The present invention is directed to a method for treating symptoms associated with Restless Legs Syndrome. Clay compositions containing at least 10 weight % of clay and spent bed material, as well as ceramic compositions containing spent bed material, are also provided. In another aspect, the present invention is also directed to a method for imparting to a composition comprising at least one peptide copper complex, chemical stability as well as resistance andor toxicity to microbial growth, where the method comprises incorporating a non-formaldehyde-donating preservative in the composition. Oxygen surrounding the electrodes causes current to flow between the electrodes and the IC chip varies the value of current generated by a current source coupled between the working electrode and counter electrode in a manner to maintain the voltage between the working electrode and reference electrode at a preselected value. Then, advancing the mask and substrate in the first direction includes using the first mask, and advancing the mask and substrate in the second direction, opposite the first direction, includes using the second mask. A tamper-evident enclosure surrounds the memory elements, which if breached, becomes readily apparent to the user.