Most health guidelines are built around the minimum protein needed to avoid deficiency, but emerging research suggests many people could benefit from aiming higher.
A new study argues that current public health recommendations for exercise and protein intake are largely aimed at preventing deficiency, not helping people achieve the best possible long-term health, independence, and quality of life.
The paper tackles several fundamental questions: How much protein do people really need? What types of exercise offer the greatest benefits? And what does the latest research show?
According to the author, Dr. Chris Macdonald, from the University of Cambridge, a growing body of evidence suggests 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. The evidence also suggests that combining aerobic activities such as walking, running, or cycling with resistance training may provide especially powerful benefits.
Dr. Macdonald states that physical activity should be viewed not only as a way to avoid disease, but also as a tool for maintaining strength, mobility, and independence throughout life.
Protein intake beyond minimum requirements
The review also looked at protein recommendations. Current UK guidelines are based primarily on preventing protein deficiency in sedentary adults.
However, the paper points to newer research suggesting that physically active people, older adults and pregnant women may benefit from significantly higher protein intake.
The review further highlights evidence that higher-protein diets can support fat loss (due to increased satiety and thermic effect), making them beneficial for body composition as well as overall health.
Importantly, the paper notes that higher protein consumption is not limited to meat-based diets.
With thoughtful meal planning, plant-based diets can also provide sufficient protein, as demonstrated by the growing number of vegan powerlifters and bodybuilders.
From minimum health to optimal health
Rather than replacing existing recommendations, Dr. Macdonald suggests supplementing them with guidance focused on what he calls "optimal health outcomes." He argues that people would benefit from clearer and more practical information about how exercise and nutrition can support long-term physical and cognitive performance.
Source: Frontiers in Nutrition, June 16, 2026.
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