What is the main action that needs to be prevented to avoid beer skunking?

To prevent beer skunking, the primary action that must be avoided is exposure to sunlight and fluorescent light. Beer skunking occurs due to a chemical reaction that happens when certain compounds in beer, particularly hops, are exposed to light, especially UV light. This reaction leads to the formation of undesirable compounds that create off-flavors, often described as “skunky,” which can significantly detract from the beer's quality and flavor profile.

Packaging beer in brown bottles or cans can help block out harmful light and protect the beer from this skunking effect. Clear or green bottles offer less protection, thus increasing the risk of skunking when they are exposed to light for prolonged periods. Proper storage in a dark environment is also crucial for maintaining beer quality and preventing this undesired phenomenon. Understanding the impact of light on beer is essential for both brewers and consumers to ensure the best possible experience when enjoying a beer.