Strength and Heart Health 90 Softgels

Vitalibre$15.5232 rev

1y ago

Sports Research Vitamin K Multi-Spectrum - Three Types of Vitamin K: K1 K2 MK-4 & K2 MK-7 - Vegan Friendly Plantgel Capsule - 60 softgels

Sports Research$25.6969 rev

2y ago

Super Vitamin K Complex (K2 MK7 + MK4 & K1) 360 Coconut Oil Softgles | Easily Absorbed K Vitamins Active Menaquinone Complex | Non-GMO

Micro Ingredients$24.38439 rev

3y ago

NatureBell Vitamin K Complex - 300 Softgels - Delivers 2 600mcg Vitamin K - Full Spectrum Bone & Heart Health Support Supplement - High Absorption K1 & K2 MK-4 & MK-7*

NatureBell$24.021,316 rev