10: Protein
- Page ID
- 157537
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- 10.1: Introduction to Protein
- This page discusses the vital role of proteins, making up around 20% of the human body, and their importance in functions like muscle movement and immune support. It covers essential and nonessential amino acids, the consequences of protein imbalance, and the best food sources for protein, including the idea of complementary proteins, highlighting the crucial role of protein in health and bodily functions.
- 10.2: What is Protein?
- This page explains that proteins are macromolecules composed of amino acids, crucial for nourishment, renewal, and sustaining life. Unlike carbohydrates and lipids, proteins contain nitrogen, setting them apart from other macronutrients while also having carbon, hydrogen, and oxygen.
- 10.3: Sources of Protein
- This page discusses the protein food group, covering sources like meat, seafood, poultry, eggs, soy, beans, nuts, and seeds. It highlights the nutrient differences between animal and plant proteins, the importance of essential amino acids, and the distinction between complete and incomplete proteins. Complete proteins contain all nine essential amino acids, while incomplete proteins can be combined to achieve this.
- 10.4: Important Roles of Protein in the Body
- This page discusses the vital roles of proteins in the body, including their functions as structural components, enzymes, hormones, and transporters. It highlights collagen as the most abundant protein, contributing to the strength and flexibility of various tissues. Proteins are crucial for regulating fluid and pH balance, aiding in wound healing, facilitation of chemical reactions, and providing immune protection. They also serve as a potential energy source when required.
- 10.5: Why You Should Eat Protein
- This page discusses the serious impact of protein deficiency in children under five in impoverished countries, highlighting the disease kwashiorkor. It emphasizes the importance of maintaining a balanced protein intake, recommending that 10-35% of daily calories come from protein and adults require about 0.8 grams per kilogram of body weight.
- 10.6: What about vegetarians and vegans
- This page discusses the impact of vegetarian and vegan diets on protein intake and associated risks, highlighting different vegetarian categories like Lacto, Lacto-Ovo, and pescatarians. It emphasizes the need for a varied diet to obtain essential nutrients, especially vitamin B12. Despite challenges, a balanced vegetarian diet can reduce chronic disease risk and provide health benefits, including lower cancer rates, fewer digestive problems, and better heart health.
- 10.7: Athletes and Protein intake
- This page outlines that athletes, regardless of diet type (omnivorous, vegetarian, or vegan), should aim for a protein intake of 1.2-2.0 g/kg/day to support muscle repair and turnover. It also suggests consulting GSSI's website for more detailed information on protein needs related to athletic training and performance.
- 10.8: End Chapter
- This page discusses protein's dietary significance, including its bodily functions, how to assess individual protein requirements, and the distinctions between animal and plant protein sources. It clarifies concepts like complete proteins and the types of amino acids, while also highlighting potential health issues related to both excessive and inadequate protein consumption.