Vitamins
Vitamin D3 + K2
Vitamin D3 and K2 in one product. Vitamin D helps your body take up calcium, vitamin K2 helps build it into bone.
187 products from US online stores, sorted by what 25 µg of vitamin D3 costs – not by the price per pack.
4.5¢Lowest cost
per 25 µg vitamin D3
- Prices checked Nov 1, 2026, US
- No paid placements
What does 25 µg mean?
- vitamin D3 per serving in most of the products we checked
- 25–125 µgvitamin D3 per serving in most of the products we checked
- 25 µg is a fixed amount to compare by: half of the 187 products we checked have up to 125 µg per serving, the other half more.
- 25 µg is more than the 15–20 µg of vitamin D recommended a day for adults (NIH (opens in a new tab)).
We compare by 25 µg only so products line up – it’s not a recommendation. Not medical advice.
Where products miss quality points
How the 187 products score
- Very good 90+: 5
- Good 75+: 179
- Fair 60+: 3
- Low under 60: 0
- have no seal from an independent testing program
- 97%have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 16 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 sizes in one list can affect the results – big packs usually cost less per 25 µg. Pick a size above to compare packs that are alike.
64 of 187 products · cheapest per 25 µg vitamin D3 (1,000 IU) first
123 products are hidden
They have more than 100 µg vitamin D3 in one serving – more than the official upper limit a day for adults.
- Rank 1
NOW Foods
Liquid D3 & MK-7, Natural Mint
Liquid
80Good qualityMade in USA4.5¢per 25 µg
Lowest
- Pack
- $18.3629.6 ml (1 fl oz)164 servings
- Vitamin D3 per serving
- 62.5 µgin 0.18 ml
- Pack lasts
- 411 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 2
Zahler
Vitamin D3 & K2
Liquid
80Good qualityMade in USA5.4¢per 25 µg
20% more
- Pack
- $22.7229.6 ml (1 fl oz)423 servings
- Vitamin D3 per serving
- 25 µgin 0.07 ml
- Pack lasts
- 422 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 3
Thorne
Vitamin D + K2
Liquid
100Very good qualityMade in USA5.7¢per 25 µg
27% more
- Pack
- $34.00600 servings
- Vitamin D3 per serving
- 25 µg
- Pack lasts
- 600 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 4
Thorne
Vitamin D + K2 Liquid
Liquid
100Very good qualityMade in USA5.7¢per 25 µg
27% more
- Pack
- $34.00600 servings
- Vitamin D3 per serving
- 25 µg
- Pack lasts
- 600 daysif you take 25 µg a day
thorne.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 5
Futurebiotics
Vitamin K2 + D3 Minis
Tablets
80Good qualityCountry not stated5.8¢per 25 µg
30% more
- Pack
- $10.49180 tablets
- Vitamin D3 per serving
- 25 µgin 1 tablet
- Pack lasts
- 180 daysif you take 1 tablet (25 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 6
Zahler
Vitamin D3 & K2 Liquid
Liquid
80Good qualityMade in USA5.9¢per 25 µg
31% more
- Pack
- $26.21447 servings
- Vitamin D3 per serving
- 25 µg
- Pack lasts
- 447 daysif you take 25 µg a day
zahlers.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 7
California Gold Nutrition
Vitamin D3 + K2
Capsules
80Good qualityCountry not stated6¢per 25 µg
34% more
- Pack
- $14.39240 capsules
- Vitamin D3 per serving
- 25 µgin 1 capsule
- Pack lasts
- 240 daysif you take 1 capsule (25 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 8
Seeking Health
Vitamin D3 + K2 Drops
Liquid
85Good qualityMade in USA6.6¢per 25 µg
49% more
- Pack
- $29.87900 servings
- Vitamin D3 per serving
- 12.5 µg
- Pack lasts
- 450 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 9
Force Factor
Vitamin D3 & K2
Capsules
80Good qualityMade in USA6.7¢per 25 µg
51% more
- Pack
- $8.09120 capsules
- Vitamin D3 per serving
- 25 µgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (25 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 10
Mason Natural
Vitamin K2 + D3
Tablets
80Good qualityMade in USA6.9¢per 25 µg
56% more
- Pack
- $6.95100 tablets
- Vitamin D3 per serving
- 25 µgin 1 tablet
- Pack lasts
- 100 daysif you take 1 tablet (25 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 11
Nature's Answer
Vitamin D3 & K2 - Capsules
Capsules
78Good qualityCountry not stated7.1¢per 25 µg
59% more
- Pack
- $16.9960 capsules
- Vitamin D3 per serving
- 100 µgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (100 µg) a day
