Note: This formula has been made with potassium sorbate and benzyl alcohol to prevent yeast, mold, and bacteria growth. Because they work in a low pH environment, citric acid and lactic acid are added. The amounts of preservatives are low, between 0.1% and 0.2%. The active ingredient ammonium molybdate remains the same, with the concentration of 25 µg of elemental molybdenum per drop.
