Vitamins

Vitamin K (K1 & K2)

K1 comes from green vegetables, K2 from fermented foods. Your body needs it for blood clotting and bones. Ask a doctor first if you take blood thinners.

113 products from US online stores, sorted by what 100 µg of vitamin K costs – not by the price per pack.

0.96¢Lowest cost
per 100 µg vitamin K

Prices checked Nov 1, 2026, US
No paid placements

What does 100 µg mean?

vitamin K per serving in most of the products we checked: 45–3,800 µgvitamin K per serving in most of the products we checked

100 µg is about one serving: half of the 113 products we checked have up to 100 µg per serving, the other half more.
100 µg is within the 90–120 µg a day that’s considered adequate for adults (NIH (opens in a new tab)).

We compare by 100 µg only so products line up – it’s not a recommendation. Not medical advice.

Where products miss quality points

How the 113 products score

Very good 90+: 4
Good 75+: 109
Fair 60+: 0
Low under 60: 0

have no seal from an independent testing program: 95%have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 14 whose label says “third-party tested”

The full 30 testing points need an independent test. Every supplement sold in the US is made under the FDA’s GMP rules – the maker checks its own products, which gives 10 points. A seal from a testing program like NSF, USP or Informed Choice means a lab outside the company checks that what’s inside matches the label. Most brands don’t take part. That doesn’t make a product bad – without a seal, a clean product still gets up to 80.

We find seals on the label and in NSF’s public lists. USP and Informed Choice don’t let us search their lists automatically, so a seal that’s only in their lists can be missing. How the score works

Pack size

Compare packs of a similar size.

All sizesmixed98 productsSmallup to 60 days38 productsfrom $0.17Medium60–160 days36 productsfrom 4.9¢Large160+ days24 productsfrom 0.96¢

All sizes in one list can affect the results – big packs usually cost less per 100 µg. Pick a size above to compare packs that are alike.

Cost per 100 µgQualityPack price

98 of 113 products · cheapest per 100 µg vitamin K first

15 products are hidden

They have 1,000 µg vitamin K or more in one serving – at least 10 times the 100 µg we compare. There’s no official upper limit, so we only mark them.

