Book excerpt: Every parent wants their child to be happy, healthy and perform well at school. So how can you help your child achieve this? Surprising as it may seem, your child's diet plays a large part. In this concise, easy-to-follow book Patrick Holford and Fiona McDonald Joyce show parents how to maximise their child's health - and brainpower - by improving their diet. Based on Smart Food for Smart Kids, an in-depth book by the same authors, this guide distils the main points of that book and includes the four golden rules for ensuring your child is getting everything they need from their diet. Food builds the very structure of your child's brain and governs how your child thinks and feels to a massive degree, so it's vital you understand the basics of giving your child the best possible foods. A Quick Guide to Smart Food for Smart Kids will help you make the best decisions on what to include - and exclude - from you child's diet. NOTE: the information in this book is taken from Smart Food for Smart Kids, by the same authors.