nutrition~American Academy of Pediatrics (AAP) advises parents that the amount of food children need should vary based on their ages.
How Portion Sizes Have Changed Throughout History
serving size Penn State Dining Dietitians
Why is portion control so important? – Eat Smart
A Dietitian's Guide to Portions and Serving Sizes - Feed Your Potential
Food Serving Sizes: A Visual Guide
Portion Versus Serving Size - Community Healthcare Network
How portion sizes have changed over 25 years
Portions and Serving Sizes
Food Portions and Serving Sizes (Mindful Eats)
Serve sizes Eat For Health