Problem: John is lactose intolerant and adds a lactase enzyme tablet to cold beverages when consuming dairy products. Last night, John decided to make a cup of hot cocoa and added a lactase tablet to the hot beverage. After consuming the cocoa, John experience a reaction to the beverage indicating it contained lactose when consumed.
Apply your knowledge of enzymes, temperature, pH, and specificity to explain to John why the lactase pill added to the beverage did not function and how he could enjoy this dairy treat in the future.