Garvicin KS, GakA is a peptide at sizes of 34 amino acids to form bacteriocin garvicin KS (GarKS), with other 2 peptides , GakB, and GakC. Garvicin KS, GakA inhibits fibroblast viability and proliferation. Garvicin KS, GakA with GakB, is a potent combination with good peptide stability, antimicrobial efficacy, and fibroblast viability/proliferation effects. Garvicin KS peptides inhibit MSSA with MIC values in the order GakB >GakC >GakA.