Nutrition and HealthNutrition and Health

AQA 11.2 b1a gcseAQA 11.2 b1a gcse

Diet - the basics Diet - the basics

Healthy diets are balanced in the context ofHealthy diets are balanced in the context of

Proteins – Proteins – build muscle and cellsbuild muscle and cells

Carbohydrates- starch and sugars - Carbohydrates- starch and sugars - energyenergy

Fats and oils – Fats and oils – cell membranes and energycell membranes and energy

Minerals and vitamins - Minerals and vitamins - healthhealth

Fibre – Fibre – helps food move through the intestinehelps food move through the intestine

Water – Water – hydration of the body hydration of the body

Eat more of some and less of othersEat more of some and less of others

What is malnutrition?What is malnutrition?

Health and Body imageHealth and Body imageWhat factors influence how we see ourselves?What factors influence how we see ourselves?

Advertising?Advertising?

Models, film stars or famous people?Models, film stars or famous people?

Popular music culture Popular music culture

Who are most vulnerable to images of so called Who are most vulnerable to images of so called ‘desirable’ body shape and size?‘desirable’ body shape and size?

What do you think?What do you think?

Anorexia – physiological diseaseAnorexia – physiological disease

Lack of food and health Lack of food and health problemsproblems

Deficiencies – there are so many you don’t need Deficiencies – there are so many you don’t need to know any – (Scurvy – lack of vitamin C is one)to know any – (Scurvy – lack of vitamin C is one)

BUT you must know that ‘starvation’ causes:BUT you must know that ‘starvation’ causes:

Reduced resistance to disease.Reduced resistance to disease.

Irregular periods in women - Irregular periods in women -

ObesityObesity

How would you describe an obese How would you describe an obese person?person?

Where does Where does

being overweightbeing overweight

stop and obesity start?stop and obesity start?

Obesity – is also malnutrition Obesity – is also malnutrition

However it can be linked to a However it can be linked to a persons genes, some persons genes, some families are more likely to families are more likely to become overweight without become overweight without careful dietary control, careful dietary control, particularly when linked with particularly when linked with poor exercise routinepoor exercise routine

TOO MUCH FOOD AND TOO LITLE TOO MUCH FOOD AND TOO LITLE EXERCISE WILL LEAD TOEXERCISE WILL LEAD TO

Arthritis – worn jointsArthritis – worn jointsDiabetes – high blood sugar levelDiabetes – high blood sugar levelHigh blood pressureHigh blood pressure

Heart and blood vessel Heart and blood vessel

disease (cardiovascular)disease (cardiovascular)

A question of balanceA question of balance

To maintain your weight 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 Height to weight weight ratioratio

Body mass indexBody mass index

BMI Categories: BMI Categories: Underweight = <18.5 Underweight = <18.5 Normal weight = 18.5-24.9 Normal weight = 18.5-24.9 Overweight = 25-29.9 Overweight = 25-29.9 Obesity = BMI of 30 or greaterObesity = BMI of 30 or greater

BMI = weight Kg ÷ height2 m2

Doctors can assess whether people are obese using BMI – however it is not totally reliable.

What is your BMI?

Fast foods Fast foods

High in fats and salt – High in fats and salt –

not good if eaten to excess. not good if eaten to excess.

Diets – which do you choose?Diets – which do you choose?

Atkins

G.I diet

Weight watchers

F-plan

and the rest