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Is your child drinking enough water? Fizzy, sweet drinks (or tea or coffee) are not acceptable substitutes; most have undesirable ingredients and may even cause you to lose water. Your body is 50-70 per cent water (and your brain 85 per cent)—but you lose it constantly through breath, sweat, urine and faeces. You can only survive a few days without water, as its remarkable properties help to mediate every function in your brain and body.

Without enough water your child will become dehydrated, which can lead to headaches and tiredness. His concentration and his digestion will be impaired, along with most other functions. Make sure your child drinks enough at home, and that he takes water to school with him if the school doesn’t provide this. Your child can also get water from food, especially fruit and vegetables, or fruit juices (best diluted—by you) or herbal teas. Unfortunately, vending machines that sell fizzy drinks are found in most schools. Most soft and fizzy drinks can upset blood sugar levels, but schools often depend on the income the vending machines generate.