Ministers have launched a healthy living programme, called Top Tips for Mums, aimed at families with young children in England.
Health minister Caroline Flint said: '[It] will help families share ideas about what works for them in overcoming the barriers to a healthy diet.'
The programme launch follows a Medical Research Council report that found parents often had limited awareness of their child's weight status.
Report co-author Susan Jebb said: 'Modern lifestyles favour obesity and our evidence shows that parents face challenges in promoting heathy eating and physically active lifestyles. This report focuses on families, but tackling obesity will require unprecedented change across the whole of society.'