A strain of healthy bacteria can kill harmful bacteria in lab tests
The Claim: Some probiotics, healthy bacteria commonly known for improving digestion and boosting the immune system, also can kill pathogens, such as those that cause food poisoning and others that cause illnesses such as strep throat.
The Verdict: A probiotic lozenge can reduce incidence of strep throat, according to published research by Italian scientists. A Harvard University scientist found another strain, which is added to some smoothies and raw juices, can kill a wide variety of harmful bacteria in lab tests. The use of probiotics to kill pathogens is a promising area but most of the work is still preliminary, scientists say.