Not without talking to the physician who manages that prescription first. This is the most important line on this page.

Warfarin and other vitamin K antagonists work by interfering with vitamin K recycling. Any change in your vitamin K intake, in either direction, can shift how that medication behaves and change your INR. Menaquinone-7 in particular stays in circulation far longer than vitamin K1, so it is not something that washes out between doses. The relevant drug class is vitamin K antagonists, which includes warfarin under its various brand names.

This does not automatically mean you cannot take vitamin K2. It means the decision belongs to your prescribing physician and needs INR monitoring, not a supplement label. Bring the bottle to your appointment and show them the 180 mcg figure.

It depends entirely on your current status, and that is not a dodge. The National Academy of Medicine sets the adult Tolerable Upper Intake Level at 4,000 IU per day, so 5,000 IU sits above it. We are not going to pretend otherwise.

In clinical practice, 5,000 IU is a routine repletion dose for adults with documented insufficiency, and endocrinology guidance has long allowed higher daily intakes than the NAM ceiling for adults at risk. But an upper limit exists for a reason, and vitamin D is fat-soluble, meaning it accumulates rather than clearing daily.

The honest answer: get a serum 25-hydroxyvitamin D test, share the result with your physician, and let that number decide whether this dose is appropriate for you and for how long. If you are already taking vitamin D from a multivitamin or another formula, add those amounts together before you start.

That footnote is on the printed label as manufactured. The FDA does publish a Daily Value for vitamin K of 120 mcg for adults, so this is a labeling point we have flagged internally and are reviewing with the manufacturer for the next print run.

For your purposes the number that matters is the one stated in micrograms: 180 mcg of vitamin K2 as MK-7 per capsule. That figure is accurate and is what we formulated to.

Yes, and specifically with food containing some fat. Both vitamin D3 and MK-7 are fat-soluble and are absorbed through the same lipid pathway as dietary fat. Taken on an empty stomach or with a fat-free meal, absorption drops meaningfully.

You do not need much. Eggs, avocado, olive oil, nuts, fatty fish, or a fish oil capsule taken at the same time all do the job.

You may not, and we would rather tell you that than sell you a timeline we cannot back up. Vitamin D repletion is not a sensation. Some people with genuinely low status notice changes in energy or mood as their level normalizes, and many people notice nothing at all while their labs move substantially.

Serum 25(OH)D rises gradually and approaches a new steady state over roughly two to three months of consistent daily intake. That is the reason we point you toward a retest at around 90 days instead of asking you to judge by feel.

In most cases yes, but check the labels for overlap first. Several multi-nutrient formulas include vitamin D, vitamin K, or both, and the totals stack. If you are taking a multivitamin alongside this, add the vitamin D amounts together and confirm the combined daily total is what you and your physician intended.

The three formulas we recommend pairing with this one are covered in the stack section above. If you want a specific combination reviewed, our customer service team can help.

The capsule is vegetarian: hypromellose and purified water, no gelatin. The MK-7 is produced by bacterial fermentation and is not animal-derived.

Vitamin D3 as cholecalciferol is most commonly manufactured from lanolin, which is sheep's wool oil, though lichen-derived D3 also exists. We label this product as vegetarian rather than vegan, and if the D3 source is a determining factor for you, contact customer service before ordering so we can confirm the current raw material for your batch.

One hundred. The bottle contains 100 vegetarian capsules and the serving size is one capsule, so at the suggested use of one per day a bottle runs a little over three months. At $28.00 that works out to 28 cents per day, or about 23.8 cents per day on the subscription price.

Talk to your physician before starting. Vitamin D increases calcium absorption, and conditions involving impaired kidney function, hypercalcemia, hyperparathyroidism, sarcoidosis, or a history of calcium-based kidney stones all change how a repletion-level vitamin D dose should be handled. Certain medications, including thiazide diuretics and digoxin, are also relevant to calcium status.

This is not a reason to assume the product is off limits. It is a reason for the decision to be made by someone who has your labs in front of them.