Controlling the enzymatic browning is a major challenge in the mushrooms industry. One of the most common methods for extending the shelf-life of fresh mushrooms is washing them with aqueous solutions of citric acid or citrates. The European legislation establishes the preservatives that can be added to fresh mushrooms, including citric acid/citrates and ascorbic acid/ascorbates. The addition of citric acid or ascorbic acid results in lowering the pH and the subsequent inhibition of the enzyme activity, which is pH sensitive