It is often bandied about that we are made up of 70% water, but few of us understand why this has a bearing on how much we should actually consume. The simple answer Sven proffers is that water fundamentally drives every function and system in our bodies, meaning that dehydration causes a gradual shut-down of our organism – something easily observed at an alarmingly speedy rate in infants and the elderly.

Sven also warns that as we grow older, our signals weaken, meaning that we’re often not prompted to drink until our bodies are beyond mildly dehydrated, which can compromise our general health.
SYMPTOMS OF DEHYDRATION
Symptoms of prolonged dehydration include: headaches, dry mouth, swollen tongue (often with serrated edges), dry skin, confusion, tiredness, irritability, abnormally dark urine, rapid breathing, palpitations, constipation, low blood pressure, dizziness or fainting on standing, listlessness and insomnia. Chronic dehydration can also lead to kidney stones.

Come heat or cold, 1½ litres of liquids a day is the staple we should be aiming for, topping up this amount if doing physical exercise or in high temperatures causing us to sweat. (If you are under medical supervision, particularly for water retention, heart, or kidney function problems, always consult with your health practitioner before increasing your liquid intake.)
WHAT DRINKS COUNT TOWARD HYDRATION?
Fact: caffeinated drinks – coffee, tea and Coca Cola – do not count towards our daily liquid intake. In fact, in concentrated doses, they dehydrate us further. The same of course applies to alcohol.

AND FINALLY…
A couple of things I needed to clear up.
1) Why when we increase our liquid intake do we find ourselves continually needing to pee? Surely this is an indication that we are overhydrating? Thankfully, Sven is on hand to dispel this myth once and for all. He likens a body in a state of dehydration to an old dis-used sponge: “If you try and wet it, the sponge has no absorbency, and the water just runs straight through it.” The human body is the same. The dried cells need time to soften – once softened, their absorbency rate increases significantly. With time, they become spongey and full, and primed to function at optimum level. Sven recommends that to avoid waking in the night to pee, best to start the day with a wholesome burst of liquid intake, maintain it at a moderate level throughout the day, and ease off into the evening/night.
2) Surely if we increase our daily liquid intake so efficiently, a day without such a liberal supply will send our bodies into crisis? Wrong. Back to the camel analogy. As our body will already be in such a good generalised state of hydration, it will in fact be far more resilient to the odd lapse here and there, meaning that we’re much more armed against the high summer temperatures ahead.

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