Are all Swiss cheeses lactose free?

Not all Swiss cheeses are lactose-free, but many varieties, such as Emmental and Gruyère, are low in lactose due to the fermentation and aging processes they undergo. During aging, lactose is broken down by bacteria, resulting in lower lactose content. However, individuals with lactose intolerance may still react to small amounts, so it's important for them to choose aged cheeses or consult with a healthcare professional. Always check labels or product information for specific lactose content.