Images provided by:
1: BigStock / Steve VanHorn
2.1: BigStock / Kathy Burns-Millyard
2.2: iStock / ac_bnphotos
3: iStock / Robyn Mackenzie
4.1: BigStock / Robyn Mackenzie
4.2: iStock / Lauri Patterson
5: BigStock / Daniel Rajszczak
6: iStock / Morgan Lane Studios
7.1: BigStock / Adrian Hughes
7.2: iStock / Dan Fletcher
8: BigStock / Darleen Stry
9.1: iStock / Foodphoto
9.2: iStock / Rob Belknap
10: BigStock / Z I Group
11.1: BigStock / Emilia Stasiak
11.2: BigStock / Graca Victoria
12.1: iStock / MBPHOTO Inc.
12.2: BigStock / John Johnson
13.1: BigStock / Ekaterina Ostanina
13.2: BigStock / Jostein Hauge
14.1: iStock / Alena Dvorakova
14.2: iStock / Studio Araminta
15.1: iStock / Kevin Thomas
15.2: BigStock / Edyta Pawlowska
Sources:
NIH, DDS, NIDDK:Just Enough for You <http://win.niddk.nih.gov/publications/just_enough.htm#difference>
The WebMD: Portion Size Plate <http://www.webmd.com/diet/healthtool-portion-size-plate>
National Institutes of Health: <http://www.nlm.nih.gov/medlineplus/carbohydrates.html>
MyFood-A-Pedia: <http://www.myfoodapedia.gov/Default.aspx>
Dr. Brunilda Nazario, ed. "Slideshow: The 7 Wonders of Water" WebMD.com. July 1, 2009.
MyPyramid.gov
National Institutes of Health: <http://win.niddk.nih.gov/statistics/index.htm>
USDA: Body Mass Index and Health <http://www.cnpp.usda.gov/.../NutritionInsights/Insight16.pdf>
USDA: Grain Train Pamphlet <www.cnpp.usda.gov/Publications/.../2000DGBrochureGrainTrain.pdf>
USDA: Comments Summary Report <http://www.cnpp.usda.gov/...mentReports/CommentsMtg2-Vit.pdf>
USDA: Economic Research Service <http://www.ers.usda.gov/Briefing/DietQuality/Availability.htm>