6: Proteins
- Page ID
- 21133
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- 6.1: Introduction to Proteins
- This page details the structure and importance of proteins, highlighting their composition of amino acids. It distinguishes between essential amino acids, obtained through diet, and nonessential ones, which the body can produce. The synthesis of proteins involves amino acids linked by peptide bonds, controlled by genetic information. Additionally, it covers denaturation of proteins and the idea of limiting amino acids affecting protein synthesis.
- 6.2: Digestion and Absorption of Proteins
- This page covers the digestion and absorption of proteins in the body, detailing the mechanical and chemical breakdown in the mouth and stomach, followed by intestinal digestion aided by pancreatic enzymes. It emphasizes the liver's role in amino acid distribution and recycling, supporting new protein synthesis and maintaining bodily balance.
- 6.3: Functions of Protein
- This page highlights the vital functions of proteins in the body, including tissue building, enzyme activity, hormone regulation, nutrient transport, immune response, and wound healing. It emphasizes the process of deamination for protein energy use and the necessity of adequate carbohydrate and fat intake to preserve protein for structural roles.
- 6.4: Protein Recommendations
- This page outlines protein requirements, detailing the RDA of 0.8 grams per kilogram of body weight and an AMDR of 10-35% of total calories. It explains nitrogen balance in relation to protein intake and excretion and categorizes protein sources into complete and incomplete types. The page also mentions mutual supplementation and encourages a diverse intake of protein foods for optimal nutrition.
- 6.5: Diseases Involving Proteins
- This page discusses the health implications of both low and high protein intakes, emphasizing the importance of moderation. It outlines the severe consequences of protein deficiency, such as Kwashiorkor and Marasmus, especially in children in underdeveloped countries. Symptoms include swelling and muscle wasting for Kwashiorkor, and significant weight loss for Marasmus.
- 6.6: Vegetarian and Vegan Diets
- This page provides an overview of vegetarian and vegan diets, focusing on protein intake and various types, including semi-vegetarian and vegan. It examines motivations for these diets, such as ethical and health reasons, while noting potential nutrient deficiencies, especially for vegans. It emphasizes the importance of proper planning to achieve nutritional adequacy and avoid risks associated with inadequate intake of key vitamins and minerals.