Generally, products are sold with 50% active ingredients. For example, alcohol preparations: preparations based on dextrin powder containing 50% polylysine by mass, with a volume fraction of 30-70% alcohol added, mainly used in various egg products. Acetic acid preparation: Add a volume fraction of 0.5% to 5.0% acetic acid, mainly used in foods such as rice and salads; Glycerin preparation: The added amount is O.01%~5% by volume, mainly used in foods containing a high amount of animal protein milk protein; Glycine preparation: The addition amount is 0.01% -10% by mass, and when combined with polylysine, the synergistic antibacterial effect is better.