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Nowadays, the usage of probiotics in the food industry has become common. It has been proven that probiotics have many health benefits, such as adjusting the intestinal microbiome, boosting the immune system, and enhancing anti-inflammatory and anti-cancer activities. However, in recent years, some concerns have arisen about the consumption of probiotics, especially in vulnerable populations such as elderly, infants, and people with underlying diseases. As a result, finding a new alternative to probiotics that has the same function as probiotics and is safer has been prioritized. In recent years, postbiotics have been introduced as a great replacement for probiotics. However, the safety of these compounds is not exactly confirmed due to the limited in vivo research. In this review, the definition, classification, activities, limitations, and some advantages of postbiotics over probiotics are discussed. Finally, the limited published data about the safety of postbiotics is summarized.
Harat et al. (Thu,) studied this question.