Peptidases are enzymes that split proteins into smaller peptides and amino acids. Taking them with a meal supplies extra digestive firepower, which can cut down on temporary bloating or gas from a protein heavy plate.
Some people also take peptidase supplements between meals to support immune function or a balanced inflammatory response. Evidence for these non-digestive uses is thinner, and the effects often depend on the specific enzyme blend and whether it reaches circulation intact.
Anyone on blood thinners or with a bleeding disorder should talk to a doctor before adding peptidases or any enzyme product.