naturesanswer.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 12
NOW Foods
Vitamin D3 & K2
Capsules
80Good qualityMade in USA7.3¢per 25 µg
63% more
- Pack
- $17.51240 capsules
- Vitamin D3 per serving
- 25 µgin 1 capsule
- Pack lasts
- 240 daysif you take 1 capsule (25 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 13
Pure Encapsulations
Vitamin D3 & K2
Capsules
80Good qualityMade in USA7.4¢per 25 µg
66% more
- Pack
- $35.50120 capsules
- Vitamin D3 per serving
- 100 µgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (100 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 14
NOW Foods
Vitamin D3 & K2
Capsules
80Good qualityMade in USA7.4¢per 25 µg
66% more
- Pack
- $8.92120 capsules
- Vitamin D3 per serving
- 25 µgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (25 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 15
NaturesPlus
Vitamins D3 & K2
Tablets
80Good qualityCountry not stated7.4¢per 25 µg
67% more
- Pack
- $16.7590 tablets
- Vitamin D3 per serving
- 62.5 µgin 1 tablet
- Pack lasts
- 90 daysif you take 1 tablet (62.5 µg) a day
naturesplus.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 16
Carlson
Super Daily D3 + K2, 50 mcg (2,000 IU) & 45 mcg
Liquid
80Good qualityCountry not stated7.6¢per 25 µg
69% more
- Pack
- $25.4210.1 ml (0.3 fl oz)168 servings
- Vitamin D3 per serving
- 50 µgin 0.06 ml
- Pack lasts
- 168 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 17
Nature's Answer
Vitamin D3 & K2
Liquid
80Good qualityMade in USA7.6¢per 25 µg
70% more
- Pack
- $18.7414.8 ml (0.5 fl oz)247 servings
- Vitamin D3 per serving
- 25 µgin 0.06 ml
- Pack lasts
- 246 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 18
Carlson
Kid's Super Daily D3 + K2
Liquid
80Good qualityCountry not stated8.1¢per 25 µg
82% more
- Pack
- $27.4210.1 ml (0.3 fl oz)337 servings
- Vitamin D3 per serving
- 25 µgin 0.03 ml
- Pack lasts
- 336 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 19
Protocol for Life Balance
Liquid D3 & MK-7
Liquid
80Good qualityCountry not stated8.2¢per 25 µg
83% more
- Pack
- $33.6029.6 ml (1 fl oz)164 servings
- Vitamin D3 per serving
- 62.5 µgin 0.18 ml
- Pack lasts
- 411 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 20
California Gold Nutrition
Vitamin D3 + K2 as MK4, 25 mcg (1,000 IU)
Liquid
80Good qualityCountry not stated8.2¢per 25 µg
84% more
- Pack
- $24.3129.6 ml (1 fl oz)296 servings
- Vitamin D3 per serving
- 25 µgin 0.1 ml
- Pack lasts
- 296 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 21
Carlson
Super Daily D3 + K2 2,000 IU (50 mcg) & 45 mcg
Liquid
80Good qualityCountry not stated8.3¢per 25 µg
86% more
- Pack
- $29.90180 servings
- Vitamin D3 per serving
- 50 µg
- Pack lasts
- 360 daysif you take 25 µg a day
carlsonlabs.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 22
Micro Ingredients
Vitamin D3 + K2
Softgels
80Good qualityCountry not stated8.3¢per 25 µg
87% more
- Pack
- $19.99240 softgels
- Vitamin D3 per serving
- 25 µgin 1 softgel
- Pack lasts
- 240 daysif you take 1 softgel (25 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 23
Nature's Bounty
Vitamin K2 + D3
Capsules
80Good qualityMade in USA8.5¢per 25 µg
90% more
- Pack
- $20.3560 capsules
- Vitamin D3 per serving
- 100 µgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (100 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 24
MRM Nutrition
Vegan Vitamin D3 & K2
Capsules
80Good qualityCountry not stated8.8¢per 25 µg
97% more
- Pack
- $13.1960 capsules
- Vitamin D3 per serving
- 62.5 µgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (62.5 µg) a day
mrmnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 25
Vitacost
Everyday Essentials, Vitamin D3 & K2, Natural Cherry
Tablets
80Good qualityCountry not stated9¢per 25 µg
103% more
- Pack
- $5.4360 tablets
- Vitamin D3 per serving
- 25 µgin 1 tablet
- Pack lasts
- 60 daysif you take 1 tablet (25 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 26
MRM Nutrition
Vegan Vitamin D3 & K2
Capsules
80Good qualityCountry not stated9.1¢per 25 µg
103% more
- Pack
- $13.5960 capsules
- Vitamin D3 per serving
- 62.5 µgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (62.5 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 27
Nature's Craft
