Transcript Nutrition and balanced diet

Nutrition and Health
AQA 11.2 b1a gcse
Diet - the basics
Healthy diets are balanced in the context of
Proteins – build muscle and cells
 Carbohydrates- starch and sugars - energy
 Fats and oils – cell membranes and energy
 Minerals and vitamins - health
 Fibre – helps food move through the intestine
 Water – hydration of the body

Eat more of some and less of others
What is malnutrition?
Health and Body image
What factors influence how we see ourselves?
Advertising?
Models, film stars or famous people?
Popular music culture
Who are most vulnerable to images of so called
‘desirable’ body shape and size?
What do you think?
Anorexia – physiological disease
Lack of food and health
problems

Deficiencies – there are so many you don’t need
to know any – (Scurvy – lack of vitamin C is one)
BUT you must know that ‘starvation’ causes:

Reduced resistance to disease.

Irregular periods in women -
Obesity
How would you describe an obese
person?
 Where does
being overweight
stop and obesity start?

Obesity – is also malnutrition
However it can be linked to a
persons genes, some
families are more likely to
become overweight without
careful dietary control,
particularly when linked with
poor exercise routine
TOO MUCH FOOD AND TOO LITLE
EXERCISE WILL LEAD TO
Arthritis – worn joints
 Diabetes – high blood sugar level
 High blood pressure

Heart and blood vessel
disease (cardiovascular)

A question of balance
To maintain your weight
Energy intake = energy output
Does a bricklayer need to eat more than a teacher?
Do Eskimos need to eat more high energy foods than us?

Height to
weight
ratio
Body mass index
Doctors can assess whether people are obese
using BMI – however it is not totally reliable.
What is your BMI?
BMI = weight Kg ÷ height2 m2
BMI Categories:
 Underweight = <18.5
 Normal weight = 18.5-24.9
 Overweight = 25-29.9
 Obesity = BMI of 30 or greater
Fast foods

High in fats and salt –
not good if eaten to excess.
Diets – which do you choose?
G.I diet
F-plan
Weight
watchers
Atkins
and the rest