Free radicals are an important entity in chemistry and in health, having been researched for many years with connections to cellular changes that may impact overall health and aging. A free radical is a molecule that has an unpaired electron in the outer shell, which creates instability and a high rate of reactivity with other molecules. Free radicals are produced as a normal part of cellular respiration or energy production, but can also be generated as a consequence of environmental factors, stress, poor diet, food additives, medications and genetics. In general, they can have huge negative impacts on overall health, performance and sustainability, but the good news is that with understanding, we also realize that there are things we can do to minimize the damage inflicted.