NASA has long included M&M's candy as a standard part of the food menu for astronauts aboard the International Space Station. The candies are chosen not only for their taste but for practical reasons: their hard shell minimizes crumb production in microgravity, and their bright colors and familiar taste provide a psychological boost during long missions.
The inclusion of comfort foods like candy is a recognized part of spaceflight nutrition psychology. According to NASA's Human Research Program, maintaining crew morale through familiar foods is critical for mission success on extended stays in orbit. M&M's are often used in pre-launch and training traditions as well.
While various snacks rotate on resupply missions, M&M's have remained a consistent favorite. Their packaging is modified for space use, often repackaged in vacuum-sealed bags to prevent floating and to save space. This detail highlights the extensive planning behind even the smallest aspects of life in space.