Probiotics may be a relatively simple and inexpensive way to treat people after a COVID exposure, a new study suggests.

Researchers are working toward genetically engineered bacteria that monitor chemical production from inside a person's gut and fix any imbalances.

If left out, raw milk can become home to a huge amount of antimicrobial-resistant bacteria. Researchers also found it doesn't have much probiotic value.

Probiotics adapt to the gut, research finds. "...what you put in your body is not necessarily what's going to be there even a couple hours later."

Probiotics for stomach viruses? Not effective, according to new research. "The results...were not ambiguous."