DL-Methionine tablets maybe used as a source of this essential amino acid.

DL-Methionine may be used to prevent the formation of magnesium ammonium phosphate crystals in the urine. These crystals are commonly called struvite, Struvite is the most frequently involved mineral in uroliths that occur in feline lower urinary tract disease (LUTD) also known as feline urologic syndrome (FUS). Struvite crystals are more soluble in acid urine and tend not to develop and will eventually dissolve as urinary pH is reduced. Methionine is effective in increasing urine acidity.