Innovative Nutrition in Space: Purple Kefir on the ISS
Astronauts on the International Space Station (ISS) are taking nutrition to new heights. This September, crew members are preparing purple kefir, a fermented milk beverage, to enhance their vitamin intake during their mission from Sept. 8-12, 2025. The unique color and composition of this kefir aren’t just for show—they’re designed to deliver essential vitamins and nutrients that astronauts need to stay healthy in the challenging environment of space.
Why Purple Kefir Matters for Space Exploration
Maintaining proper nutrition is a top priority for space agencies. Fermented foods like kefir provide probiotics and vitamins that support the immune system and digestive health. The purple variant may include added antioxidants or nutrients, making it even more beneficial for astronauts exposed to the stress of microgravity and cosmic radiation.
The phrase, “Science for exploration, one [fermented milk] bag at a time,” highlights how small innovations contribute to big advances in space travel. Experimenting with foods like purple kefir could pave the way for longer missions and healthier crews.
