<P> Many nutritional experts , like Harvard nutritionist Dr. Walter Willett , believe the 1992 pyramid does not reflect the latest research on dietetics . Certain dietary choices that have been linked to heart disease , such as an 8 oz ( 230 g ) serving of hamburger daily , were technically permitted under the pyramid . The pyramid also lacked differentiation within the protein - rich group ( `` Meat , Poultry , Fish , Dry Beans , Eggs , and Nuts '' ) . </P>
<P> Many nutritional experts , like Harvard nutritionist Dr. Walter Willett , believe the 1992 pyramid does not reflect the latest research on dietetics . Certain dietary choices that have been linked to heart disease , such as an 8 oz ( 230 g ) serving of hamburger daily , were technically permitted under the pyramid . The pyramid also lacked differentiation within the protein - rich group ( `` Meat , Poultry , Fish , Dry Beans , Eggs , and Nuts '' ) . </P>
what did the original food guide pyramid fail to illustrate
what did the original food guide pyramid fail to illustrate
the latest research on dietetics
the latest research on dietetics