Is Sourdough High in Phosphorus? Understanding Bioavailability and Flour Type
                                
                                
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                                    4 min read                                
                            
                                While many whole grains are high in phosphorus, sourdough's long fermentation process significantly impacts mineral bioavailability by breaking down phytic acid. The question, "Is sourdough high in phosphorus?" requires looking beyond just the raw ingredient list to understand how the bread is made.