I very often find myself wondering about the nutritional value of this or that, or assessing whether something I am feeding DD is 'healthy' or not. Today's questions were whether the broccoli that I (deliberately) over-steamed retained any of its vitamins and fibre, and whether ketchup is really "good for you" as I heard claimed (I would have thought it had so much sugar and salt that the beneficial qualities of the lycopene would be completely outweighed). What I need is a reference book aimed at the domestic cook that will answer these and other questions. Can you recommend one please?