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Essential Amino Acids in Self-Selected Diets of Older Women¹

Agricultural Experiment Stations of Indiana, Michigan, Iowa and Missouri

With the use of microbiological methods, the average daily intakes of 7 essential amino acids were determined for 18 older women on self-selected diets. The levels of intake of isoleucine, leucine, lysine, threonine, and valine usually equaled or exceeded the recommended levels of Rose, whereas phenylalanine was intermediate and methionine intake seldom reached the recommended levels and in many cases was below the minimum level. Methionine appears to be the first limiting essential amino acid in the self-selected diets studied.

² Journal paper 554, Purdue Agricultural Experiment Station, Agricultural Chemistry Department, Lafayette, Ind.

³ See footnote 2.

⁴ Journal paper 1271, Michigan Agricultural Experiment Station, Foods and Nutrition Department, E. Lansing.

⁵ Journal paper J-1971, Iowa Agricultural Experiment Station, Foods and Nutrition Department, Ames. Project No. 1028.

⁶ Journal paper 1264, Missouri Agricultural Experiment Station, Foods and Nutrition Department, Columbia.

Manuscript received 9 August 1951.