MBP Osteo with Calcium, Milk Basic Protein, 90 Tablets, Source NaturalsSource Naturals MBP Osteo with Calcium Dietary Supplement. Advanced Bone Density Support. MBP Osteo is a next generation bone density formula based on the latest scientific insights. It combines the innovative ingredient MBP (Milk Basic Protein) with 500 mg of calcium, a dose that emerging science suggests is beneficial, and vitamin D 3 to maximize calcium absorption. Shown in four clinical studies to promote healthy bone density in just six months,