I suppose that in most industrialised countries people have become accustomed to the exhortation to eat 5 a day, but I fear that another 'magic number' is about to become generally known: 3 a day. I came across this new minimum when I opened a pack of cheese (Cheddar, naturally). It seems we should eat or otherwise imbibe three portions of dairy products each day - one each of milk, cheese and yoghourt.
It's just as well we have two hands - one for the 5 a day foodstuffs, one for the 3 a day. But what do we do about counting the units of alcohol and the number of calories? If this counting business grows much more we won't have time to eat.