You should avoid guessing what your body needs, especially when you can test for this and get a precise indication of what is needed, and what is not. Deficiencies are so often missed either because they are never tested for, or simply inadvertently overlooked. Oftentimes the greater limiting factor is the insufficient knowledge of which tests to order and, moreover, where to go to get the test(s) you need. Thankfully, steeped in a tradition of evidence-based medicine, Dr. Gengo is highly experienced in the area, and armed with the most advanced nutritional testing and diagnostics available.