CNN Vital Signs with Dr. Sanjay Gupta May 30, 2015 18:50:00
Diets. >> is it more focused on health or more focused on tasting good and providing some comforts of home? >> so that's a delicate balance. we actually really strive to do both. so there are many items that we've had on the menu that were great tasting items, but recently we've had a big sodium reduction. >> reporter: astronauts consume some 3,000 calories a day. that takes into account two hours a day of exercise. it's also because time spent in weightlessness requires more energy. your body is never truly at rest. >> so we have better data in terms of how food actually impacts the body than...
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