Vitamin D3 and Vitamin K2 work in a critical physiological partnership that most supplements separate to their detriment: D3 increases intestinal calcium absorption and stimulates calcium-binding proteins — but without adequate K2, the activated calcium cannot be directed to bone and may instead deposit in arterial walls and soft tissues. Ortho Molecular Liquid D3 with K2 delivers both nutrients together in their most bioavailable forms, ensuring that the calcium mobilized by D3 is properly directed to bone matrix rather than cardiovascular tissue.Vitamin D3 (Cholecalciferol) is the preferred supplemental form, identical to what skin produces from sunlight, and is 87% more potent at raising serum 25(OH)D levels than D2. The liquid format allows for precise dose adjustment and superior absorption compared to capsules. Vitamin K2 (as MenaQ7® PRO MK-7, Menaquinone-7) — Ortho Molecular is the exclusive provider of this specific form — is the most clinically studied K2 with the longest half-life (up to 72 hours), ensuring sustained activation of osteocalcin and matrix-Gla protein (MGP). MGP activation is the mechanism by which K2 prevents arterial calcification. MenaQ7® PRO is supported by clinical trials showing improvements in bone mineral density and arterial flexibility markers.1oz (30ml) liquid. Convenient drop format for flexible dosing. Gluten-free, soy-free. GMP certified. Take as directed by your healthcare professional. Available at Beauty Riche with same-day shipping.