Vitamin D3 + K2 by Vital Nutrients

If your Vitamin D, 25-Hydroxy is in the lower part of the normal range and you want a steady maintenance dose, vitamin D3 K2 at this strength fits. It’s practical if you get little sun, have darker skin, consistently use sunscreen, or live at northern latitudes. Post‑menopausal women and adults with higher body weight often need more than diet alone. For established deficiency, you’ll usually need a higher short‑term repletion plan, then step down to this level.

Cholecalciferol (vitamin D3) is well‑absorbed and long‑acting, and your body converts it to a hormone that increases calcium uptake from the gut while curbing parathyroid hormone (the signal that pulls calcium from bone). Vitamin K2 as menaquinone‑7 (MK‑7) has a long half‑life and activates osteocalcin (a bone‑binding protein) and matrix Gla protein (a vascular calcium‑guard). Observational data link K2 to less arterial calcification, but randomized trials are mixed, so think of K2 as supportive, not a stand‑alone fix.

Take one capsule daily with a meal that contains some fat to improve absorption. This 2,000 IU vitamin D3 plus 150 mcg K2 MK‑7 is a maintenance‑level dose for most adults. If your level is low, confirm with Vitamin D, 25‑Hydroxy and recheck 8–12 weeks after starting; clinicians often use higher short‑term dosing before maintaining here. You don’t need to pair this with high‑dose calcium unless your diet is low, and spreading calcium through meals is gentler on the gut.

If you take warfarin (a vitamin K antagonist), do not start vitamin K2 without your prescriber; consistent K intake is essential and dosing may need adjustment. Orlistat and bile acid binders like cholestyramine reduce D absorption, so separate by several hours. Some anti‑seizure drugs increase D breakdown. Thiazide diuretics can raise blood calcium when combined with D; those with a history of high calcium, kidney stones, or sarcoidosis (which can overproduce active D) should use clinician guidance.

Does K2 keep calcium out of arteries? It helps activate matrix Gla protein, a natural calcium blocker in vessel walls, but human trials show mixed results, so use it as part of a broader plan. Do you need extra calcium with vitamin D3 K2? Not if your diet already supplies enough; vitamin D improves absorption of what you eat, and routine mega‑dosing calcium isn’t necessary for most.