To some degree
Pepsin is an enzyme which digests protein
in the stomach into smaller peptides.
Generally, pepsin has maximal activity in an acidic (low ph) environment and looses activity as the pH rises reflecting a less acidic or more alkaloid environment. It is thought that pepsin has some activity up to a pH 0f 8. Since pH 7 is neutral, there may sill be some pepsin activity between a phs of 7 to 7.9.