MONDAY, Dec. 26, 2022 (HealthDay News) — Diets higher in fruit, vegetables and omega-3 fatty acids could improve astronaut health during long spaceflights while still sticking to requirements for what can go on board, according to new research. A new study tested this theory on a spaceflight simulation chamber on Earth with 16 people: 10 men and six women. Four individuals participated in each 45-day, Earth-based, closed-chamber mission. They either ate a standard astronaut diet or one that was enhanced with more fruits and vegetables, along with more fish and other sources of omega-3 fatty acids. While the standard spaceflight diet is currently used on the International Space Station, the…