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whether it's losing weight or just

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making better choices we all get that

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first of the year boost when it comes to

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nutrition and getting healthy but for

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astronauts on the international space

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station it's a daily routine they have

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to think about everything they eat and

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how it will affect their overall health

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so we study nutrition in space and the

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things we're learning from these

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astronaut studies are shedding light on

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problems we face here on earth such as

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vision bone loss and vitamin d

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deficiencies what we're doing is trying

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to evaluate nutrition and basic

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physiology if you will

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in astronauts while they're on space

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station

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and it's very similar to

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when you go to the doctor and you get a

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checkup

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they'll draw a blood sample they'll

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collect the urine sample

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and we'll look at things in there to see

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how you're doing

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that's in essence what we're doing with

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it with a cruise we collect blood and

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urine samples during space flight

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over the course of a six-month mission

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we collect five blood samples and five

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urine samples

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and we measure

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a whole host of things in those samples

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to look at

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vitamin status and mineral status

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we look at things like bone metabolism

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we look at some muscle markers some

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oxidative damage markers

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you name it there's a lot of a lot of

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biochemistry in that blood urine that

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can tell us how your body's doing

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in our case during space flight

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we're looking at different chemicals

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that

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have helped us better understand some of

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the the medical issues that occur during

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spaceflight

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and the most significant one of those is

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we found

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crew members coming back from space

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station with vision problems

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crew members that went up with perfect

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vision and came home needing glasses

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in the in its simplest explanation and

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what we found in data from uh blood

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samples is that there are differences in

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the biochemical profiles of crew members

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that had vision issues compared to those

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that did not

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and were working to follow up on that to

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try to help better understand

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the vision changes during flight

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the research they were doing in flight

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from from two perspectives um has a lot

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to do with people on earth

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just understanding basic physiology uh

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basic nutritional requirements um can

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help us better understand

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those same things on earth the bone loss

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that we see during space flight is very

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similar to some bone diseases that

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people on earth get

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and we're studying them in a very

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healthy population so

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that helps us better understand

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the nature of those diseases and then on

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the other hand as we develop means to

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help counteract those diseases or those

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issues during space flight

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those two have direct application uh for

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people on earth be it dietary changes

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that can help mitigate bone loss during

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flight

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one of the things is that you know we

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did some studies

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to help better understand how much

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vitamin d people needed during space

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flight

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and we've now got a point where where

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we're maintaining vitamin d levels in

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our astronauts those data were actually

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incorporated in the group the the

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institute of medicine who sets the

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recommended dietary allowances the rdas

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for the population

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our study was one of the many studies

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that those groups looked at to help

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better understand

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vitamin d requirements for people on

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earth so

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there's a there's a lot of interaction

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but again

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um

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it it overlaps

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entirely we still have a lot of work to

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do based on the many findings that we've

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gotten out of our first nutrition study

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we've actually evolved that into a

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follow-on study what we're calling the

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biochemical profile experiment where

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again we're collecting

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blood and urine samples to look at the

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adaptation of space flight

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we're also starting up

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some

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what we call the integrated nutrition

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study where we're looking to modify

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people's diets to provide healthier

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diets to see if we can use those as ways

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to mitigate some of the negative effects

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of space flight on the human body

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and those are in the very early stages

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but hopefully

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in a few years i'll be back talking