Introduction

  • Instructor: Dr. Andrea Doss (teaching until February 28)
  • Courses: Teaching protein section, guidelines, and related nutrition classes.
    • Teaching to provide a break to Dr. Sedi.

Lecture Guidelines

  • Materials: Lecture slides posted on e-class (first two slides available, remaining finalized after reading week).
  • Examination Content: Students will be tested on material covered in slides and lectures only.
  • Supplementary Notes: Dr. Sedi's notes are supplementary. Content in his notes not covered in lectures is not exam material.

Instructor Background

  • Profession: Nutritionist and exercise physiologist.
  • Research Focus: Human nutrition, specifically protein, diet, and exercise.
  • Academic Journey: Studied kinesiology at McMaster and nutritional science at the University of Toronto, also completed a PhD at McMaster.
  • Prior Experience: Taught at Brock University for four years; research area in protein for weight loss and health improvements.

Protein Consumption in Canada

  • Canadian Community Health Survey (CCHS): Assesses dietary intake across Canada.
  • Importance of Survey: Guides public health nutrition strategies by identifying nutrient deficiencies or excesses.
Current Protein Consumption Statistics
  • **Intake by Age:
    • Children:** Approximately 15.6% of daily caloric intake from protein.
    • Adults: About 17% of daily caloric intake from protein.
  • National Recommendation: 10-35% of daily calories from protein.
  • Common Protein Sources:
    • Dairy: 63% of Canadians consume.
    • Meat: About 50% consume.
    • Eggs: 43% consume.
    • Fish and Shellfish: Less frequently consumed due to cost and allergies.
Demographics from the CCHS
  • Data Comparison: 2004 vs. 2015 survey data.
    • BMI Changes: Increased BMI in the population (potential obesity rising).
    • Supplement Use: Rise in dietary supplement use noted.

Recommended Daily Allowance (RDA) and Macronutrient Distribution

  • RDA Definition: Recommended dietary allowance is established to meet nutrient needs of 98% of the population.
  • RDA for Protein: 0.8 grams of protein per kilogram of body weight for those aged 18 and older.
  • AMDR for Protein: Acceptable macronutrient distribution ranges from 10-35% of total caloric intake derived from protein.
Calculating Protein Needs
  • RDA Calculation Example: Multiply body weight by 0.8 g/kg to determine daily protein needs (e.g., a 60 kg female requires 48 grams of protein).
  • AMDR Calculation: Calculate based on a standard 2,000-calorie diet (10-35% of total daily calories equals 50-175 grams of protein).

Protein Sources and Comparison

  • Animal vs. Plant Protein Sources:
    • Animal sources provide a higher protein content per calorie than most plant sources.
    • Visual comparison of protein content in common foods: (e.g., Chicken breast: 30g protein per 3.5 oz)
  • Sampling of Foods:
    • Animal Sources: Chicken, ground beef, flank steak.
    • Plant Sources: Nuts, legumes. Wider variety needed to achieve same protein content.

Current Food Guidelines

  • Old vs. New Food Guide:
    • Old guide had distinct dairy and meat groups; new guide combines protein foods.
    • Current recommendations emphasize consuming a variety of foods, with a focus on more plant-based sources such as vegetables and grains.

Analysis of Plant-based Eating

  • Clarification of Plant-based Recommendations:
    • Emphasis on minimally processed plants, rather than processed food products like Beyond Meat burgers.
  • Nutritional Comparison: Ground beef vs. plant-based options show differences in calorie count, fat content, and nutrient profiles.

Food Processing Overview

  • Types of Processing:
    • Unprocessed Foods: Raw fruits and vegetables.
    • Minimally Processed: Frozen veggies and dairy products.
    • Processed Foods: Foods made shelf-stable with few additives (e.g., canned foods).
    • Ultra-Processed Foods: Highly manipulated food products (e.g., snacks, fast food).
  • Nutritional Implications: Importance of choosing minimally processed foods for health benefits.

Summary

  • Canadians are meeting the RDA for protein but need to be cautious about ultra-processed foods.
  • Critical evaluation of nutritional information is essential (beware of misinformation).
  • Understanding food processing can aid in informed dietary choices.