Organic Vitamin D3 + K2 Drops, Alcohol-Free
Liquid
80Good qualityCountry not stated9.2¢per 25 µg
105% more
- Pack
- $21.9960 ml (2 fl oz)120 servings
- Vitamin D3 per serving
- 50 µgin 0.5 ml
- Pack lasts
- 240 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 28
Nature's Craft
Organic Vitamin D3 + K2 Drops
Liquid
80Good qualityCountry not stated9.2¢per 25 µg
105% more
- Pack
- $21.9960 ml (2 fl oz)120 servings
- Vitamin D3 per serving
- 50 µgin 0.5 ml
- Pack lasts
- 240 daysif you take 25 µg a day
shopnaturescraft.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 29
Nature's Bounty
Vitamin K2 + D3
Capsules
80Good qualityMade in USA9.4¢per 25 µg
110% more
- Pack
- $11.2430 capsules
- Vitamin D3 per serving
- 100 µgin 1 capsule
- Pack lasts
- 30 daysif you take 1 capsule (100 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 30
Nature's Truth
K2 + D3 with MK-7 Liquid Drops
Liquid
80Good qualityCountry not stated9.7¢per 25 µg
118% more
- Pack
- $11.5259.1 ml (2 fl oz)59 servings
- Vitamin D3 per serving
- 50 µgin 1 ml
- Pack lasts
- 118 daysif you take 25 µg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 31
Nature's Craft
D3 +K2, Cherry
Tablets
80Good qualityMade in USA9.8¢per 25 µg
120% more
- Pack
- $11.7760 tablets
- Vitamin D3 per serving
- 50 µgin 1 tablet
- Pack lasts
- 60 daysif you take 1 tablet (50 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 32
Healthy Origins
Vitamin D3 & K2
Softgels
80Good qualityCountry not stated9.9¢per 25 µg
123% more
- Pack
- $35.79180 softgels
- Vitamin D3 per serving
- 50 µgin 1 softgel
- Pack lasts
- 180 daysif you take 1 softgel (50 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 33
Nature's Answer
Vitamin D3 and K2 - Liquid
Liquid
80Good qualityMade in USA$0.10per 25 µg
124% more
- Pack
- $24.99250 servings
- Vitamin D3 per serving
- 25 µg
- Pack lasts
- 250 daysif you take 25 µg a day
naturesanswer.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 34
California Gold Nutrition
Vitamin D3 + K2
Capsules
80Good qualityCountry not stated$0.10per 25 µg
124% more
- Pack
- $6.0060 capsules
- Vitamin D3 per serving
- 25 µgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (25 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 35
Zahler
Junior D3 & K2
Tablets
80Good qualityMade in USA$0.10per 25 µg
133% more
- Pack
- $18.7190 tablets
- Vitamin D3 per serving
- 50 µgin 1 tablet
- Pack lasts
- 90 daysif you take 1 tablet (50 µg) a day
zahlers.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 36
vitafusion
Power Plus Vitamin D3 & K2 Gummy
Gummies
80Good qualityCountry not stated$0.11per 25 µg
149% more
- Pack
- $9.9960 gummies30 servings
- Vitamin D3 per serving
- 75 µgin 2 gummies
- Pack lasts
- 60 daysif you take 1 gummy (37.5 µg) a day
vitafusion.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 37
Swanson Vitamins
Vitamins D3 & K2 - 2,000 IU & 75 mcg
Capsules
80Good qualityCountry not stated$0.13per 25 µg
195% more
- Pack
- $15.7960 capsules
- Vitamin D3 per serving
- 50 µgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (50 µg) a day
swansonvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 38
Nordic Naturals
Vitamin D3 + K2, Great Orange
Softgels
80Good qualityCountry not stated$0.14per 25 µg
216% more
- Pack
- $16.9660 softgels
- Vitamin D3 per serving
- 50 µgin 1 softgel
- Pack lasts
- 60 daysif you take 1 softgel (50 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 39
Sports Research
D3 + K2, Plant-Based, 62.5 mcg/100 mcg
Softgels
85Good qualityMade in USA$0.15per 25 µg
243% more
- Pack
- $22.9760 softgels
- Vitamin D3 per serving
- 62.5 µgin 1 softgel
- Pack lasts
- 60 daysif you take 1 softgel (62.5 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 40
Healthy Origins
Vitamin D3 & K2
Softgels
80Good qualityCountry not stated$0.16per 25 µg
254% more
- Pack
- $18.9960 softgels
- Vitamin D3 per serving
- 50 µgin 1 softgel
- Pack lasts
- 60 daysif you take 1 softgel (50 µg) a day
healthyorigins.com (opens in a new tab)Checked Nov 1, 2026 · Label
Good to know
- Fact
- 2,694%more per 25 µg for the most expensive product than for the cheapest.
- Fact
- 149%more per 25 µg for the cheapest gummies than for the cheapest liquid.
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