Rank 1
Source Naturals
Vitamin K, 500 mcg
K1 · Tablets
75Good qualityCountry not stated
0.96¢
per 100 µg
Lowest
Pack
$9.57200 tablets
Vitamin K per serving
500 µgin 1 tablet
Pack lasts
200 daysat 1 tablet (500 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 2
Source Naturals
Vitamin K
K1 · Tablets
75Good qualityCountry not stated
1¢
per 100 µg
9% more
Pack
$5.20100 tablets
Vitamin K per serving
500 µgin 1 tablet
Pack lasts
100 daysat 1 tablet (500 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 3
NatureWise
Vegan Vitamin K2 Softgels
K2 · Softgels
75Good qualityCountry not stated
2.8¢
per 100 µg
190% more
Pack
$14.9990 softgels
Vitamin K per serving
600 µgin 1 softgel
Pack lasts
90 daysat 1 softgel (600 µg) a day
naturewise.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 4
Micro Ingredients
Vitamin K2, MK-7, 200 mcg
K2 (MK-7) · Softgels
85Good qualityCountry not stated
4¢
per 100 µg
317% more
Pack
$23.95300 softgels
Vitamin K per serving
200 µgin 1 softgel
Pack lasts
300 daysat 1 softgel (200 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 5
Micro Ingredients
Vitamin K2 MK-7 Supplement 300 Coconut Oil Softgles
K2 (MK-7) · Softgels
85Good qualityCountry not stated
4.2¢
per 100 µg
339% more
Pack
$25.21300 softgels
Vitamin K per serving
200 µgin 1 softgel
Pack lasts
300 daysat 1 softgel (200 µg) a day
microingredients.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 6
Futurebiotics
Vitamin K Triple Play
K1 · Capsules
75Good qualityMade in USA
4.7¢
per 100 µg
387% more
Pack
$15.3760 capsules
Vitamin K per serving
550 µgin 1 capsule
Pack lasts
60 daysat 1 capsule (550 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 7
Mason Natural
Vitamin K, 100 mcg
K1 · Tablets
75Good qualityCountry not stated
4.9¢
per 100 µg
408% more
Pack
$4.86100 tablets
Vitamin K per serving
100 µgin 1 tablet
Pack lasts
100 daysat 1 tablet (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 8
Country Life
Vegan K2 Complex
K2 (MK-7) · Tablets
80Good qualityMade in USA
5.7¢
per 100 µg
500% more
Pack
$17.2460 tablets
Vitamin K per serving
500 µgin 1 tablet
Pack lasts
60 daysat 1 tablet (500 µg) a day
countrylifevitamins.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 9
NutraLife
MK7 Vitamin K2, 100 mcg
K2 (MK-7) · Tablets
80Good qualityCountry not stated
5.8¢
per 100 µg
501% more
Pack
$20.99365 tablets
Vitamin K per serving
100 µgin 1 tablet
Pack lasts
365 daysat 1 tablet (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 10
KAL
Vitamin K, 100 mcg
K1 · Tablets
75Good qualityCountry not stated
6¢
per 100 µg
523% more
Pack
$5.96100 tablets
Vitamin K per serving
100 µgin 1 tablet
Pack lasts
100 daysat 1 tablet (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 11
Nutricost
Vitamin K2 MK-4, 100 mcg
K2 (MK-4) · Capsules
80Good qualityMade in USA
6.4¢
per 100 µg
570% more
Pack
$15.40240 capsules
Vitamin K per serving
100 µgin 1 capsule
Pack lasts
240 daysat 1 capsule (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 12
Superior Source
Vitamin K-2, 500 mcg
K2 · Tablets
75Good qualityCountry not stated
6.9¢
per 100 µg
621% more
Pack
$20.7060 tablets
Vitamin K per serving
500 µgin 1 tablet
Pack lasts
60 daysat 1 tablet (500 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 13
Mason Natural
Vitamin K2
K2 · Tablets
75Good qualityMade in USA
7¢
per 100 µg
632% more
Pack
$7.01100 tablets
Vitamin K per serving
100 µgin 1 tablet
Pack lasts
100 daysat 1 tablet (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 14
Nutricost
Vitamin K2 (MK4) Capsules
K2 (MK-4) · Capsules
80Good qualityMade in USA
7.1¢
per 100 µg
639% more
Pack
$16.97240 capsules
Vitamin K per serving
100 µgin 1 capsule
Pack lasts
240 daysat 1 capsule (100 µg) a day
nutricost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 15
Nature's Life
Revitalizing Vitamin K-2, Natural, 500 mcg
K2 (MK-7) · Liquid
80Good qualityCountry not stated
7.2¢
per 100 µg
649% more
Pack
$21.1959.1 ml (2 fl oz)59 servings
Vitamin K per serving
500 µgin 1 ml
Pack lasts
295 daysat 100 µg a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 16
Solaray
Vitamin K, 100 mcg
K1 · Tablets
75Good qualityCountry not stated
7.3¢
per 100 µg
662% more
Pack
$7.29100 tablets
Vitamin K per serving
100 µgin 1 tablet
Pack lasts
100 daysat 1 tablet (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 17
Nutricost
Vitamin K2 MK-7, 100 mcg
K2 (MK-7) · Softgels
85Good qualityPacked in USA
7.5¢
per 100 µg
682% more
Pack
$17.95240 softgels
Vitamin K per serving
100 µgin 1 softgel
Pack lasts
240 daysat 1 softgel (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 18
California Gold Nutrition
Vitamin K Complex
K1 · Capsules
75Good qualityCountry not stated
7.5¢
per 100 µg
688% more
Pack
$9.9660 capsules
Vitamin K per serving
220 µgin 1 capsule
Pack lasts
60 daysat 1 capsule (220 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 19
NOW Foods
MK-7, Vitamin K-2, 300 mcg
K2 (MK-7) · Capsules
80Good qualityMade in USA
8.2¢
per 100 µg
753% more
Pack
$29.38120 capsules
Vitamin K per serving
300 µgin 1 capsule
Pack lasts
120 daysat 1 capsule (300 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 20
Nutricost
Vitamin K2 MK
K2 (MK-7) · Capsules
85Good qualityCountry not stated
8.3¢
per 100 µg
769% more
Pack
$19.97240 capsules
Vitamin K per serving
100 µgin 1 capsule
Pack lasts
240 daysat 1 capsule (100 µg) a day
nutricost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 21
Divine Health
Don Colbert M.D. Super K2
K2 (MK-7) · Capsules
80Good qualityCountry not stated
9¢
per 100 µg
846% more
Pack
$21.72120 capsules
