Probiotics are naturally occurring microorganisms. In most cases they are bacteria and are similar to the friendly bacteria found in the gut or skin. Lactobacillus and bifidobacterium are common probiotics that are found in many foods such as yogurt, unpasteurized milk, fermented soy and yeast, and infant formula.
People with eczema have what is believed to be a disorder of cells of the immune system. Probiotics have been used as a treatment for eczema in children. But a Cochrane Collaboration review of 12 studies involving 781 children concluded that there is no evidence that probiotics in supplement form reduce the symptoms of eczema or change its severity.
Probiotics for Eczema
The 12 studies were conducted between 2003 and 2008. The children ranged in age from 1 month to 13 years, but most of them were under 18 months old and appeared to have an allergy to cow's milk. The probiotic strain used most commonly in the studies was Lactobacillusrhamnosus, either alone or in combination with other probiotic bacteria.
The trials did not note any negative reaction to probiotics, but when Cochrane researchers dragged a net through a wider pool of studies, they found 46 cases in which probiotics were implicated in infection, bowel tissue damage, and even death, says Robert Boyle, MD, the lead researcher in the review.
Boyle is an allergist who teaches medicine at Imperial College in London. The bowel damage and fatalities occurred in patients with severe pancreatitis, he says.
"A wider trawl of literature showed that although probiotics are recognized as a safe treatment in otherwise healthy people, in people who are severely unwell, there is a significant risk in using probiotics," he says.
Boyle says he also wouldn't recommend giving infants probiotics, even if the infant is healthy. And he would not advise anyone with eczema to use probiotics because, he says, there are more effective treatments.