Vitamin D3 and K2 work together to benefit bone health, cardiovascular support, and healthy immune function.* Maintaining an optimal level of vitamin D throughout all stages of life helps maintain strong bones and healthy immune function.* Adding vitamin K2 helps move calcium to the bones to protect soft tissues, such as the arteries and kidneys, from calcification.* Combining vitamins D3 and K2 provides greater benefit together than each offers separately. Benefits of Thorne’s Vitamin D + K2: Supports a healthy heart and blood circulation Promotes bone health and calcium absorption Benefits immune function The combination provides advanced bone health support Features of Thorne's Vitamin D + K2: The vitamin K2 in this formula is MK-4, the most clinically studied form of vitamin KVitamin D, in its D3 form, is a more potent and better absorbed form than its D2 formThe self-dispensing top provides an accurate, safe, and individualized dose by metering individual drops. Thorne's Vitamin D + K2 Liquid is in medium chain triglyceride oil and preserved with mixed tocopherols