There is disclosed a method of combining mesenchymal stem cells (MSCs) with a bone substrate. In an embodiment, the method includes obtaining tissue having MSCs together with unwanted cells. The tissue is digested to form a cell suspension having MSCs and unwanted cells. The cell suspension is added to the substrate and the MSCs are allowed to adhere. The substrate is rinsed to remove unwanted cells. In an embodiment, there is disclosed an allograft product including a combination of MSCs with a bone substrate made according to the described method. Other embodiments are also disclosed.
