What is Neutral Lactase?
Neutral lactase is a lactose-hydrolyzing enzyme. It is produced via submerged fermentation of Kluyveromyces lactis, followed by refined extraction using microfiltration, ultrafiltration, and vacuum freeze-drying technologies.
Neutral lactase demonstrates optimal activity in a neutral environment with a pH range of 6.0-7.0. As an enzyme that efficiently breaks down lactose, its core function is to convert lactose into glucose and galactose, helping people with lactose intolerance digest dairy products.
Key Characteristics of Neutral Lactase
Wide pH adaptability: Its stable activity range covers neutral and weakly acidic environments, enabling it to function without additional pH adjustment.
Mild operating temperature: Most neutral lactases reach optimal activity at 30-40°C, which is highly consistent with the temperature environment of the human digestive process.
Compatibility with Human Intestinal Environment: The pH value in the human small intestine is close to neutral, where neutral lactase has higher activity. Compared with acidic lactase, it does not rely on gastric acid for activation and is suitable for a wider range of people.
Core Functions and Application Scenarios
Addressing Lactose Intolerance
People with lactose intolerance often experience symptoms like bloating, diarrhea, and abdominal pain after drinking milk due to insufficient lactase in their bodies. Supplementing with neutral lactase can directly break down lactose in the intestines and relieve these discomforts.
Optimizing Food Processing
In dairy product production, neutral lactase can break down lactose under normal temperature and neutral conditions. This improves product palatability and reduces nutrient loss during processing.
Main Application Scenarios
Its main application scenario is the industrial production of lactose-free dairy products, such as lactose-free milk and lactose-free milk powder. During production, after neutral lactase breaks down lactose, an inactivation process is required to ensure the enzyme is completely inactivated, preventing any impact on product stability.
Differences Between Neutral Lactase and Acidic Lactase
The core differences between neutral lactase and acidic lactase lie in their functional pH environments and application scenarios. Neutral lactase's activity is compatible with the neutral environment of the human small intestine, does not require activation by gastric acid, is suitable for a wider range of people, and is more convenient for room-temperature food processing. Acidic lactase, however, needs an acidic environment to function, relies on gastric acid for activation, and is more suitable for the digestive scenario in adults' stomachs. The two are clearly distinguished in terms of functional conditions, applicable populations, and usage scenarios.