High to moderate certainty in the body of evidence suggests that LGG supplementation ( regardless of the timing of administration ) did not reduce the risk of eczema .
There was also no consistent effect on other allergic outcomes .
This meta- analysis shows that LGG was ineffective in reducing eczema .
Current guidelines recommend the use of probiotics to reduce the risk of  eczema .
It remains unclear which strain(s ) to use .
We systematic ally evaluated data on the efficacy of Lactobacillus rhamnosus GG ( LGG ) supplementation prenatally and /or postnatally for the primary prevention of eczema .
Lactobacillus GG treatment during pregnancy for the prevention of eczema: a randomized controlled trial
To cite this article : Boyle RJ , Ismail IH , Kivivuori S , Licciardi PV , Robins‐Browne RM , Mah L‐J , Axelrad C , Moore S , Donath S , Carlin JB , Lahtinen SJ , Tang MLK . Lactobacillus GG treatment during pregnancy for the prevention of eczema  : a r and omized controlled trial . Allergy 2011 ; 66 : 509–516
High to moderate certainty in the body of evidence suggests that LGG supplementation ( regardless of the timing of administration ) did not reduce the risk of eczema .
There was also no consistent effect on other allergic outcomes .
This meta- analysis shows that LGG was ineffective in reducing eczema .
Current guidelines recommend the use of probiotics to reduce the risk of  eczema .
It remains unclear which strain(s ) to use .
We systematic ally evaluated data on the efficacy of Lactobacillus rhamnosus GG ( LGG ) supplementation prenatally and /or postnatally for the primary prevention of eczema .