A deodorizer device for controlling body odor comprises a structure having an external metal oxide surface with a contour to contact the surface of the skin where perspiration is produced and is degraded by bacterial organisms on the skin into body odor. The metal oxide surface is reactable with water supplied to the surface of the skin to render the bacterial organisms ineffectual to degrade perspiration later produced on the skin into body odor. The deodorizer device together with a water source form a deodorizer system. A method of controlling body odor involves supplying water to the surface of the skin where perspiration is produced and is degraded by bacterial organisms into body odor and, at the same time, contacting the surface of the skin with a metal oxide surface of a deodorizer device.