Review urges protein and exercise advice above minimum targets
A Cambridge-linked review says many adults may need more protein and activity than baseline guidance to preserve strength and independence with age.
By Tom Brennan · Health & Medicine Correspondent
3 min read
A new nutrition review argues that public health advice on protein and exercise should look beyond the minimum needed to avoid deficiency. The paper says higher protein intake and more physical activity may help people preserve strength, cognition and independence as they age.
The review, published in Frontiers in Nutrition, was written by Dr. Chris Macdonald, a fellow of Lucy Cavendish College at the University of Cambridge and director of the Better Protein Institute, according to Lucy Cavendish College. Macdonald says a growing body of research points to benefits from activity and protein levels above those reflected in many standard recommendations.
The paper focuses on what Macdonald calls “optimal health outcomes,” rather than thresholds designed for basic adequacy. Lucy Cavendish College said current public health guidance often emphasizes the least people need to prevent problems, while many people want clearer advice on staying strong, mobile and mentally sharp over a longer life.
Exercise and aging
Macdonald’s review says regular exercise is linked in research to a lower risk of death, better mental health, stronger cognitive function and greater resilience against age-related decline. The paper says a mix of aerobic exercise, such as walking, running or cycling, and resistance training may offer especially broad benefits.
The review frames physical activity as a way to maintain function, not only as a tool for preventing disease. According to Lucy Cavendish College, Macdonald argues that strength, mobility and independence should be central goals of exercise guidance for adults as they get older.
Protein above baseline levels
The paper also examines protein advice, particularly in the United Kingdom. According to the review, current UK recommendations are based largely on avoiding protein deficiency in sedentary adults, rather than on the needs of groups that may require more.
Macdonald points to research suggesting that physically active people, older adults and pregnant women may benefit from substantially higher protein intake than baseline guidance. The paper does not present protein as a meat-only issue; it says plant-based diets can meet protein needs with careful planning, and notes the presence of vegan strength athletes as an example.
The review also says higher-protein diets can help body composition by supporting fat loss. It attributes that effect to factors including increased fullness and the energy required to digest and process protein.
Guidance, not replacement
Macdonald does not call for discarding existing recommendations, according to Lucy Cavendish College. The paper instead proposes adding clearer advice for people seeking long-term physical and cognitive performance, alongside guidance designed to prevent deficiency.
The review also calls for a change in how higher-intensity exercise and higher-protein diets are discussed. Macdonald says those habits are often associated with bodybuilding or appearance goals, while the evidence reviewed in the paper supports their use for longer healthspan and day-to-day independence.
The paper’s central argument is that nutrition and activity guidance should help people build and maintain capacity over time. According to Macdonald, avoidable weakness and loss of independence should not be treated as unavoidable features of aging when lifestyle changes may reduce those risks.
This story draws on original reporting from ScienceDaily.