Lactobacillus casei is a mesophilic bacterium i.e. gram positive, rod shaped, non-spore, nonmotile, anaerobic that can be found in various environments such as raw and fermented dairy products, intestinal tracts and reproductive systems of humans and animals, and fresh and fermented plant products.
It helps protect the human body from disease and illness by restricting the growth of various types of harmful bacteria that cause infection and be detrimental to an individual's health. Lactobacillus casei suppressed blood corticosterone levels.
Lactobacillus casei is beneficial in both respiratory and gastrointestinal infections. Lactobacillus casei extract can kill gastric cancer cells and thereby can decrease the viability of liver cancer cells by 77%.
The lactic acid produced by L. casei through fermentation is very important since it can be used to make cheeses and yogurts, reduce cholesterol levels, enhance immune response, control diarrhoea, alleviate lactose intolerance, inhibit intestinal pathogens, and serve as probiotics.