Vitamin K per serving
200 µgin 1 capsule
Pack lasts
120 daysat 1 capsule (200 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 22
Futurebiotics
Vitamin K2 as MK-7 100 mcg
K2 (MK-7) · Capsules
80Good qualityMade in USA
$0.10
per 100 µg
942% more
Pack
$9.97100 capsules
Vitamin K per serving
100 µgin 1 capsule
Pack lasts
100 daysat 1 capsule (100 µg) a day
futurebiotics.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 23
NOW Foods
MK-7 Vitamin K-2, 300 mcg
K2 (MK-7) · Capsules
80Good qualityMade in USA
$0.10
per 100 µg
994% more
Pack
$18.8560 capsules
Vitamin K per serving
300 µgin 1 capsule
Pack lasts
60 daysat 1 capsule (300 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 24
Swanson Vitamins
Vitamin K1
K1 · Tablets
75Good qualityCountry not stated
$0.11
per 100 µg
1,048% more
Pack
$10.99100 tablets
Vitamin K per serving
100 µgin 1 tablet
Pack lasts
100 daysat 1 tablet (100 µg) a day
swansonvitamins.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 25
Swanson Vitamins
Vitamin K1, 100 mcg
K1 · Tablets
75Good qualityCountry not stated
$0.12
per 100 µg
1,106% more
Pack
$11.54100 tablets
Vitamin K per serving
100 µgin 1 tablet
Pack lasts
100 daysat 1 tablet (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 26
Nutricost
Vitamin K2 MK-7, 100 mcg
K2 (MK-7) · Softgels
85Good qualityCountry not stated
$0.12
per 100 µg
1,115% more
Pack
$13.95120 softgels
Vitamin K per serving
100 µgin 1 softgel
Pack lasts
120 daysat 1 softgel (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 27
The Vitamin Shoppe
Triple Strength Vitamin K2, 300 mcg
K2 (MK-7) · Capsules
80Good qualityCountry not stated
$0.12
per 100 µg
1,177% more
Pack
$21.9960 capsules
Vitamin K per serving
300 µgin 1 capsule
Pack lasts
60 daysat 1 capsule (300 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 28
Bluebonnet Nutrition
Vitamin K1 100 mcg
K1 · Tablets
75Good qualityMade in USA
$0.13
per 100 µg
1,253% more
Pack
$12.95100 tablets
Vitamin K per serving
100 µgin 1 tablet
Pack lasts
100 daysat 1 tablet (100 µg) a day
bluebonnetnutrition.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 29
Nutricost
Vitamin K2 MK
K2 (MK-7) · Softgels
80Good qualityCountry not stated
$0.13
per 100 µg
1,291% more
Pack
$15.97120 softgels
Vitamin K per serving
100 µgin 1 softgel
Pack lasts
120 daysat 1 softgel (100 µg) a day
nutricost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 30
MegaFood
Vitamin K1 & K2 Capsules
K1 · Capsules
75Good qualityCountry not stated
$0.14
per 100 µg
1,351% more
Pack
$22.4960 capsules
Vitamin K per serving
270 µgin 1 capsule
Pack lasts
60 daysat 1 capsule (270 µg) a day
megafood.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 31
21st Century
Vitamin K2 100 mcg
K2 (MK-7) · Capsules
80Good qualityCountry not stated
$0.15
per 100 µg
1,419% more
Pack
$15.99110 capsules
Vitamin K per serving
100 µgin 1 capsule
Pack lasts
110 daysat 1 capsule (100 µg) a day
21stcenturyvitamins.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 32
21st Century
Vitamin K2, 100 mcg
K2 (MK-7) · Capsules
80Good qualityCountry not stated
$0.15
per 100 µg
1,465% more
Pack
$16.47110 capsules
Vitamin K per serving
100 µgin 1 capsule
Pack lasts
110 daysat 1 capsule (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 33
Futurebiotics
Vitamin K2 as MK-7, 100 mcg
K2 (MK-7) · Capsules
80Good qualityCountry not stated
$0.15
per 100 µg
1,466% more
Pack
$14.99100 capsules
Vitamin K per serving
100 µgin 1 capsule
Pack lasts
100 daysat 1 capsule (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 34
Healthy Origins
Natural Vitamin K2 as MK-7, 100 mcg
K2 (MK-7) · Softgels
80Good qualityCountry not stated
$0.16
per 100 µg
1,525% more
Pack
$27.99180 softgels
Vitamin K per serving
100 µgin 1 softgel
Pack lasts
180 daysat 1 softgel (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 35
Healthy Origins
Vitamin K2 as MK-7
K2 (MK-7) · Softgels
80Good qualityCountry not stated
$0.16
per 100 µg
1,525% more
Pack
$27.99180 softgels
Vitamin K per serving
100 µgin 1 softgel
Pack lasts
180 daysat 1 softgel (100 µg) a day
healthyorigins.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 36
NOW Foods
MK-7 Vitamin K-2, 100 mcg
K2 (MK-7) · Capsules
80Good qualityMade in USA
$0.17
per 100 µg
1,663% more
Pack
$20.25120 capsules
Vitamin K per serving
100 µgin 1 capsule
Pack lasts
120 daysat 1 capsule (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 37
Force Factor
MK-7 Vitamin K2, 100 mcg
K2 (MK-7) · Capsules
80Good qualityMade in USA
$0.17
per 100 µg
1,692% more
Pack
$10.2960 capsules
Vitamin K per serving
100 µgin 1 capsule
Pack lasts
60 daysat 1 capsule (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 38
Sports Research
Vitamin K2, 180 mcg
K2 (MK-7) · Softgels
85Good qualityCountry not stated
$0.18
per 100 µg
1,735% more
Pack
$18.9760 softgels
Vitamin K per serving
180 µgin 1 softgel
Pack lasts
60 daysat 1 softgel (180 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 39
NatureWise
Vegan Vitamin K2 as MK-7
K2 (MK-7) · Softgels
85Good qualityCountry not stated
$0.18
per 100 µg
1,815% more
Pack
$21.99120 softgels
Vitamin K per serving
100 µgin 1 softgel
Pack lasts
120 daysat 1 softgel (100 µg) a day
naturewise.com (opens in a new tab)
Checked Nov 1, 2026 · Label
Rank 40
California Gold Nutrition
Vitamin K2 (as Menaquinone-7), 50 mcg
K2 (MK-7) · Softgels
78Good qualityCountry not stated
$0.20
per 100 µg
2,018% more
Pack
$12.16120 softgels
Vitamin K per serving
50 µgin 1 softgel
Pack lasts
60 daysat 2 softgels (100 µg) a day
vitacost.com (opens in a new tab)
Checked Nov 1, 2026 · Label

