Portion size: MedlinePlus Medical Encyclopedia (2024)

It can be hard to measure out every portion of food you eat. Yet there are some simple ways to know that you are eating the right serving sizes. Following these tips can help you control portion sizes for healthy weight loss.

A recommended serving size is the amount of each food that you are supposed to eat during a meal or snack. A portion is the amount of food that you actually eat. If you eat more or less than the recommended serving size, you may get either too much or too little of the nutrients you need.

People with diabetes who use the exchange list for carb counting should keep in mind that a "serving" on the exchange list will not always be the same as the recommended serving size.

For foods like cereal and pasta, it may be helpful to use measuring cups to measure out an exact serving for a couple of days until you get more practiced at eyeballing the appropriate portion.

Use your hand and other everyday objects to measure portion sizes:

  • One serving of meat or poultry is the palm of your hand or a deck of cards
  • One 3-ounce (84 grams) serving of fish is a checkbook
  • One-half cup (40 grams) of ice cream is a tennis ball
  • One serving of cheese is a pair of dice
  • One-half cup (80 grams) of cooked rice, pasta, or snacks such as chips or pretzels is a rounded handful, or a tennis ball
  • One serving of a pancake or waffle is a compact disc
  • Two tablespoons (36 grams) of peanut butter is a ping-pong ball

You should eat five or more servings of fruits and vegetables each day to help reduce your risk of cancer and other diseases. Fruits and vegetables are low in fat and high in fiber. They will also help fill you up so that you are satisfied at the end of your meals. They do contain calories, so you should not eat an unlimited amount, especially when it comes to fruits.

How to measure out the correct serving sizes of fruits and vegetables:

  • One cup (90 grams) of chopped raw fruits or vegetables is a woman's fist or a baseball
  • One medium apple or orange is a tennis ball
  • One-quarter cup (35 grams) of dried fruit or nuts is a golf ball or small handful
  • One cup (30 grams) of lettuce is four leaves (Romaine lettuce)
  • One medium baked potato is a computer mouse

To control your portion sizes when you are eating at home, try the following tips:

  • Do not eat from the bag. You could be tempted to eat too much. Use the serving size on the package to portion out the snack into small bags or bowls. You can also buy single-serving portions of your favorite snack foods. If you buy in bulk, you can divide snacks up into single-serving portions when you get home from the store.
  • Serve food on smaller plates. Eat from a salad plate instead of a dinner plate. Keep serving dishes on the kitchen counter so you will have to get up for seconds. Putting your food out of easy reach and out of sight will make it harder for you to overeat.
  • Half of your plate should contain non-starchy vegetables. Divide the other half between lean protein and whole grains. Filling half of your plate with non-starchy vegetables, such as leafy greens, before you serve the rest of your entree is one of the easiest methods of portion control.
  • Substitute lower-fat varieties of food. Instead of whole-fat cream cheese, sour cream, and milk, buy low-fat or skim instead. Use half the amount you would normally use to save even more calories. You can try replacing half of the cream cheese with hummus or mix the sour cream with plain yogurt to make this easier.
  • Do not eat mindlessly. When you snack in front of the television or while doing other activities, you will be distracted enough that you may eat too much. Eat at the table. Focus your attention on your food so you will know when you have had enough to eat.
  • Snack between meals if desired. If you are hungry between meals, eat a healthy, high-fiber snack such as a piece of fruit, small salad, or bowl of broth-based soup. The snack will fill you up so that you do not eat too much at your next meal. Snacks that pair protein and carbohydrates with fiber will leave you more satisfied. Some examples are having an apple with string cheese, whole-wheat crackers with peanut butter, or baby carrots with hummus.

To control your portion sizes when eating out, try these tips:

  • Order the small size. Instead of a medium or large, ask for the smallest size. By eating a small hamburger instead of a large, you will save about 150 calories. A small order of fries will save you about 300 calories, and a small soda will save 150 calories. Don't super-size your order.
  • Order the "lunch size" of a food, rather than the dinner size.
  • Order appetizers rather than entrees.
  • Share your meal. Split an entree with a friend, or cut your meal in half when it arrives. Put one half in a to-go box before you start eating. You can have the rest of your meal for lunch the next day.
  • Fill up with lower calorie foods. Order a small salad, fruit cup, or cup of broth-based soup before your entree. It will fill you up so that you eat less of your meal.

Alternative Names

Obesity - portion size; Overweight - portion size; Weight-loss - portion size; Healthy diet - portion size

Mozaffarian D. Nutrition and cardiovascular and metabolic diseases. In: Libby P, Bonow RO, Mann DL, Tomaselli GF, Bhatt DL, Solomon SD, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 12th ed. Philadelphia, PA: Elsevier; 2022:chap 29.

Parks EP, Shaikkhalil A, Sainath NN, Mitchell JA, Brownell JN, Stallings VA. Feeding healthy infants, children, and adolescents. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 56.

Snetselaar LG, de Jesus JM, DeSilva DM, Stoody EE. Dietary guidelines for Americans, 2020-2025: Understanding the scientific process, guidelines, and key recommendations. Nutr Today. 2021;56(6):287-295. PMID: 34987271 www.ncbi.nlm.nih.gov/pmc/articles/PMC8713704/.

