Final answer:
Portion size refers to the amount of food served at a single occasion, distinct from serving size which is a recommended amount. Tools like MyPlate help visualize and manage portion control for maintaining a healthy diet.
Step-by-step explanation:
Portion size refers to the amount served at a single occasion and is related to the amount of food you choose to eat for a meal or snack. It is not the same as a serving size, which is a measured amount of food recommended by health professionals and guidelines, and is often listed on a food's nutrition facts label. Portion control is an essential aspect of maintaining a healthy diet.
Understanding portion control includes knowing recommended serving sizes, which can be much smaller than the portions we may serve ourselves. Practical methods such as comparing food portions to common objects, like a deck of cards, or using the hand as a measurement tool can help in estimating appropriate portion sizes. Furthermore, recommendations such as the USDA's MyPlate provide a visual guide for balancing meals with adequate proportions of the different food groups, supporting overall calorie control and nutritional adequacy.