Often sold in one product
Vitamin D3 + K2
Vitamin D3 and K2 are often sold together. Here’s what the two cost when you buy them separately.
6.9¢a day
at the lowest prices, quality 75+
$0.53with typical prices
$2.10
a month
$25
a year, at the lowest prices
What it’s for
Vitamin D helps your body take up calcium. Vitamin K2 is needed for proteins that build that calcium into bones – that’s why the two are often sold together. Vitamin K affects blood thinners like warfarin: ask your doctor first.
Not medical advice.
What’s in it
Vitamin D
25 µg vitamin D 25 µg is more than the 15–20 µg recommended a day for adults (NIH).Not a recommendation. Not medical advice.
- Lowest
- 1.2¢
- Typical
- 8.2¢
Vitamin K (K1 & K2)
100 µg vitamin K 100 µg is within the 90–120 µg a day that’s considered adequate for adults (NIH).Not a recommendation. Not medical advice.
Prices: Vitamin K2 only
- Lowest
- 5.8¢
- Typical
- $0.45
Each color is one part of the combo – per day.
| Part | Lowest | Typical |
|---|---|---|
| Vitamin D | 1.2¢ | 8.2¢ |
| Vitamin K (K1 & K2) | 5.8¢ | $0.45 |
Bought separately
Ready-made D3 + K2 in one
Per 25 µg vitamin D. How much K2 comes with it differs from product to product.
See all 187 ready-made productsNot medical advice
We compare prices and label data. The amounts are the ones we compare by – usually the common amount on labels – not recommendations. Talk to a doctor or pharmacist before taking supplements, especially if you are under 18, pregnant or on medication.
Prices: our own check of 7,383 products in US online stores (Nov 1, 2026). How we check