Review Date 7/30/2022

Updated by: Stefania Manetti, RD/N, CDCES, RYT200, My Vita Sana LLC - Nourish and heal through food, San Jose, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

Related MedlinePlus Health Topics

  • Weight Control

Browse the Encyclopedia

Portion size: MedlinePlus Medical Encyclopedia (2024)

FAQs

Portion size: MedlinePlus Medical Encyclopedia? ›

Use your hand and other everyday objects to measure portion sizes: One serving of meat or poultry is the palm of your hand or a deck of cards. One 3-ounce (84 grams) serving of fish is a checkbook. One-half cup (40 grams) of ice cream is a tennis ball.

What are the USDA recommended serving sizes and portions? ›

Table 1.
Food GroupsAmounts for 2000 caloriesDinner
Vegetables (cups)Amounts for 2000 calories 2.5Dinner 1.5
Fruits (cups)Amounts for 2000 calories 2Dinner .5
Dairy (cups)Amounts for 2000 calories 3Dinner 1
Protein foods (oz)Amounts for 2000 calories 5.5Dinner 3.5
2 more rows

What is the acceptable portion size? ›

A clenched fist is about 1 cup — and that's the amount experts recommend for a portion of pasta, rice, cereal, vegetables, and fruit. A meat portion should be about as big as your palm. Limit the amount of added fats (like butter, mayo, or salad dressing) to the size of the top of your thumb.

How do I watch portion sizes? ›

The best way to determine the amount of food in a serving is to look at the Nutrition Facts label and measure it. For example, fill a measuring cup with the proper-sized portion of vegetables, rice, etc. and then empty it onto a plate. That will help you learn what these serving sizes look like.

What is the serving size in medicine? ›

The serving size refers to the number of units that should be taken at a time. For example, if the product's suggested usage directs you to take one capsule, three times per day, the serving size on the “Supplement Facts” panel will be one capsule.

Does the FDA regulate serving size? ›

The serving size for meal products and main dish products in multiserving containers must be based on the reference amount applicable to the product listed in the RACCs tables in 21 CFR 101.12(b), as required in 21 CFR 101.9(b)(3).

How does the FDA define a serving size to be? ›

By law, serving sizes must be based on the amount of food people typically consume, rather than how much they should consume. Serving sizes reflect the amount people typically eat and drink.

What are the USDA dietary guidelines? ›

The Dietary Guidelines for Americans (Dietary Guidelines) is the cornerstone for federal nutrition programs and a go-to resource for health professionals nationwide. The Dietary Guidelines provides food-based recommendations to promote health, help prevent diet-related chronic diseases, and meet nutrient needs.

What are the correct portion sizes to lose weight? ›

Most portion control plates designate how much of the plate a person should fill with each type of food:
  • 1/2 for vegetables.
  • 1/4 for protein.
  • 1/4 for carbohydrates.
Dec 1, 2023

Why are portion sizes a problem? ›

Portion distortion is an effect in which you eat more if you are served more food — sometimes more than your body needs. The rise of portion distortion in the West stems from supersized convenience foods such as fast-food and restaurant meals and packaged foods.

What is the 20 minute rule for eating? ›

Most Americans eat too fast, and, as a result, they take in too many calories before they realize they've eaten enough. It takes approximately 20 minutes from the time you start eating for your brain to send out signals of fullness.

Can you lose weight just by cutting portion size? ›

Portion control is simply cutting back on your food intake — your portions — so you can lose excess pounds and achieve a healthy weight. And no, it doesn't involve limiting your food choices. The main goal is to eat exactly how much food your body needs, no more and no less.

How many cups of food should I eat in a day? ›

Daily Goals: – Grains: 6 ounces (half whole-grain) – Vegetables: 2½ cups – Fruits: 2 cups – Dairy: 3 cups – Protein Foods: 5½ ounces • Amounts for each Daily Food Plan will vary depending on age, gender, and level of physical activity. For Daily Food Plans that represent other calorie levels, visit ChooseMyPlate.gov.

What is the 5/20 rule? ›

figure out if a food is HIGH or. LOW in a nutrient, Use the 5-20 Rule. If the % DV is 5 or less then it is low in that nutrient, If the% DV is 20% or more then it is high in that nutrient. The %DV is based on a 2,000- calorie diet – your needs might be more or less than this.

How many servings is one egg? ›

How many eggs are in one serving? Most often, one slice of bread or one apple makes a serving but in the case of eggs, two eggs is one Food Guide serving.

What does one serving look like? ›

A serving size is a measured amount of food—1 cup, 1 slice, 1 teaspoon, etc. It's the amount you'll see on a food label, and it's what the USDA uses in the Healthy Eating Guidelines and daily recommendations.

What is USDA nutrition guidelines? ›

The Dietary Guidelines for Americans (Dietary Guidelines) is the cornerstone for federal nutrition programs and a go-to resource for health professionals nationwide. The Dietary Guidelines provides food-based recommendations to promote health, help prevent diet-related chronic diseases, and meet nutrient needs.

What do the USDA Dietary Guidelines recommend? ›

It's important to eat a variety of fruits, vegetables, grains, protein foods, and dairy and fortified soy alternatives. Choose options for meals, beverages, and snacks that have limited added sugars, saturated fat, and sodium.

What is the USDA balanced food intake? ›

Make half your plate fruits and vegetables: vary your veggies. Make half your grains whole grains. Vary your protein routine. Move to low-fat or fat-free dairy milk or yogurt (or lactose-free dairy or fortified soy versions).

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