If you refrigerate food, it will last longer because the cold slows down bacterial growth.
This does not apply to all foods though.
Processed foods for example are unhealthy when highly eaten on a daily basis or not properly stored.
Even when refrigerated, some foods are potentially harmful and do nothing for your health.
Here are some foods usually in your refrigerated that you should consider crushing out your weekly grocery list.
Weaver CM, Dwyer J, Fulgoni III VL, King JC, Leveille GA, MacDonald RS, Ordovas J, Schnakenberg D. Processed foods: contributions to nutrition. The American journal of clinical nutrition. 2014 Apr 23;99(6):1525-42.
Monteiro CA, Cannon G, Moubarac JC, Levy RB, Louzada ML, Jaime PC. The UN Decade of Nutrition, the NOVA food classification and the trouble with ultra-processing. Public Health Nutrition. 2018 Jan;21(1):5-17.
U.S. Food and Drug Administration. Food Labeling Guide: Guidance for Industry. January 2013.