Beginning this year, Oscar Mayer stopped adding artificial preservatives to their hot dogs. Taking their place is celery juice, a natural source of the preservative sodium nitrite. This week Chemical & Engineering News (C&EN), the newsmagazine of the American Chemical Society, examines the trend toward "clean labels" and natural preservatives, and the efforts to incorporate them without sacrificing the quality or shelf-life consumers have come to expect.
The long road to all-natural preservatives
Artificial preservatives such as sodium nitrate, sodium benzoate and propionate have long been the norm in food preparation because they are cheap and effective in small amounts. But as C&EN Senior Business Editor Melody Bomgardner reports, both consumers and manufacturers are increasingly demanding foods that contain natural, more recognizable ingredients. In response, the food industry is evaluating more plant-based solutions to deter microbes, slow spoilage, and maintain color, flavor and texture on the shelf. The goal is to prune labels of intimidating synthetic chemicals and replace them with ingredients that shoppers will recognize from the produce aisle, such as rosemary, garlic, ginger, cinnamon and clove.
Of course, "natural" is not necessarily the same as "safe" or "healthy." Nitrites are used in cured meats to prevent the growth of deadly botulism-causing bacteria, but health researchers have identified the preservative as a possible carcinogen. The risk is the same regardless of whether the nitrites come from celery juice or artificial sources. Additionally, some natural alternatives may not be as effective or practical as synthetic options. Acetic acid — also known as vinegar — is a clean-label solution to microbe control, but its pungent flavor makes it unsuitable in many food applications. It is also less effective than the lactic acid and sodium benzoate it replaces. Finding plant-based alternatives for every synthetic preservative is a tall order, but if current demand continues, consumers can expect to see more natural ingredients on labels in the future.
"The long road to all-natural preservatives"
American Chemical Society, ACS is a congressionally chartered independent membership organization which represents professionals at all degree levels and in all fields of chemistry and sciences that involve chemistry.
