What you eat and how much of it you need depends on your caloric requirements. The number of calories that you need each day day will depend on your age, weight, height, activity level, and health goals. Carbohydrate and protein each contribute four calories per gram, while fat contributes nine calories per gram. Soluble fiber only contributes two calories per gram and insoluble fiber contributes zero calories because it passes through without being absorbed, which is one way that fiber keeps the body regular.
The minimum calorie count recommended for adults is 1,800 calories per day for sedentary women and 2,400 calories per day for sedentary men, based on the U.S. Department of Health and Human Services and U.S. Department of Agriculture 2020–2025 Dietary Guidelines for Americans. Ninth Edition.Only children and youth can eat lower calorie counts and still satisfy their nutritional needs. There is no single diet that works for everyone. There are, however, a few general ranges.
The USDA’s Dietary Guidelines for Americans provide percent ranges for each macronutrient in the Healthy U.S.-style Pattern. For adults, the organization recommends consuming 10% to 35% of calories from protein, 45% to 65% from carbohydrates, and 20% to 35% from fat. The guidelines also suggest consuming less than 10% of total calories from saturated fat.1
Those following a healthy vegetarian eating plan should meet the same nutrient and Dietary Guidelines standards as in the Healthy U.S.-style Pattern, so macronutrient ranges are the same. The difference between the two eating styles is the foods chosen within each food group. Someone on a vegetarian diet should try to consume 55% carbohydrate, 14% protein, and 34% fat with 3.5-ounce equivalents of protein foods, including legumes, soy products, eggs, nuts, and seeds.2
Those following a Mediterranean-Style eating plan should also meet the same nutrient standards as the Healthy U.S.-style Pattern, so the macronutrient ranges are the same. The difference between the two eating patterns is that the Mediterranean-style diet containsmore fruit and seafood and less dairy than the Healthy U.S.-style Pattern. For example, the USDA recommends 15 ounce-equivalents per week of seafood for those following a 2000-calorie-per-day Mediterranean diet, but only 8 ounce-equivalents per week of seafood for those following the Healthy U.S.-Style Pattern. The Mediterranean diet can be 52% carbohydrate, 18% protein, and 32% fat.3
Carbohydrates break down into an energy source for the body, especially the brain. They also add fiber to the diet which helps smooth digestive processes. Protein is important for maintaining muscle mass, cellular renewal and supporting the immune system.
A little research goes a long way, for example, some vegetables contain protein, so even if you are a meat eater, you don’t have to limit yourself to getting protein from animal sources. Newer research indicates that eating more plant-based protein may help reduce heart disease, since nuts and legumes are considered more heart-healthy than processed meat.4
Even though each person’s individual lifestyle will dictate how much protein, fiber and carbs to eat to feel good every day, a balanced plate is generally favored over one that eliminates an entire food group. In other words, choose to eat balanced meals that are sustainable for your activity level and lifestyle and try not to be swayed by fad diets.
No matter how you choose to eat, always hydrate daily with clean water. Don’t miss the PiMag Waterfall® sale at 20% off through August 31, 2025!
1, 2, 3 https://www.verywellfit.com/daily-diet-composition-calculator-charts-carbs-protein-fat
4 https://rightasrain.uwmedicine.org/body/food/all-about-protein
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