Nisha Pandey

Do Most Adults Eat More Protein Than They Need? New Review Challenges The 'High-Protein' Trend

Do Most Adults Eat More Protein Than They Need? New Study Challenges The 'High-Protein' Trend

Today, <span>protein</span> has found its way into everything from coffee and cereal to chips and even water. But a new scientific review suggests that for many adults, especially those who are not physically active, consuming more protein than needed may offer little benefit and could even have pose unintended health consequences.

Published in <em><span rel="noindex">Cell Press Blue</span></em>, the review analyzed more than 350 studies on restriction of protein, aging, metabolism, and longevity across humans and animal models. 

Researchers concluded that while protein remains essential in one's diet, most sedentary adults are likely consuming more than they need. It also found that bringing down excess protein intake may support healthier aging.

“It’s absolutely crystal clear that there are benefits of protein to <a href="https://www.healthandme.com/health-news/us-obesity-crisis-not-losing-weight-despite-hitting-the-gym-new-aha-study-reveals-why-article-155135548" data-type="tilCustomLink">muscle growth</a> and exercise response of active individuals,” said Dr. Dudley Lamming, aging researcher at the University of Wisconsin-Madison and the review’s corresponding author.

“But because most people are relatively sedentary, many people are likely consuming more protein than they actually need, which probably has negative health consequences,” he added.

The researchers explain that eating less protein appears to activate several biological pathways that are associated to healthy aging.

One key player is fibroblast growth factor 21 (FGF21), a hormone that rises when protein intake is reduced. 

Higher FGF21 levels have been associated with increased energy expenditure, better <a href="https://www.healthandme.com/health-wellness/smoking-diabetes-high-blood-pressure-may-fuel-the-most-dangerous-type-of-artery-plaque-study-finds-article-155204401" data-type="tilCustomLink">blood sugar</a> control, lower inflammation, and healthier metabolism. Animal studies have also linked elevated FGF21 to longer lifespan.

The review also highlights specific amino acids, including methionine, isoleucine, and valine, which may influence aging-related processes when consumed in excess. Restricting these amino acids appears to alleviate cellular stress and improve metabolic health in experimental studies.

Also read: <a href="https://www.healthandme.com/health-news/no-junk-food-near-schools-maharashtra-fda-bans-sale-of-foods-drinks-high-in-fat-salt-sugar-article-155217874" data-type="tilCustomLink">No Junk Food Near Schools! Maharashtra FDA Bans Sale Of Foods &amp; Drinks High In Fat, Salt &amp; Sugar</a>

Researchers caution that the findings do not mean everyone should start eating a low-protein diet.

Protein requirements vary depending on age, activity level, health status, and life stage. Athletes, pregnant women, people recovering from illness or surgery, and many older adults often require more protein for muscle maintenance and recovery.

“Recent recommendations have encouraged people to eat more <a href="https://www.healthandme.com/parenting/should-children-take-protein-powders-a-dietitians-perspective-article-155220805" data-type="tilCustomLink">protein</a>, but they’ve also encouraged people to exercise more,” Lamming said. “We probably need to personalize protein recommendations based not just on age, but also on how physically active people are.”

<h2>How Much Protein Do Adults Actually Need?</h2>

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For healthy adults, the recommended dietary allowance is 0.8 grams of protein per kilogram of body weight daily. Although individual needs increase with <a href="https://www.healthandme.com/health-wellness/can-fitness-hide-lung-cancer-why-even-active-people-shouldnt-ignore-symptoms-article-155225299" data-type="tilCustomLink">regular exercise</a>, aging, pregnancy, or certain medical conditions. 

Many adults already exceed these recommendations through regular meals alone, even before adding protein supplements.

The researchers acknowledge that much of the evidence comes from animal studies, and long-term human trials are still limited. They say future research should determine exactly who benefits from lower protein intake and who needs more.

As protein-fortified products continue to flood supermarket shelves, the researchers argue that dietary advice should become more personalized rather than assuming higher protein intake benefits everyone. 

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Today, protein has found its way into everything from coffee and cereal to chips and even water. But a new scientific review suggests that for many adults, especially those who are not physically active, consuming more protein than needed may offer little benefit and could even have pose unintended health consequences. Published in Cell Press Blue, the review analyzed more than 350 studies on restriction of protein, aging, metabolism, and longevity across humans and animal models. Researchers concluded that while protein remains essential in one's diet, most sedentary adults are likely consuming more than they need. It also found that bringing down excess protein intake may support healthier aging. “It’s absolutely crystal clear that there are benefits of protein to muscle growth and exercise response of active individuals,” said Dr. Dudley Lamming, aging researcher at the University of Wisconsin-Madison and the review’s corresponding author. “But because most people are relatively sedentary, many people are likely consuming more protein than they actually need, which probably has negative health consequences,” he added. Can Eating Less Protein Help? The researchers explain that eating less protein appears to activate several biological pathways that are associated to healthy aging. One key player is fibroblast growth factor 21 (FGF21), a hormone that rises when protein intake is reduced. Higher FGF21 levels have been associated with increased energy expenditure, better blood sugar control, lower inflammation, and healthier metabolism. Animal studies have also linked elevated FGF21 to longer lifespan. The review also highlights specific amino acids, including methionine, isoleucine, and valine, which may influence aging-related processes when consumed in excess. Restricting these amino acids appears to alleviate cellular stress and improve metabolic health in experimental studies.Also read: No Junk Food Near Schools! Maharashtra FDA Bans Sale Of Foods & Drinks High In Fat, Salt & Sugar Researchers caution that the findings do not mean everyone should start eating a low-protein diet. Protein requirements vary depending on age, activity level, health status, and life stage. Athletes, pregnant women, people recovering from illness or surgery, and many older adults often require more protein for muscle maintenance and recovery. “Recent recommendations have encouraged people to eat more protein, but they’ve also encouraged people to exercise more,” Lamming said. “We probably need to personalize protein recommendations based not just on age, but also on how physically active people are.” How Much Protein Do Adults Actually Need?       For healthy adults, the recommended dietary allowance is 0.8 grams of protein per kilogram of body weight daily. Although individual needs increase with regular exercise, aging, pregnancy, or certain medical conditions. Many adults already exceed these recommendations through regular meals alone, even before adding protein supplements. The researchers acknowledge that much of the evidence comes from animal studies, and long-term human trials are still limited. They say future research should determine exactly who benefits from lower protein intake and who needs more. As protein-fortified products continue to flood supermarket shelves, the researchers argue that dietary advice should become more personalized rather than assuming higher protein intake benefits everyone. 