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Carrots in Space: Fresh Food for Astronauts on Its Way

New research indicates that astronauts will soon have their own gardens aboard the International Space Station with the ability to grow vitamin A-rich carrots in space, according to a study in the Journal of Food Science, published by the Institute of Food Technologists.

Researchers from Tuskegee University in Alabama conducted a study targeted at finding a way to incorporate natural and fresh antioxidants into the diets of astronauts while traveling in space. They grew 18 different varieties of hydroponic carrots using two different methods of nutrient delivery. Growing carrots hydroponically cultivates the vegetables by placing the roots in liquid nutrient solutions rather than in soil.

Among all foods, carrots have the highest carotenoid content. They also contain a natural pigment known for provitamin A and have been associated with protection against cancer, cardiovascular diseases, cataracts and macular degeneration as well as enhancing the immune response. Astronauts can be exposed to elevated levels of radiation, which might put them at risk for some types of cancer. Researchers believe that the addition of unprocessed carrots to their diets may help reduce the negative effects of radiation and cancer development.

The hydroponically grown carrots were issued nutrients in two different methods. One method is the nutrient film technique (NFT), in which the roots were exposed to a nutrient solution within a plastic film trough. The second method is the microporous tube membrane system (MTMS), in which nutrient tubes were embedded into Turface—a material similar to crushed clay— where the carrots were planted.

All carrots were harvested 70 days after planting. They were tested for moisture, fat and carotene content as well as color and texture. Consumer testing also occurred to test the acceptability of the hydroponic carrots. This group evaluated color, crunchiness, sweetness, fibrousness, blandness and overall preference of the 18 different carrot types grown using NFT and MTMS.

The study concluded that hydroponic carrots grown using the MTMS method were most appealing to consumers due to their color and more carrot-like appearance. Moisture contents were similar among all hydroponic carrots as was the carotene content. Lead researcher A.C. Bovell-Benjamin stated, “The Nevis-F carrot cultivar grown using the NFT method had the highest carotenoid content and acceptability among consumers, and therefore, it will be the most likely choice for inclusion in NASA’s food system.”

To receive a copy of the study, please contact Jeannie Houchins at

About IFT
The Institute of Food Technologists (IFT) exists to advance the science of food. Our long-range vision is to ensure a safe and abundant food supply contributing to healthier people everywhere. Founded in 1939, IFT is a nonprofit scientific society with 20,000 individual members working in food science, food technology, and related professions in industry, academia, and government. IFT champions the use of sound science across the food value chain through knowledge sharing, education, and advocacy, encouraging the exchange of information, providing both formal and informal educational opportunities, and furthering the advancement of the profession. IFT has offices in Chicago, Illinois, and Washington, D.C. For additional information, please visit

© 2009 Institute of Food Technologists

Jeannie Houchins | Newswise Science News
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