In accordance with at least one exemplary embodiment, a method and system of producing peanut hull flour is disclosed. The peanut hull flour can be fit for human consumption as, for example, a food-grade fiber additive. In an exemplary embodiment, a peanut hull mass (or supply) can be treated with an oxidizing solution such as a 3-70% hydrogen peroxide solution for one or more minutes to twelve hours. The peanut hull mass (or supply) can also be washed with an alkaline solution. Moreover, the peanut hull mass (or supply) can be dried to a resulting moisture content of 1-10%. Further, the peanut hull mass (or supply) can then be reduced to peanut hull flour, for example, by using a flour grinder system.