Vitamin D3 25,000 IU with Vitamin K2 MK-7 is high potency vitamin D3 (25,000 IU or 625 mcg) and vitamin K2 (MK-7) designed to support bone health, heart function, and immune balance.* This pairing ensures calcium is efficiently absorbed and properly utilized where it’s needed most.* Formulated for purity and efficacy. Diminished time outside, frequent use of sunscreen, and living at latitudes with scarce winter sunlight can all negatively affect vitamin D levels. Vitamin D’s role in helping the body absorb and retain both calcium and phosphorus is critical to building bone.* It also plays a role in mood balance and immune health.* Monitoring of vitamin D blood levels (25-OH vitamin D) is recommended with higher potency vitamin D3.