The micro-nutrient content in commonly used ready-made baby meals contain less than a fifth of the recommended daily supply of calcium, magnesium, zinc, iron and other minerals, new research suggests. Researchers took eight different sample jars produced by four popular brands from the shelves of leading supermarkets and investigated the micro-nutrient content. The research showed that infants given one meat jar and one vegetable jar on top of 600ml of formula milk would not be getting enough calcium, magnesium, copper and selenium. On average, the levels were below 20% of the recommended daily supply.