L. acidophilus occurs naturally in the human body as well as many fermented foods, such as sauerkraut and miso. Manufacturers also add L. acidophilus to yogurt and other dairy products.
Even though L. acidophilus has been isolated from multiple origins associated with humans, it has been established that its environmental space is the gastrointestinal tract. Studies show that dietary ingestion is the main factor in acquiring human carriage of L. acidophilus.
References:
María Remes Troche J, Coss Adame E, Ángel Valdovinos Díaz M, et al. Lactobacillus acidophilus LB: a useful pharmabiotic for the treatment of digestive disorders. Therap Adv Gastroenterol. 2020;13:1756284820971201. Published 2020 Nov 24. [L]
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