Health Course

Chapter 1 - Taking Charge of Your Health

3. Water

Your body is about 60% water; you can live up to 50 days without
food, but only a few days without water. Water is vital to life itself –
and yet we often ignore the importance of water for our body's
health.

Many people use their thirst as a guide to how much water they
should drink, but thirst is the body's first sign of dehydration. We
all lose water each day through urine, faeces, sweat and respiration
from our lungs. Adults need to drink about 6 to 8 glasses of water
every day, and even more in hot weather or during exercise. Water
is vital for kidney function, regulating body temperature and
replenishing bodily fluids. So drink up – water is kilojoule-free!