The Science Behind Lactose-Free Cheese
Cheese is made from milk, which contains the milk sugar lactose. Lactose is composed of two simple sugars – glucose and galactose. However, during the cheese-making process, the lactose is transformed into lactic acid by the bacteria used to ferment the milk. This means that aged cheese has very little lactose left in it. Lactic acid is what gives aged cheese its tangy and sharp taste. The longer a cheese is aged, the more the lactose is broken down into lactic acid resulting in almost lactose-free cheese.Key Factors That Affect Cheese Aging Time
Cheese aging time can vary based on several factors such as the type of cheese, the cheese-maker’s preferences, and the storage conditions. The amount of moisture in the cheese also affects how quickly the lactose breaks down. The bacteria used to ferment the cheese can also impact the aging process. For example, some bacteria strains produce more lactic acid, which leads to faster lactose breakdown. Other key factors that affect cheese aging time include temperature and humidity. Aged cheese is usually stored in a cool, dark environment, where the temperature and humidity remain constant. The ideal temperature range for cheese storage is around 50 to 55 degrees Fahrenheit. High humidity can cause mold to grow on the cheese, while low humidity can dry it out, causing it to become brittle.Cheese Variety and Its Role in Aging Time
Different types of cheese have different aging times. Soft cheeses like brie typically age for two to three weeks and have higher lactose content than hard aged cheese. Owing to this, they may not be suitable for lactose-intolerant people. Hard cheese like cheddar, parmesan, and gouda can take up to several years to age. These cheese varieties have a lower lactose content, making them ideal for lactose-intolerant individuals. Did you know? Some cheese-makers inject lactase into the milk to break down the lactose before starting the cheese-making process, making the cheese lactose-free from the start. This is a good alternative to aged cheese for people with severe lactose intolerance.The Minimum Age Required for Lactose-Free Cheese
While the lactose content of cheese decreases as it ages, not all aged cheeses are lactose-free. The minimum age required for cheese to be lactose-free is two months. This time frame allows enough time for the bacteria to break down the lactose and for most of it to be converted into lactic acid. However, some individuals with severe lactose intolerance still may not be able to tolerate these aged cheeses. Pro Tip: Check the labels of the cheese to know the age. Most aged cheese labels will indicate the age of the cheese.Aging Techniques to Make Cheese Lactose-Free
Cheese-makers can use several techniques to make lactose-free cheese. Here are three techniques:- Accelerated aging – This technique involves manipulating temperature and humidity to accelerate the aging process and achieve lactose-free cheese faster.
- Adding lactase enzyme – Adding lactase enzyme breaks down the lactose in the milk before reaching the cheese-making process. This results in lactose-free cheese from the start.
- Natural fermentation – This technique involves allowing the cheese to age naturally, giving the bacteria time to break down the lactose into lactic acid. This process takes time, but it yields the most authentic cheese flavor and texture.