What specific strain numbers are in each probiotic? Education Team February 12, 2021 17:47 Updated Follow With the exception of the ProBiota HistaminX, the probiotic strain numbers are proprietary. To see ProBiota HistaminX strain numbers, see ProBiota HistaminX Strains article. Related articles What are the ingredients in Saccharomyces Boulardii sourced from? Comments 0 comments Article is closed for comments.