Nutritional models for space travel from chemically defined diets
1984
Dufour, Patricia A.
Human nutritional requirements are summarized, including recommended daily intake and maximum safe chronic intake of nutrients. The biomedical literature on various types of chemically defined diets (CDD's), which are liquid, formulated diets for enteral and total parenteral nutrition, is reviewed. The chemical forms of the nutrients in CDD's are detailed, and the compositions and sources of representative commercial CDD's are tabulated. Reported effects of CDD's in medical patients, healthy volunteers, and laboratory animals are discussed. The effects include gastrointestinal side effects, metabolic imbalances, nutrient deficiencies and excesses, and psychological problems. Dietary factors contributing to the side effects are examined. Certain human nutrient requirements have been specified more precisely as a result of long-term use of CDD's, and related studies are included. CDD's are the most restricted yet nutritionally complete diets available. Very long space missions may have severe limitations on the number and types of food sources. Data on CDD's may be useful to the CELSS (Controlled Ecological Life Support Systems) Program in the design of diets for future space missions of long duration.
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Bibliographic information
Publisher National Aeronautics and Space Administration, Scientific and Technical Information Branch | [Springfield, Va.] : National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1984
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