Bio-Max Series. Hypo-Allergenic. Casein & Gluten Free. Kirkman® offers calcium capsules with and without vitamin D at the request of physicians. The Calcium with vitamin D capsule is hypoallergenic and does not contain additives. This product is part of the Bio-Max series that uses forms of nutrients that have clinically proven to be among the best absorbed and most highly bioavailable. . The calcium capsules utilize calcium bis-glycinate amino acid chelate which has been demonstrated to have superior absorption qualities.