Scientists Say Most People Need More Protein Than Current Guidelines Suggest

New Research Calls for Revised Protein and Exercise Guidelines

A paper published in Frontiers in Nutrition contends that current public health recommendations for exercise and protein intake are largely focused on preventing deficiency, rather than helping people achieve the best possible long-term health, independence, and quality of life.

Author Dr. Chris Macdonald from the University of Cambridge points to a growing body of evidence suggesting that people may benefit from higher levels of physical activity and protein consumption than current guidelines typically recommend.

Exercise and Healthy Aging

The paper reviews research linking regular exercise to a wide range of health benefits, including a lower risk of death, better mental health, stronger cognitive function, and greater resistance to age-related decline. Evidence indicates that combining aerobic activities such as walking, running, or cycling with resistance training may provide especially powerful benefits.

Protein Intake Beyond Minimum Requirements

The review also examines protein recommendations. Current UK guidelines are based primarily on preventing protein deficiency in sedentary adults. However, newer research suggests that physically active people, older adults, and pregnant women may benefit from significantly higher protein intake. Higher-protein diets can support fat loss due to increased satiety and thermic effect. Importantly, the paper notes that higher protein consumption is not limited to meat-based diets; plant-based diets can also provide sufficient protein with thoughtful meal planning.

From Minimum Health to Optimal Health

Rather than replacing existing recommendations, Dr. Macdonald suggests supplementing them with guidance focused on "optimal health outcomes." He argues for a shift in societal perception: high-intensity exercise and high-protein diets are often associated with bodybuilders and superficial aesthetic goals, but they can also empower the general population to extend lifespan and healthspan. The goal is not just a "beach body" but the ability to remain strong, independent, and mentally sharp throughout life.