Which factor commonly affects the shelf life of food products?

Humidity plays a significant role in determining the shelf life of food products because it directly affects moisture content, which can lead to spoilage or quality degradation. High humidity can promote the growth of mold and bacteria in certain foods, particularly in grains, dried fruits, and baked goods. In contrast, low humidity can lead to products becoming stale or losing moisture, which can also affect texture and taste. Therefore, controlling humidity levels in storage conditions is crucial for maintaining the freshness and safety of food items.

Other factors, while important in the broader context of food marketing and consumer preferences, do not directly influence the chemical stability and biological integrity of the food in the same immediate way that humidity does. For instance, social trends, color of packaging, and marketing campaigns may attract consumers and influence purchasing decisions, but they do not alter the inherent shelf life characteristics of the food itself.