Vitamin K2 with D3 by Ortho Molecular Products

This fits adults using vitamin K2 with D3 to shore up bone strength while keeping calcium where it belongs. It’s a smart pick if your Vitamin D, 25-Hydroxy is in the lower part of the normal range, you get little sun, have darker skin, or live at northern latitudes. Post‑menopausal women and long‑term dairy‑avoidant eaters often benefit. The D3 here is a repletion‑level dose for many; the MK‑7 dose is conservative, good for maintenance if your diet includes leafy greens or fermented foods.

D3 raises calcium absorption and helps normalize parathyroid hormone (the signal that pulls calcium from bone). K2 as MK‑7 activates osteocalcin (the protein that locks calcium into bone) and matrix Gla protein (a protein that helps keep calcium out of artery walls). Together, they drive calcium toward your skeleton and away from soft tissues. In practice, PTH can improve within weeks; meaningful bone changes take months of steady intake and weight‑bearing exercise.

Take one capsule daily with a meal that contains fat for better absorption. If your Vitamin D, 25-Hydroxy is low, this 5,000 IU D3 level is commonly used for 8–12 weeks before retesting, then many step down. If your level is already adequate, consider less frequent dosing of D3 or a lower‑dose D3 under clinician guidance. Track calcium and PTH if you’re on long‑term higher‑dose D3.

Skip K2 supplements if you take warfarin or other vitamin K–antagonist blood thinners unless your prescriber adjusts your dose. Use caution with high‑dose D3 if you have a history of high calcium, kidney stones, sarcoidosis, or hyperparathyroidism, and monitor calcium. If you also take calcium, keep total daily intake reasonable and prioritize food sources; more calcium is not always better.