Why do coffee beans need to be protected from light?

Coffee beans are one of the most popular drinks in our daily life. They have a strong aroma and unique taste. However, you may find that when you buy coffee beans, merchants usually put them in light-proof packaging. So why do coffee beans need to be protected from light?

First of all, we need to understand that coffee beans contain many sensitive substances, the most important of which is caffeine. When coffee beans are exposed to sunlight, ultraviolet rays will destroy the chemical structure and accelerate the oxidation reaction. This will not only cause the caffeine to decompose and become ineffective, but may also produce adverse changes such as bitter substances and increased acidity.

Secondly, too long exposure to sunlight will also cause coffee beans to lose their original rich and complex aroma. The visible light and ultraviolet light in the sun can cause many organic substances to break intermolecular bonds, generate free radicals, and further lead to the loss of flavor substances.

In addition, it is also very important to maintain proper humidity during storage. The moisture content in coffee beans will be affected by humidity. Too high or too low humidity will cause the quality of coffee beans to deteriorate. Therefore, light-proof packaging can usually also provide a certain degree of moisture-proof effect.

In summary, in order to maintain the original flavor and quality of coffee beans, it is very necessary to avoid light. Choosing sealed, opaque and moisture-proof packaging when purchasing is the key to ensuring the freshness of coffee beans and the perfect taste.