40 of 98 shown

Good to know

Fact: 8,322%more per 100 µg for the most expensive product than for the cheapest.
Fact: 570%more per 100 µg for the cheapest k2 (mk-4) than for the cheapest k1.

How we checked: one-time price for each size in the store’s US online shop, before sales tax and shipping, without subscriptions or coupons. Prices change often, so check the store before you buy. More on how we check

The amount we compare by only makes products comparable – it is not a dosage recommendation. Not medical advice.

How we calculate

Cost per dose = price ÷ (servings × amount per serving) × comparison amount. Example: $119.99 for 74 servings with 24 g of protein each is 1,776 g of protein. $119.99 ÷ 1,776 g × 30 g = $2.03 per 30 g of protein.

Found a mistake or a product we should add? Email us

Vitamin K (K1 & K2)

What does 100 µg mean?

Where products miss quality points

Pack size

Vitamin K, 500 mcg

Vitamin K

Vegan Vitamin K2 Softgels

Vitamin K2, MK-7, 200 mcg

Vitamin K2 MK-7 Supplement 300 Coconut Oil Softgles

Vitamin K Triple Play

Vitamin K, 100 mcg

Vegan K2 Complex

MK7 Vitamin K2, 100 mcg

Vitamin K, 100 mcg

Vitamin K2 MK-4, 100 mcg

Vitamin K-2, 500 mcg

Vitamin K2

Vitamin K2 (MK4) Capsules

Revitalizing Vitamin K-2, Natural, 500 mcg

Vitamin K, 100 mcg

Vitamin K2 MK-7, 100 mcg

Vitamin K Complex

MK-7, Vitamin K-2, 300 mcg

Vitamin K2 MK

Don Colbert M.D. Super K2

Vitamin K2 as MK-7 100 mcg

MK-7 Vitamin K-2, 300 mcg

Vitamin K1

Vitamin K1, 100 mcg

Vitamin K2 MK-7, 100 mcg

Triple Strength Vitamin K2, 300 mcg

Vitamin K1 100 mcg

Vitamin K2 MK

Vitamin K1 & K2 Capsules

Vitamin K2 100 mcg

Vitamin K2, 100 mcg

Vitamin K2 as MK-7, 100 mcg

Natural Vitamin K2 as MK-7, 100 mcg

Vitamin K2 as MK-7

MK-7 Vitamin K-2, 100 mcg

MK-7 Vitamin K2, 100 mcg

Vitamin K2, 180 mcg

Vegan Vitamin K2 as MK-7

Vitamin K2 (as Menaquinone-7), 50 mcg

Good to know