What is the most fundamental nutrient? It’s oxygen. Think about it. You can go 40 days or so without food. You can go maybe 3-4 days without water. But you can’t go 3-4 minutes without oxygen. There are many ways to use oxygen to enhance health and vitality, including the most obvious: aerobic exercise. Exercise increases “oxygen utilization” which ultimately drives the myriad enzyme systems in the body to produce more energy (ATP).