The popularity of protein-enriched foods continues to grow in the United States, with products like protein popcorn, chips, drinks, bars, and even ice cream filling supermarket shelves. Despite this trend, most Americans between ages 19 and 59 already meet or exceed their recommended daily protein intake, according to the Dietary Guidelines for Americans 2020-2025. Men in this age group are especially likely to consume more protein than recommended, often from animal sources high in saturated fat or sodium.
Knubian Gatlin, a registered dietitian at Houston Methodist, addressed concerns about excessive protein consumption and its potential health risks. “Whenever someone says they need a gram of protein per pound of body weight, this is where people start to experience some of the common side effects of eating too much protein, like constipation, bloating and stomach pain,” says Gatlin. “It’s very rare for a person to need that much protein, even among active adults and athletes.”
Gatlin explained that consuming more than one gram of protein per pound (or 2.2 grams per kilogram) of body weight is generally excessive for most people. The Food and Nutrition Board recommends adults consume 0.8 grams of protein per kilogram as a minimum amount needed to maintain health at their current weight.
“If you’re a little older or more athletic, you could increase your protein intake between 1 and 1.4 grams per kilogram of bodyweight,” Gatlin says. “In some cases, protein needs can increase roughly up to 1.7 grams per kilogram, but this is most suitable for a person that engages in regular, intense resistance training. Either way, the range of 0.8 to 1.7 grams per kilogram of body weight will cover the bases for most people.”
To estimate individual needs: divide your weight in pounds by 2.2 to get kilograms; then multiply by the recommended range (0.8–1.4). For example, an adult weighing 200 pounds should aim for between approximately 73 and 127 grams daily; highly active individuals may go up to about 155 grams.
Gatlin advises spreading out daily intake rather than consuming large amounts at once: “50 grams or more of protein at once is not very easy on the gastrointestinal tract,” he says. “Ideally you’ll want to eat about 0.35 grams per kilogram of protein per meal.” This typically means aiming for around 25–35 grams each meal; larger or more active individuals may require up to about 38–40 grams.
Protein is particularly important at breakfast because it helps promote satiety throughout the day and slows glucose absorption—helping prevent blood sugar spikes and dips that affect energy levels.
“Protein, especially in the morning gives us a chance to get that first set of building blocks in our system that we can use for tissue maintenance repairs and everything else that takes place throughout the day within our bodies,” he says. “Research suggests that people who regularly eat higher amounts of protein in the morning and spread it throughout the day tend to have increased longevity are able to do more on their own as they go through the aging process and are going to be more efficient at maintaining their muscle mass.”
For balanced meals containing adequate but not excessive amounts of protein (25–35g), Gatlin recommends dividing plates into half non-starchy vegetables/fruits; one quarter whole grains; one quarter lean proteins (animal or plant-based); minimizing saturated fats/sugars; and watching portion sizes.
Some foods count toward multiple macronutrients—for instance beans provide both carbohydrates (as starchy vegetables) and proteins—and including these alongside other fiber-rich options supports overall nutrient balance.
Eating too much protein over time can cause several issues:
Excess calories/weight gain: Eating extra protein usually requires eating more food overall which can lead to calorie surplus.
Certain micronutrient deficiencies: Diets heavy on animal products but low on plant-based foods risk missing key nutrients such as magnesium potassium vitamin C folate phytochemicals pigments fiber antioxidants.
Gastrointestinal distress: High-protein diets often lack sufficient fiber causing symptoms like constipation diarrhea bloating gas stomach pain.
Adverse cardiovascular outcomes: Overconsumption—especially from red meats/dairy—increases risk factors linked with heart disease stroke early death due partly to high saturated fat content.
Fiber also helps counteract some negative effects by slowing cholesterol/sodium absorption but only if paired with enough water intake—otherwise similar GI symptoms may occur.
“Rather than trying to eat more protein beyond 1.7 grams per kilogram I think people should be more concerned about more fiber intake more water more sleep and less stress,” Gatlin says.”This is one of the secrets to life.”
