At 10,000 IU per softgel, this is a high-dose **Vitamin D3** designed for every-third-day dosing — averaging roughly 3,300 IU daily, which lands right in the clinically supported 1,000–5,000 IU range for maintaining healthy blood levels. The cholecalciferol form (D3) is the most effective at raising and sustaining your vitamin D status, and each softgel comes in olive oil to support absorption since D3 is fat-soluble.

Your body uses vitamin D for far more than bone health — it plays a role in immune regulation, muscle function, and hormonal balance. Deficiency is extremely common, especially if you live in a northern climate or spend limited time outdoors, making this one of the more broadly useful supplements you can take.

The key thing to know: follow the label's every-3-day direction. Taking one softgel daily would put you at 10,000 IU — well above the 4,000 IU tolerable upper limit and into a range that can cause calcium buildup over time. If your doctor has tested your levels and recommended daily high-dose supplementation, that's different — but don't default to daily use without bloodwork.