New research from dairy cooperative Arla revealed the startling findings in Wales Worried Welsh parents have no idea how much calcium their kids need a day. A whopping 87 per cent of parents surveyed admit they don’t know how much calcium is needed for a healthy diet, while four in ten reckon their children don’t get enough variety in what they eat. Over a third (35 per cent) believe their kids aren’t getting their five a day, almost a quarter (24 per cent) admit their kids aren’t active enough, while only 38 per cent are aware that milk constitutes a key source of protein.