protein intake
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Central representations of protein availability regulating appetite and body weight control
Dietary protein quantity and quality greatly impact metabolic health via evolutionary-conserved mechanisms that ensure avoidance of amino acid imbalanced food sources, promote hyperphagia when dietary protein density is low, and conversely produce satiety when dietary protein density is high. Growing evidence support the emerging concept of protein homeostasis in mammals, where protein intake is maintained within a tight range independently of energy intake to reach a target protein intake. The behavioural and neuroendocrine mechanisms underlying these adaptations are unclear and form the focus of our research.
Towards resolving the Protein Paradox in longevity and late-life health
Reducing protein intake (and that of key amino acids) extends lifespan, especially during mid-life and early late-life. Yet, due to a powerful protein appetite, reducing protein in the diet leads to increased food intake, promoting obesity – which shortens lifespan. That is the protein paradox. In the talk I will bring together pieces of the jigsaw, including: specific nutrient appetites, protein leverage, macronutrient interactions on appetite and ageing, the role of branched-chain amino acids and FGF-21, and then I will conclude by showing how these pieces fit together and play out in the modern industrialised food environment to result in the global pandemic of obesity and metabolic disease.
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