jan 1, 1980 - 9th edition Recommended Dietary Allowances (RDAs) published

Description:

"The subcommittee that prepared the ninth edition of the RDAs created the category “Safe and Adequate Intakes” for nutrients with data bases insufficient for developing an RDA, but for which potentially toxic upper levels were known. In this category were three vitamins (vitamin K, biotin, and pantothenic acid), six trace elements (copper, chromium, fluoride, manganese, molybdenum, and selenium), and three electrolytes (sodium, potassium, and chloride). "1

Source:
1. National Research Council (US) Subcommittee on the Tenth Edition of the Recommended Dietary Allowances. Recommended Dietary Allowances: 10th Edition. Washington (DC): National Academies Press (US); 1989. 2, Definition and Applications. Available from: https://www.ncbi.nlm.nih.gov/books/NBK234926/
2. Recommended Dietary Allowances — 1980, Nutrition Reviews, Volume 38, Issue 8, August 1980, Pages 290–294, https://doi.org/10.1111/j.1753-4887.1980.tb05965.x

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