Food Systems for Food Security On-Farm Supply Issues Hans H. Stein University of Illinois .
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Transcript of Food Systems for Food Security On-Farm Supply Issues Hans H. Stein University of Illinois .
Food Systems for Food Security
On-Farm Supply Issues
Hans H. SteinUniversity of Illinois
http://nutrition.ansci.illinois.edu
Current Research
• Energy and nutrient digestibility in pigs– Amino Acids– Minerals– Lipids– Carbohydrates (starch and fiber)
• Use of pigs as models for humans – Amino acids– Energy and fiber
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Ileal AA Digestibility
Amino Acid Nutrition in Humans
H. H. Stein
Human Malnutrition• Marasmus– Energy and protein deficiency
• Kwashiorkior– Deficiency of protein (quality or quantity)
• Goiter– Iodine deficiency
• Anemia– Deficiency of iron, vit. B12, or folic acid
Kwashiorkor
Preparation of Casava
H. H. Stein
Nutritional Value of Casava
Kwashiorkor
Protein Requirements
• Is a requirement for indispensable AA• AA are needed for maintenance, growth, and
milk protein synthesis• Greatest requirement (as % of diet) in children,
teenagers, and pregnant and lactating women• No storage of excess AA – needed every day
Liebig’s Barrel
AA intake of 8 year old boy
H. H. Stein
100 g rice + 55 g beans
AA intake of 8 year old boy - 100 g rice + 55 g soy flour
H. H. Stein
H. H. Stein
Digestible Indispensable Amino Acids Scores (DIAAS)
H. H. Stein
DIAAS values indicate the first limiting AA in Food Proteins
First Peer Reviewed Publication
First Peer Reviewed Publication
H. H. Stein
Cervantes-Pahm et al., 2014
DIAAS in Cereal Grains (> 3 years)
H. H. Stein
Unpublished, Univ. IL, 2014
DIAAS in Soy Proteins (> 3 years)
Current and Future Research
• DIAAS values in 4 dairy proteins and 4 plant proteins (Ongoing)
• Future: DIAAS values in 100 food proteins (in collaboration with 3 other Universities)
• Further refinement of systems for AA evaluation in humans
H. H. Stein
Acknowledgement
http://nutrition.ansci.illinois.edu