Radio 4 in Four - Eight glasses of water a day: should you follow targets? - ÃÛÑ¿´«Ã½ Sounds

Radio 4 in Four - Eight glasses of water a day: should you follow targets? - ÃÛÑ¿´«Ã½ Sounds
Eight glasses of water a day: should you follow targets?
Ten fruit and vegetables a day? 10,000 steps a day? Are these sort of targets helpful?