Thorne Vitamin D + K2 Liquid, 1 fl oz, 600 Servings
About 1,000 IU of vitamin D3, plus vitamin K2 (MK-4), in 2 drops
$34.00
In stock · price checked November 12, 2026
Free shipping on orders over $35
600 servings · $0.06 for 2 drops · $0.06 per 1,000 IU
NSF/ANSI 173
NSF's list names Thorne Vitamin D + K2 as a liquid.
Buy nowOur take
This small Thorne bottle gives vitamins D3 and K2 as drops. Amazon lists K2 as MK-4, and a serving is 2 drops with about 1,000 IU of vitamin D3. The bottle makes 600 servings.
The cap is a metered dispenser, so each push gives one measured drop. To see how drops compare with other liquid vitamin D, read our liquid vitamin D drops guide.
Pick it if you want D3 and K2 in one liquid with a long-lasting bottle. Prefer a softgel? Horbaach has 5,000 IU of D3 plus K2 in 180 softgels (see below).
Key facts
| Vitamin D3 per serving | About 1,000 IU in 2 drops |
|---|---|
| Vitamin K2 form | MK-4 |
| Bottle size | 1 fl oz (600 servings) |
| Cost per serving | $0.06 at $34.00 |
| Cost per 1,000 IU | $0.06 |
| Testing | NSF/ANSI 173 (NSF lists Thorne Vitamin D + K2, liquid) |
| Dispenser | Metered, self-dispensing top |
Common questions
How many drops are in a serving of Thorne Vitamin D + K2 liquid?
A serving is 2 drops, with about 1,000 IU of vitamin D3. The bottle is rated for 600 servings.
Is Thorne Vitamin D + K2 liquid tested by anyone outside the company?
NSF's list of certified dietary supplements includes Thorne Vitamin D + K2 as a liquid. Amazon's title also says NSF Contents Certified.
What does a serving cost?
It was $34.00 on November 12, 2026. That is $0.06 for 2 drops, or $0.06 for each 1,000 IU of vitamin D3.
What kind of vitamin K2 is in it?
Amazon's listing gives the K2 form as MK-4. Many softgel products use MK-7 instead, which is a different form of K2.
