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Enzyme Information


I.U.B. 9031-11-2


Lactase breaks down lactose, the sugar found in milk and dairy products. As humans age, lactase secretion decreases and the consumption of dairy products becomes a discomfort for many. Supplemental lactase works alongside any lactase the body produces to gain the benefits of dairy consumption without the gastric distress associated with lactose intolerance.

The food grade lactase enzyme used in National Enzyme Company products is obtained by the controlled fermentation of Aspergillus oryzae and is characterized by its ability to hydrolyze lactose over a wide range of temperatures and pH. This lactase catalyzes the hydrolysis of the lactose beta-D- galactoside linkage liberating one mole of D-glucose and one mole of D-galactose.


One FCC Acid Lactase Unit (ALU) is defined as the quantity of enzyme that will liberate one micromole of o-nitrophenol per minute at 37°C and a pH of 4.5. It is based on a 15-minute hydrolysis of an o-nitrophenol-beta-D-galactopyranoside substrate.


This enzyme is used in the dairy industry to hydrolyze lactose in milk, whey, cheese, yogurt and other dairy products. Hydrolysis of lactose increases the sweetness of the final product. Glucose and galactose are the end products of the reaction. Lactase is also used as a digestive aid and to treat lactose intolerance.

Shelf Life:

To maintain optimum enzyme activity, this product should be stored in a cool, dry place in a tightly sealed container. When properly stored, this product can be expected to lose less than 10% of its activity in twelve months.

Typical Side Activities:

α-L-arabinase, glucanase, glucosidase and transferase


  • Form: Dry powder
  • Color: Off white to light tan
  • Odor: Free of offensive odor
  • Taste: Free of offensive taste
  • Effective pH Range: pH 3.0 to 8.0
  • Optimum pH: pH 4.5 to 6.0
  • Effective Temperature Range:Up to 55°C
  • Optimum Temperature: 55°C

Nothing disclosed above is to be construed as a recommendation to use our product in violation of any patents. The information presented above is believed to be accurate. However, said information and products are offered without warranty or guarantee except as to the composition and purity stated herein since the ultimate conditions of use and variability of the materials treated are beyond our control.

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