The U.S Food Pyramid actually recommends an unhealthy diet, one that promotes a heavy grain diet(some people actually believe that this is due to the corn lobby) when healthier diets have been found. Of course, it can be difficult to recommend one diet when there is so much conflicting evidence, but experts nevertheless tend to think that the Food Pyramid is not a good guide for health.
An article by Harvard’s Public Health department (https://www.hsph.harvard.edu/nutritionsource/mypyramid-problems/)
criticizes the Food Pyramid for a multitude of reasons. First, it reccomends a low fat diet, and fails to mention that some fats are actually very healthy, such as omega-3 fats found in fish (this is why people take fish oil), as well as polyunsaturated fats that can come from a variety of sources. Harvard also criticizes it for grouping “healthy proteins (fish, poultry, beans, and nuts) into the same category as unhealthy proteins (red meat and processed meat), and overemphasiz[ing] the importance of dairy products.” Again, some believe this is due to the farm lobby, but that is a subject for another post.
America has an undeniable health problem related to poor diets: 2/3 of American adults are overweight or obese (https://www.niddk.nih.gov/health-information/health-statistics/Pages/overweight-obesity-statistics.aspx). Solutions to this are not easy, and likely come from some combination of making better personal decisions, changing the overall eating culture, and getting accurate information about diet and food out. USDA should be ashamed of itself for providing unhealthy suggestions to the American people.