What are some natural ways to keep ingredients fresh?

 Natural Antibacterial Preservation Methods

 Vinegar Water Soaking

 Suitable for vegetables (e.g., cucumbers, broccoli): Soak in 1 liter of water mixed with 1 tablespoon of white vinegar for 5 minutes, then drain. This inhibits surface bacterial growth and extends refrigerated freshness by 1–2 days.
 Principle: Acetic acid reduces the environmental pH value, suppressing microbial growth.

 Saltwater Treatment

 Suitable for berries (e.g., strawberries, grapes): Soak in clear water with a pinch of salt for 10 minutes to kill surface molds. After draining, pat dry with a kitchen towel before refrigerating, extending freshness by 3–5 days.

 Ginger/Lemon Antiseptic

 Place several slices of ginger or lemon in leftover containers, or apply them to cut surfaces (e.g., avocados, apples). The gingerol and citric acid they contain delay oxidation and bacterial proliferation.