Reed Elsevier has fat margins and high prices in a business based on information--a commodity, and one that is cheaper than ever in the internet era.

FORBES: Double Dutch No Longer

Even what seems thin may be fat: McDonald's (nyse: MCD - news - people ) latest line in healthy-looking salads may contain more fat than its hamburgers, according to a Reuters report, citing information on the company's Web site.

FORBES: Smart Money Still In Fat

Which? compared the nutritional content of the bars using the manufacturers' information and applied traffic light labelling to see if the levels of fat, saturated fat, sugar and salt were high, medium or low.

BBC: Cereal bars: Healthy image a myth - Which?

To ensure that consumers have a consistent product day to day, month to month and year to year, producers regulate the composition of milk fat, so contents of every like carton are indistinguishable, and of course, remain true to the nutritional information on the packaging.

FORBES: Why Milk Isn't As "Natural" As You Think