Diet

1. By Emma & Janani
B1B – DIET DILEMMAS

3. Teenagers
need more
protein to
grow.
Older
people need
more
calcium to
protect the
bones.
Athlete’s need
more protein for
their muscles to
grow and need
carbohydrates
for energy

4. You can calculate the recommended
daily allowance (RDA) protein using this
formula:
RDA (g) = 0.75 x body mass (kg)

5. The body mass index (BMI) is used as a guide
to help decide whether someone is
underweight, normal, overweight or obese.
BMI = mass in kg ÷ (height in m)2
This table shows how BMI is used to
classify people’s weight.
BMI meaning
under 18.4 underweight
between 18.5 and
24.9
ideal weight
between 25 and 29.9 over the ideal weight
between 30 and 39.9 obese
over 40 very obese

6. The body mass index (BMI) is used as a guide
to help decide whether someone is
underweight, normal, overweight or obese.
BMI = mass in kg ÷ (height in m)2
This table shows how BMI is used to
classify people’s weight.
BMI meaning
under 18.4 underweight
between 18.5 and
24.9
ideal weight
between 25 and 29.9 over the ideal weight
between 30 and 39.9 obese
over 40 very obese