Healthy and Healthy Eating Flashcards
(86 cards)
What is nutrition?
study of the relationship between essential elements of foods & physiological function
What are nutrients?
chemical substances in food used by the body to:
1. provide energy & structural materials to support growth
2. maintenance & repair of tissues
3. prevent diseases of malnutrition
What are the 6 classes of nutrients?
· 6 classes of nutrients:
- proteins, fats, carbohydrates
Vitamins, minerals, water
‘More is known about nutrition than is true”
Macro vs micronutrients?
Macronutrients
· Water
· Protein, fat, carbohydrate - energy-yielding nutrients
Micronutrients
vitamins and minerals
How do we measure food energy?
· energy is measured in kilocalories (kcals)
· amount of energy needed to raise temperature of water 1(1 kcal = 1000 calories)
· energy available = CHO, fat & protein content
What are vitamins?
organic nutrients required by the body to perform specific vital functions and to support optimal health
· 13 vitamins
- Water-soluble: B-complex and vitamin C
- easily absorbed, transported in water compartments of the body
- not stored in the body - diet must supply frequently
□ fat-soluble: A, D, E, K B
- require fat for absorption in GI tract
stored in the body - can eat less frequently
What are the diverse roles of vitamins?
- growth & development
- healthy nerve and skin cells
- new cell synthesis e.g. blood cells
- ” Build bones and teeth
- Immune function
- support the production of energy
Dietary sources of vitamins?
widely available in the food supply
Vegetables & fruits, whole/fortified grains, meats, dairy, eggs, legumes, nuts/seeds
What are minerals?
· minerals - inorganic, 16 are essential
- found in the bones, teeth and body fluids
· major vs trace minerals
e.g. calcium vs iron
What are the many diverse roles of minerals?
- Regulation of several important body functions
- Fluid balance, acid/base balance, immune function, body temperature, metabolic rate
- nerve & muscle function, healthy bones & teeth
- Oxygen transport
Dietary sources of minerals?
meats, dairy, eggs, legumes, nuts/seeds, vegetables & fruit, whole/fortified grains
What are some minerals of concern?
sodium: excessive intake: > 2300 mg
- contributes to hypertension, calcium loss
- recommendation = 1500 mg/day
- mean = 2760mg/day (higher in males)
calcium: strong bones & teeth
- RDA = 1000 mg/day
- key sources: diary, salmon, nuts, veggies
iron: required for oxygen transport
- RDA: 8 mg/day (M), 18 mg/day
- key sources: red meat, eggs, legumes, tofu, leafy greens
Dangers of supplements?
· Health effects: far-reaching
· Deficiency - minor symptoms to major illness
▪ e.g. scurvy, rickets, blindness, anemia, osteoporosis
· Toxicity - can produce many adverse health effects
· Whole food sources are best:
- Better absorbed
- Additive and synergistic effects
- lower risk of toxicity
a well-balanced diet should eliminate the need for supplements for most people
What is water?
is an abundant essential nutrient
- most needed of all nutrients
· medium for all of life’s processes
- transport system to and from body tissues
- regulates body temperature, blood volume, pH balance
- participates in metabolic reactions
- Lubricates and cushions many parts of body
· water needs vary: e.g. age, temperature, diet,
- 2.7 L per day (women), 3.7 L per day (men)
- sources: drinking water, other beverages, many foods
What are diet and health?
· nutrition profoundly affects health
· Poor diet - known risk factor for many chronic diseases
· effects of a healthy diet are cumulative
modifiable risk factor
What are the goals of diet and health?
· adequate, balanced supply of macro and micronutrients
· Variety
· healthy blood lipid profile
· Normal blood pressure
Blood glucose control
avoid deficiency or toxicity healthy body weight reduce risk of CVD, T2 diabetes, cancer
What are dietary diseases?
· a traditionally associated with dietary deficiency
- malnutrition
· currently associated with over-consumption
- poor eating habits, overweight & obesity
What are the factors that food choices are influenced by?
Family traditions - what you know and like
- Social factors - special occasions, social pressure
- cultural influences - ethnic and religious beliefs
- Practical considerations - time, money, food availability knowledge - food preparation, nutrition
What is Canada’s food guide?
· Evidence-based nutrition policy
- defines, and promotes healthy eating for Canadians
· translates the science of nutrition & health
healthy eating recommendations
it was changed in 2019.
Healthy eating.
What are dietary patterns?
- Low CHO diets - weight loss, health benefits?
- paleo, gluten free, ketogenic diets
- KETO
· organic, genetically modified foods
dietary fats and heart health
What are extreme dietary practices?
- weight loss, sports performance, cancer prevention
· Intermittent fasting
Edible cannabis
What are dietatry reference intakes?
· Dietary Reference Intakes (DRIs)
- current recommendations for nutrient intakes (Can & U.S.)
· amount of nutrients required to:
- Avoid deficiencies and prevent chronic diseases
Recommended Dietary Allowance(RDA)?
Average daily intake sufficient to meet requirements of 97-98% of healthy people