Protein intake may help older adults stay active and independent

Have you noticed that ordinary activities can gradually demand more effort as you get older? Unscrewing a stubborn jar, carrying bags of shopping, going up stairs or simply rising from a chair may no longer feel as easy as they once did.

Many people regard these shifts as an inevitable feature of ageing. Yet new research indicates that one straightforward factor could matter more than previously thought: protein.

A major study of almost 38,000 older people in 27 European countries identified a strong relationship between protein intake and remaining active and independent.

The results suggest that consuming sufficient protein could support muscle strength and physical function during ageing.

“Functional decline and sarcopenia are major aging-related concerns. While protein intake is known to influence muscle health, its longitudinal impact on strength and physical function across age and gender remains underexplored,” the authors write.

Muscle loss and independence

Muscle disappears from an ageing body much like money from a wallet: gradually at first, then faster than anticipated.

Clinicians refer to this progressive loss as sarcopenia, and its practical consequences are far from trivial. They include more falls and longer periods in hospital.

It can also mean a greater likelihood of entering long-term care, something few people expect or plan for.

Handgrip strength, assessed by squeezing a small device, is now among the most reliable straightforward measures of overall health in older adults. It may predict outcomes ranging from walking speed to long-term survival.

“Functional decline is multifactorial, involving musculoskeletal deterioration, neurological changes, and nutritional deficiencies,” the authors note.

Within this wider picture, protein supplies the building material the body needs each day to restore muscle that ageing continually breaks down.

Protein intake habits examined

The study used a long-running survey following tens of thousands of Europeans aged 50 and over.

Researchers assessed information gathered in 2019 and 2020, then compared it with follow-up data collected two years later. Their focus was on three basic questions.

In a typical week, how often do you consume dairy products? How often do you eat eggs or beans? And how often do you have meat, fish or chicken?

The responses were converted into one score ranging from 0 to 100. The lowest-scoring 10 per cent were classified as low-protein eaters.

Europeans often fell short on protein

Dairy dominated European diets. About 60 per cent of participants drank milk, ate cheese or consumed yoghurt every day.

Meat, fish or chicken appeared daily for roughly 30 per cent. Eggs and beans, more affordable but still valuable protein choices, were eaten every day by only around 10 per cent.

Education also influenced dietary habits. Spending more years in education was associated with eating beans, eggs and lean meats more frequently.

Low protein intake reduced strength

This is where the figures became striking. Men in the lowest protein category were 35 to 39 per cent more likely than men with better diets to have weak grip strength.

Among older women, risk rose by 21 per cent. Somewhat unexpectedly, younger women did not show a clear association on this individual measure.

Dr. Rizwan Qaisar, the study’s lead researcher, is a muscle scientist at the University of Sharjah.

“The findings showed that individuals with consistently low protein intake were more likely to report problems with walking short distances, climbing stairs, reaching overhead, or managing routine tasks such as shopping,” said Dr. Qaisar.

Everyday movement became more difficult

In every group included in the study, low protein intake was associated with greater difficulty walking 100 metres: approximately the distance from a parking space to a pharmacy counter, or from a bus stop to a clinic entrance.

Younger men in the low-protein group were 53 per cent more likely to struggle with this. For younger women, the figure was 51 per cent.

The increase among older adults was less pronounced, but remained real. The message may be modest, yet it is worth considering: a daily walk that many people scarcely notice was gradually becoming more difficult for those lacking protein.

“Simple movements such as walking, standing up, or carrying groceries require muscle strength, balance, and coordination,” noted Dr. Qaisar.

“When protein intake is low over long periods, the body may struggle to maintain these systems, increasing the risk of functional decline and loss of independence.”

Differences between women and men

The findings indicated that low protein intake created different difficulties for men and women.

Women in the low-protein category had the greatest trouble bending, kneeling and reaching overhead: everyday movements involved in dressing, emptying a dishwasher or taking a glass from a high shelf.

For men aged 50 to 65 in the low-protein group, the odds of having difficulty pushing or pulling large objects were 44 per cent higher. For men aged 66 and above, the odds were 21 per cent higher.

The researchers believe muscle mass may explain these differences.

Men begin with more muscle, meaning a loss of strength can appear sooner in a test. Women, who have less muscle in reserve, may reach their limit more quickly during activities requiring many muscle groups to work together.

Younger women experienced challenges

One finding was sufficiently striking that the researchers checked it again. Women aged 50 to 65 in the lowest protein category were more than twice as likely to experience difficulty using the toilet.

This same group was also 65 per cent more likely to find grocery shopping difficult.

These are not minor adjustments to daily life; they are the kinds of tasks that often determine whether an ageing adult can continue living independently.

Older adults need more protein

The biology behind these results challenges a common assumption. Older bodies need more protein than younger bodies, rather than less.

Current guidance recommends at least 0.8 grams of protein per kilogram of body weight daily for adults under 65, rising to around 1 gram per kilogram after 65.

There is a term for the reason behind this. Older muscle is less responsive to the amino acids entering the bloodstream after eating, an issue known as anabolic resistance.

To activate the muscle-building signals that younger bodies produce readily, an older body requires a stronger nutritional signal, chiefly from leucine, an important amino acid present in animal protein and certain beans.

Plant foods work and exercise helps

The results do not exclude plant-based diets. Combining beans, lentils, grains, dairy products and eggs over the course of a day can provide every amino acid the body requires.

Eating patterns such as the Mediterranean and Nordic diets have demonstrated this for decades. Combining protein with physical activity is equally important.

Strength training, even gentle options such as bodyweight squats or basic resistance bands, greatly improves how effectively dietary protein builds muscle.

The evidence indicates that protein and exercise work best together.

What to do at mealtimes

The practical advice arising from the research is simple enough to put into action this week. Distribute protein throughout the day rather than consuming most of it at dinner.

Make a protein-rich food the basis of breakfast. This is the meal at which most older adults do not consume enough.

Combine animal and plant sources to achieve both quality and variety. Pay attention to portion sizes, because appetite often declines with age despite the body’s continuing needs.

For women in their fifties and early sixties, the data deliver a particularly clear message: this stage of life is not too early to take protein seriously.