Nutrition: The Basics

Overview of Nutrition and Its Importance
- Nutrition is the scientific study of nutrients and how the body uses them.
- Key to understanding nutrition is learning about chemistry and physiology.
Learning Outcomes
- Importance of learning about foods and nutrition.
- Factors influencing personal food choices.
- Leading causes of death in the U.S. and related lifestyle factors.
- Six classes of nutrients and their major roles in the body.
- Distinction between nutrients, essential nutrients, nonnutrients, and phytochemicals.
Importance of Food Choices
- Food choices significantly affect health and lifestyle.
- Transition from parental control to personal choice in food as one grows older.
- Influences on food choices include cultural background, peer influence, economic status, and advertising.
- Emotional connections and social significance of food (e.g., celebrations, comfort).

Health Equity vs. Health Equality
- Health Equality: Same resources and opportunities for all people.
- Health Equity: Addresses barriers to health caused by social determinants of health (SDOH).
- SDOH impact access to safe housing, education, and healthcare, contributing to chronic diseases in some populations.
- Importance of creating equitable opportunities for health across all demographics.
Impact of Diet on Health
- Poor diet contributes significantly to leading causes of death in the U.S.
- Key lifestyle-related diseases: heart disease, cancer, diabetes.
- Healthy diets are linked to better immune responses and reduced risk of premature death.
Personal Responsibility in Nutrition
- Engagement in nutrition education leads to informed food choices.
- No guaranteed way to optimal health, but understanding nutrients can aid personal dietary decisions.

Classes of Nutrients
- Six primary classes: carbohydrates, fats, proteins, vitamins, minerals, water.
- Nutrients serve various functions, including energy provision, growth, regulatory processes, and cellular maintenance.
Metabolism Overview
- Metabolism involves all chemical processes in living cells for energy generation, make proteins, and waste elimination.
- The smallest living functional unit is the cell, requiring nutrients for metabolic activities.
Essential Nutrients
- Essential nutrients must be acquired through diet; body cannot synthesize them in sufficient amounts.
- Key features of essential nutrients:
  - Deficiency leads to specific health problems.
  - Adding the nutrient to a diet alleviates the deficiency.
  - Nutrient roles can be identified scientifically.

Symptoms and Correction of Nutrient Deficiencies
- Deficiency diseases linked to absence of essential nutrients (e.g., vitamin C leading to scurvy).
- Signs and symptoms of deficiencies can be corrected with proper intake of missing nutrients.
List of Essential Nutrients
- Essential nutrients include water, certain vitamins, minerals, and amino acids.
- Key for optimal functioning and overall health.
Nonnutrients and Phytochemicals
- Phytochemicals - plant-based compounds that may have health benefits.
- Some phytochemicals function as antioxidants.
- Important to recognize certain phytochemicals can be harmful.

Dietary Supplements Overview
- Regulated under the Dietary Supplement Health and Education Act (DSHEA).
- Definition: Products that supplement the diet with vitamins, minerals, herbs, etc.
- Mixed effectiveness; some beneficial while others are not.
Concept Checkpoint Questions
- Identify diet-related causes of death: heart disease, certain cancers, stroke, type 2 diabetes.
- Factors influencing eating habits include cultural, social, and personal beliefs.
- Six major classes of nutrients: carbohydrates, fats, proteins, vitamins, minerals, and water.
- Features determining essential nutrients include deficiency disease identification and resolution.
- Definitions:
  - Phytochemical: Plant-made substance with potential health benefits.
  - Dietary Supplement: Product that contains nutrients to increase dietary intake.