Functional Medicine refers to an approach to patient care that involves the identification of underlying imbalances and predisposing factors to any disease or dysfunction. Therapy is then directed toward correcting the underlying imbalance using the safest and most bio-compatible methods possible. Specialized functional testing beyond the usual laboratory tests may be necessary to help uncover the functional impairment. This method is especially useful in treating chronic gastrointestinal problems, immune system imbalances and fatigue syndromes. Dr. Krassner employs this approach in situations where it appears applicable.