Food irradiation is a food processing technique that exposes food to ionizing radiation like gamma rays, x-rays or electron beams to kill microorganisms, insects and delay spoilage. The US Army first investigated using irradiation to improve food safety in 1930. Major approvals for uses of irradiation were granted by regulatory agencies starting in the 1960s. Sources of radiation for food irradiation include electron beams, x-rays and cobalt-60. Irradiation can help prevent foodborne illness and extend shelf life by inhibiting microbial growth and sprouting. While it provides benefits like preserving nutrients and freshness, it also faces challenges like high costs and developing resistant microbes. Regulatory agencies worldwide have endorsed the safety of irradiated foods.