Abstract: This invention concerns novel calcium normalizing compositions containing as the active agent the amino acid methionine, and/or one or more related compounds including certain metabolic precursor compounds, and novel methods employing the compositions for normalizing or controlling calcium metabolism. The compounds include the methionine hydroxy analog, the S-methyl methionine analog, and methionine compounds having the structural formula I ##STR1## and pharmaceutically acceptable N- (mono- and dicarboxylic acid) acyl derivatives and alkyl esters thereof, where in is an integer from 1 to 3.