One food pyramid tells consumers to eat two or three servings of meat per day; another version says eat meat sparingly. Who can consumers believe?

That’s the dilemma U.S. consumers are fac-ing thanks to a new book, Eat, Drink and Be Healthy, the Harvard Medical School Guide to Healthy Eating. In it, Walter Willett, MD, is pushing USDA to change its Food Guide Pyramid to reduce the amounts of pork and beef that Americans should eat daily.

The government’s current food pyramid calls for two to three servings daily of the food group that includes meat, poultry, fish, dry beans, eggs and nuts. But, Willett’s book separates pork from poultry, and places it in a category with beef and butter. This group is tagged “use sparingly”.

USDA expects to revise and re-release its food pyramid in a couple of years. During that time, National Pork Board officials say they will work to spread the word about how pork fits into a healthy diet, especially working to reach food media, health professionals and consumers. NPB officials contend that Willett’s book lacks credible science to back up his claims.