A reader's 27-month old son is suffering from some learning difficulties, following a serious iron deficiency in his earlier months. What can she do to help him? The first step is to throw all negative comments from doctors out the window, says one mother, whose daughter has Down's syndrome. Then work on developing your child's cognitive skills by experimenting with as many teaching methods as possible (eg use more visuals, introduce new experiences). Never set limits as to what your child can achieve _ always push a little further and not let things slide. Probably the most important of all, instil in them a solid sense of self-worth and self-confidence. To improve cognitive function, make sure the diet contains plenty of antioxidant nutrients such as vitamin A, C, E and selenium, which fight off damaging free radicals and protect the neural pathways. To rebuild iron levels, one reader suggests chorella supplements, which are also good as an all-round health enhancer.