The Effects of Quitting Coffee and Milk for a Month: Expert Insights

According to Peter Giuliano, Chief Research Officer at the Specialty Coffee Association, coffee is best consumed within two weeks of being roasted as it degrades quickly after that. By three months, coffee is considered fully stale. The loss of quality in coffee is due to de-gassing and the growth of undesirable compounds. Oxygen is the enemy of coffee beans, so bags of coffee feature a small valve hole to allow carbon dioxide to escape while preventing oxygen from entering. Leaving coffee in the bag helps maintain its freshness, but it should not be left for too long.