| http://www.w3.org/ns/prov#value | - Additionally, components of both the oral and parenteral and other forms of administration can include zinc salts, especially zinc citrate, as a buffer (i.e., about 0.5% in both the oral and parenteral preparations); dimethylsulfoxide (DMSO) to enhance epidermal penetration; chlorobutanol as a preservative; and an acid such as hydrochloric acid or a base such as sodium hydroxide to adjust the pH.
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