The world produces enough food to feed everyone, yet hundreds of millions of people still go hungry. One major reason is food waste. About one-fifth of all food produced globally is lost before it reaches people’s tables. Imagine throwing away one out of every five bags of groceries you buy, which is similar to what happens worldwide. This waste worsens global hunger and increases greenhouse gas emissions from farming, transportation, and landfills. Scientists are now developing some innovative tools to fight the problem, including viruses, silk, smart packaging, and artificial intelligence.

One solution involves bacteriophages (phages), viruses that attack harmful bacteria but do not infect humans. Researchers at McMaster University created gels packed with billions of phages that can be sprayed onto food or placed on as removable patches. During tests, they killed drug-resistant E. coli on lettuce and raw meat and prevented food contamination. Scientists have also developed microneedle patches that deliver phages below the surface of food to fight dangerous bacteria such as E. coli and Salmonella.

Food packages could soon become smarter too. A new package design features sensors that continuously check food for harmful microorganisms. One could scan the barcode and see the results on a smartphone without opening the package. AI can also identify contamination much faster. An AI system detected E. coli on lettuce within three hours, while traditional tests may take several days.

Other researchers are using silk protein (fibroin) to keep food fresh. A team at the Massachusetts Institute of Technology developed a transparent, edible silk coating that can extend fruit’s shelf life by about a week. Scientists have also created coatings that slow ripening, kill bacteria, and remove pesticide residue.

While these inventions sound promising, they may increase food prices. Some consumers may also feel uncomfortable eating food treated with viruses or nanoparticles. If scientists can prove these technologies are safe, affordable, and effective, they could transform how we protect food and reduce waste.