Nutrition Basics and Terminology By Jennifer Turley and Joan Thompson © 2013 Cengage

Presentation Overview 1.Terminology 2.Introduction Nutrients & Calories 3.Characteristics of a sound diet 4.Results of a sound diet 5.Health & Malnutrition 6.Factors affecting longevity & food choices

Terminology Diet: The kind and amount of food consumed each day. Food: Anything that nourishes the body. Nourish: To keep alive.

Terminology Nutrition: The study of how food keeps us alive. –Includes the ingestion, digestion, absorption, assimilation, and excretion of food. Nutritional Sciences: The study of nutrition including dietary components and metabolism.

Nutrient: Molecular substances that are nourishing or that provide nourishment to cells and thus every multicellular component of the human organism. Essential: The body cannot make these nutrients, they must be consumed. Without an intake, specific deficiency signs and symptom occur. Nonessential: The body can make these nutrients. Without an intake, nutritional deficiency signs and symptom do not occur. Energy Producing: Produces Calories when metabolized by the body. Non-Energy Producing: Do not provide Calories but have other important functions. Terminology

Molecules to Cells to Organisms in the Order of Life

Overview of the Nutrients * Some B vitamins contain Nitrogen

The Six Categories of Nutrients Can be divided into two categories: Energy Producing Nutrients (Macronutrients) –Carbohydrates, Fats and Proteins Essential Non-caloric Nutrients –Vitamins & Minerals (Micronutrients) –Water Energy producing nutrients provide Calories

The Kilocalorie (Calorie): –The unit used to measure energy. –It is the amount of heat energy required to raise one kilogram of water one degree Celsius (C) from 36 o -37 o C (actually a kilocalorie, Kcal or Calorie denoted with a capitol “C”). Terminology

Energy Producing Nutrients * Fiber is a non-caloric carbohydrate

The Kilocalorie (Calorie)  How do we apply this definition to the energy applied to food?  By using a Bomb Calorimeter.

Bomb Calorimeter

Energy Production in the Body The ultimate fuel used in the body is a chemical called ATP ATP = Adenosine Tri-Phosphate We capture the chemical energy between the carbon-carbon bonds in Carbohydrate, Fat and Protein to form ATP

Nicknames: Energy Producing Nutrients Carbohydrates are the High Performance Fuel –Carbs are fast and best at making ATP Fats are the Low Level Fuel –Fats are very slow to produce ATP Proteins are the building blocks for growth and repair –Only under intense stress does protein provide ATP –Loads of toxic waste is produced when protein is over consumed

The Non-caloric Nutrients What does non-caloric mean? No ability to generate ATP No Calorie value Some non-caloric nutrients can be essential for the body Physiological failure or death occurs if the nutrient is withheld from the diet

The Goal of Eating

Food keeps us alive by providing Calories (energy) and Nutrients. The relationship between Calories and Nutrients is called: Nutrient Density: Refers to the amount of nutrients provided relative to the number of Calories. Foods with high nutrient density are nutritious. Terminology

Nutrient Density Values shown are % DRI for a moderately active adult woman 1 Large Potato vs 1 Small Order Fast Food Fries, both 210 Calories

Nutrient Density 1 cup plain yogurt vs ½ cup vanilla ice cream, both 130 Calories

Nutrient Density

Characteristics of a Sound Diet Calorie Control: An appropriate amount of Calories are eaten to maintain a healthy body weight. Adequacy: Essential nutrients, fiber, and energy (Calories) are present in the diet. Balance: Food types complement one another in the diet. Not any one nutrient or food type is overbearing. Moderation: The diet does not contain an excess of unwanted substances. Variety: Different foods are used for the same purpose in the diet.

Diet Results Result of a sound diet: –Health: The state of complete physical, mental, and social well-being; not just the absence of infirmity. Result of a poor diet: –Malnutrition: Impairment of health resulting from deficiency, toxicity, or imbalance of nutrient intake or body utilization (includes over-nutrition and under-nutrition).

Health Philosophical Statement about Health Healthy lifestyle behaviors promote health, & unhealthy lifestyle behaviors promote disease. Over long periods of time the health consequences can be realized. Therefore, even though a person may be “disease-free” at the moment, a person that lives an unhealthy lifestyle should not be labeled as a “healthy” person.

Factors Affecting Longevity 1. Diet Poor diets promote degenerative diseases/conditions: such as, cancer, heart disease, osteoporosis, diabetes, & obesity. Dietary factors like Fat, Sugar, Fiber, Sodium, Alcohol, & Calcium, function in the disease process.

Leading Causes of Death Diet Related Non-Diet Related Alcohol Related Deaths per 100,000

Factors Affecting Longevity 2. Exercise ( physical activity) Promotes health by positively influencing body weight/composition, metabolism, bone density, cognitive function, blood pressure, blood cholesterol, and the cardiovascular system. Strive for 60 minutes each day.

Factors Affecting Longevity 3. Other Factors Smoking or tobacco use is a leading contributor to death of Americans Habits (lack of sleep, alcohol & drug use, unsafe sex) Chance (accidents) Genetics

Factors Affecting Food Choices 1.Hunger: The Physiological need for food. The physical body sends signals indicating a need for food. 2.Satiety: The Physiological feedback mechanisms that terminate food intake. 3.Appetite: The Psychological desire for food. The brain sends signals indicating a desire for food because of sensory input like seeing, smelling, or thinking about food.

Factors Affecting Hunger, Appetite and Satiety

Factors Affecting Food Choices 4. Personal Preferences: The food likes and dislikes of an individual. 5. Availability: Food supply, geographical area, climate, soil. 6. Economics: Social status and income. 7. Social Factors: Family, friends, holidays, celebrations, etc. 8. Cultural Traditions: Beliefs, values, customs. 9. Advertising: TV, radio, magazines, newspaper. 10. Other: Habits, feelings, knowledge, etc.

Summary Diet is the collection of food consumed by an individual within a 24 hour period. Food nourishes the body, it contains nutrients that can be essential, nonessential, caloric, or non-caloric. Nutrition is the study of how food nourishes and affects body function throughout the day and health over several years. The goal of eating should be to fuel and nourish the body optimally.

Summary It is important to consume a healthy diet in order to promote health and prevent chronic disease. There are many factors affecting food choice. References for this presentation are the same as those for this topic found in module 1 of the textbook