METHIONINE
It is an essential amino acid meaning dogs and cats need it but cannot make it in their bodies. So, it needs to be included in the diet.
It helps the liver to process lipids and prevents disorders of the hair, skin and nails.
It protects kidneys by trapping heavy metals, regulates formation of ammonia by acidifying the urine.
It is essential for absorption, transportation, and bioavailability of selenium and zinc in the body.