A mandolin having an integrated armrest provides a comfortable armrest while still allowing greater flexibility between the top and the sides of the mandolin, resulting in a construction which does not increase the rigidity of the connection between the carved top and sides of the instrument. In various aspects, the present invention comprises administering one or more epicatechin derivatives in an amount effective to stimulate mitochondrial function in cells. The antenna may be positioned about the exterior andor the interior of the asset and significantly increases the range of signals that may be received andor broadcast by the responding device.