Plenty of people swear by probiotics for digestive health and immunity. But research now suggests that the “good bacteria” has a lot of benefits to skin health too. According to Whitney P. Bowe, MD, stress alone or in combination with processed foods that lack fiber can slow digestion and boost unhealthy bacteria. The immune system springs into action to counter this potential threat resulting in inflammation, redness or breakouts. The healthy signals produced by the probiotics stop the skin cells from sending “attack” messages to the immune system that result in flares of acne or rosacea.