Diet/ general:
Dietary guidelines for Americans- 8th edition (2015-2020)
https://health.gov/dietaryguidelines/2015/guidelines/
What’s on your plate/ smart food choices for healthy ageing- PDF (80 pages)/ National Institute on ageing:
https://order.nia.nih.gov/sites/default/files/2019-05/whats-on-your-plate-508.pdf