Patients visiting National Hospital of Odonto-Stomatology for treating periodontitis used a food supplement (lozenge) containing chicken egg antibody (IgY) against Porphyromonas gingivalis gingipains as an adjunct to conventional scaling and root planing (SRP). After 8 weeks the patients were examined against. Parameters including probing depth (PD), bleeding on probing (BOP), number of P. gingivalis in periodontal pockets were evaluated and compared to the control group that had used placebo lozenges.