schematics or service

The history of USDA nutrition guides includes over 100 years of American nutrition advice. The guides have been updated over time, to adopt new scientific findings and new public health marketing techniques. The current guidelines are the Dietary Guidelines for Americans 2015 - 2020. Over time they have described from 4 to 11 food groups. Various guides have been criticized as not accurately representing scientific information about optimal nutrition, and as being overly influenced by the agricultural industries the USDA promotes.

View More On Wikipedia.org