Subtle signs you're not drinking enough

It's easy to become dehydrated in the warmer months without realising...

- 

It seems obvious to say that when you feel thirsty you should drink more, but by the time thirst kicks in most of us are already dehydrated. To put this into context, a 70kg adult can lose around 700-1,400ml of fluid (1-2% of body weight) before feeling thirsty.

Like most things in health, it's better to prevent dehydration by sipping fluids regularly than cure it, but this doesn't come easily to everyone. Fortunately, there are some subtle signs to watch out for that dehydration is setting in.

FAILING TO FOCUS