Is Yeast an Acid or Alkaline? Understanding a Fungus and Fermentation
                                
                                
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                                    3 min read                                
                            
                                Contrary to simple categorization, yeast is a living fungus that is neither an acid nor an alkali itself, but it thrives and ferments best in a slightly acidic environment. Its metabolic activity significantly alters the pH of the medium it inhabits.