Does ProBiota HistaminX contain gluten or grains? Ceylon Keeslar November 16, 2020 23:15 Updated Follow Probiota HistaminX does not contain any gluten or grains. Related articles What are the ingredients in ProBiota HistaminX sourced from? Is ProBiota HistaminX free from GMOs? What is the purpose of each ingredient in Optimal Multivitamin Chewable? Practitioner Directory How many total SNPS and genes are evaluated with StrateGene? Comments 0 comments Article is closed for comments.