However, it's worth noting that treating proteins with acid, through a process called acid hydrolysis, can lead to the production of D-amino acids. Acid hydrolysis breaks down proteins into individual amino acids, and under acidic conditions, the chiral centre of amino acids can flip, resulting in the formation of D-amino acids.

Enzymatic hydrolysis, which involves the use of enzymes to break down proteins, typically does not result in the production of D-amino acids, as enzymes are specific to L-amino acids.