A Federal Court judge has rejected a request for him to taste a kids' snack food at the centre of a legal stoush over its nutritional value.

The Australian Competition and Consumer Commission has taken food giant Heinz to court alleging the company engaged in false and misleading representations in relation to its Little Kids Shredz products.

Before closing the ACCC case on Tuesday, Tom Duggan SC asked Justice Richard White to taste one of the products, made from dehydrated fruit and vegetables as well as concentrated fruit juice and fruit paste.

But Justice White refused the application on the basis that any conclusions he reached by eating the snack would be subjective and not capable of being analysed or scrutinised by anyone.