Scientists Develop 3D-Printed Foods for 2- to 3-Year Mars Missions

2 articles · Updated · Scientific American · Aug 9

3D-printed foods are being designed to help astronauts eat safely and maintain nutrition on long missions, with textures that could be tailored for chewing or swallowing difficulties.
Microgravity drives the need: fluids shift toward the head, causing congestion, dulled smell and pressure changes that can make food less appealing and swallowing more complicated.
Researchers say spaceflight may also alter saliva production and oral health through dehydration, stress responses and fluid shifts, raising risks for dry mouth, dental problems and discomfort.
Astronauts already tend to eat less than expected and lose weight in orbit, a concern because nutrition supports muscle strength, immunity and mental performance.
A Mars round trip could last 2 to 3 years without easy medical support, making reliable, customizable food systems a small but important factor in mission success.