1/15/2018 1 Optimizing Protein … … in a Carbohydrate World Donald K. Layman, Ph.D. Professor Emeritus Department of Food Science & Human Nutrition University of Illinois at Urbana‐Champaign The confused consumer … Myth: “Adults eat more protein than they need”
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Final Donald Layman NSP Webinar PPT 01-15-18 · Branched‐chain amino acids BCAAs Metabolic signals from amino acids amino acids Neurotransmitters (mood, appetite) gut hormones (GLP1,
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1/15/2018
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OptimizingProtein…… inaCarbohydrateWorld
Donald K. Layman, Ph.D.
Professor Emeritus
Department of Food Science & Human Nutrition
University of Illinois at Urbana‐Champaign
Theconfusedconsumer…
Myth: “Adults eat more protein than they need”
1/15/2018
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Recommended Dietary Allowance (RDA)The lowest level of dietary protein intake that will balance the losses of nitrogen from the body … in persons at energy balance with modest levels of physical activity …
Myth: “Adults eat more protein than they need”
Minimum intake to prevent deficiencies
versus
Optimum intake for health
DietaryReferenceIntake
AcceptableMacronutrientDistributionRange
RDA = Recommended Dietary Allowance
SafeRangeofDietaryProtein(DRI)
DietaryReferenceIntake(forprotein)
AcceptableMacronutrientDistributionRange
0.8g/kg~56g/d10%En
>3.0g/kg~225g/d35%En
P P
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Theparadigmshift… from Pyramids to Plates
• avoid fat• eat grains• daily net servings
• vegetables• protein (and dairy)• balanced meals
2010
What’s new in protein research:
health of skeletal muscle critical for long‐term health
age‐related “sacropenia”
• functional mobility
• metabolic health
aging reduces efficiency of protein use
meal distribution of protein
A “Muscle‐centric” View of Nutrition
Am J Clin Nutr 2006; 84:475
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Metabolic Advantage of Protein(with reduced carbohydrate intakes)
improves body composition protects skeletal muscle; targets fat loss
increases metabolic rate enhances satiety
reduces snacking
reverses the Metabolic Syndrome↓ TG, ↑ HDL, ↑ LDL size↓ FBG, ↓ post‐prandial insulin, ↓ BP
Minimum versus Optimum? what are the critical health outcomes?
Growth versus Aging
Protein RDA = 2.2 1.5 1.0 0.8 ……………………………………….. g/kg?