Eating in Zero-G: Microgravity’s Impact on Taste, Chewing, and Hydration

Spaceflight shifts body fluids toward the head and dulls taste/smell, making eating and drinking in orbit less satisfying and potentially reducing food intake. Swallowing itself doesn’t require gravity, but microgravity alters saliva production and oral conditions, contributing to dry mouth and swallowing difficulties. These changes can affect nutrition and hydration on long missions, such as a Mars voyage, prompting research into texture-modified foods and 3D-printed meals to tailor nutrition and ease swallowing for astronauts.