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| Particle Particle Size Parts Per Million (Ppm) Pathogen Peat Pectine Peptide Permeability Pesticides Pext Ph Phagocyte Polymer Prebiotic Probiotic Protein (Protid) Protein-Prion |
| Preparations of live microorganisms added to food (or used as animal feed), claimed to be beneficial to health by restoring microbial balance in the intestine. The organisms commonly involved are lactobacili, bifidobacteria, streptococci, and some yeasts and moulds, alone or as mixtures. |