The food guide pyramid, informally known as the food pyramid, and formally titled the Improved American Food Guide Pyramid is a historical nutrition guide published in 1992 by the USDA to replace the earlier food groups classification system. The food guide pyramid suggested optimal nutrition guidelines for each food category, per day, using a mnemonic graphic of a pyramid with horizontal dividing lines, to represent suggested percentages of the daily diet for each food group. The food guide pyramid was superseded by the current USDA nutrition advisory program titled "MyPyramid" in April 2005.

Although foods contain many nutrients, it can be categorized into three groups: carbohydrates, proteins, and fats.

There are so many fad diets for weight loss on the market that consumers are confused about which one to follow. Most of these diets tend to limit the consumption of a particular macronutrient (protein, carbs or fat) or food group.

"Legally, the candy that melts hearts and comforts the brokenhearted is made with cocoa butter and, in the case of milk chocolate, whole milk. But the Grocery Manufacturers of America, a trade group, wants to let confectioners substitute cheaper ingredients: vegetable oils and milk-protein concentrates" Last day to comment to FDA is 4/25. Hurry!

It's energy density that's the enemy, not carbohydrates, or protein or any other nutritious food group. Many don't realize this, that's why they ask in frustration “Why haven't I lost any weight yet?” It can really be frustrating if you've been pouring out money on low-fat and organic food.

The bacterium that causes the plague belongs to a virulent family of bacteria called Yersinia, a group that also includes a pathogen responsible for food poisoning. These bacteria insert into their host cells proteins and other virulence factors, which kill by — among other things — disrupting the cells' normal structure.