Nutrition for Healthy Ageing

Ageing changes the maths of eating. Energy needs tend to fall while requirements for protein, calcium, vitamin D and B12 hold steady or rise, which means every meal has to do more nutritional work on a smaller appetite. At the same time, taste, thirst, dentition, medication and shopping logistics all shift. None of that is a reason for resignation: dietary quality in later life is one of the strongest levers available for preserving strength, independence and cognition. This guide sets out what actually changes and what to do about it, practically.

How the ageing body changes its nutritional needs.

From roughly the fourth decade onwards, adults lose muscle mass steadily, in the region of a few per cent per decade, accelerating after seventy and much faster during illness or bed rest. This process, sarcopenia, matters because muscle is not merely about strength: it is the body’s main store of amino acids, a major site of glucose disposal and the difference between rising from a chair unaided and not. Loss of muscle also lowers resting metabolic rate, which reduces energy needs and therefore appetite, while nutrient requirements stay put.

Several digestive and absorptive changes compound this. Stomach acid production commonly declines with age and with long-term use of proton pump inhibitors, and since acid is needed to release vitamin B12 from food proteins, absorption of food-bound B12 falls. Atrophic gastritis is common enough that fortified foods and supplements, where B12 is not protein-bound, become useful sources. Skin synthesis of vitamin D from sunlight also becomes markedly less efficient.

Appetite regulation itself shifts. Older adults tend to feel full sooner and stay full longer, a pattern sometimes called anorexia of ageing, driven by slower gastric emptying and altered gut hormone signalling. Combined with reduced taste and smell sensitivity, less dietary variety and often eating alone, the risk drifts towards under-nutrition rather than excess. That reframing is important: for many older adults the priority is nutrient density and adequate intake, not restriction.

Protein: more of it, spread more evenly.

The general adult reference intake of around 0.75g of protein per kilogram of body weight a day is widely considered too low for older adults. Expert consensus positions generally recommend around 1.0 to 1.2g per kilogram daily for healthy older adults, rising towards 1.2 to 1.5g during illness, recovery or rehabilitation, unless kidney disease dictates otherwise. For a 70kg person that is roughly 70 to 105g a day, which requires deliberate planning rather than luck.

Distribution is the most often missed part. Ageing muscle becomes less responsive to protein, a phenomenon described as anabolic resistance, so the threshold dose needed to trigger muscle protein synthesis rises to somewhere around 30 to 40g of quality protein per meal.

Typical British eating patterns deliver 10g at breakfast, 15g at lunch and 45g at dinner, which wastes much of the total. Rebalancing towards 25 to 35g at each of three meals is more effective than increasing the daily figure alone.

Concrete building blocks: 200g Greek yoghurt gives around 20g protein, two large eggs 13g, 250ml milk 8g, 100g cooked chicken or turkey 30g, a 140g tin of tuna or salmon around 28g, 150g cooked lentils 13g, 100g cottage cheese 12g, 30g cheddar 7.5g, and 40g of peanut butter 10g.

Milk powder stirred into porridge, soups and mash is a simple, low-volume way to lift protein when appetite is small. Protein works only alongside resistance exercise, so pair it with twice-weekly strength work.

Bones, muscles and the vitamin D question.

Bone is living tissue, remodelled continuously, and after the menopause the loss of oestrogen accelerates resorption sharply for several years. The UK reference nutrient intake for calcium is 700mg a day for adults, with higher targets often advised for those with osteoporosis. Useful contributions: 200ml milk gives about 240mg, 150g yoghurt about 200mg, 30g hard cheese about 220mg, a 100g portion of tinned sardines with bones about 500mg, 80g of cooked kale about 120mg, and calcium-fortified plant drinks are broadly comparable to dairy provided you shake the carton.

Vitamin D is the limiting factor for absorbing that calcium and also contributes to muscle function. Because skin synthesis is unreliable at UK latitudes between October and early spring, and less efficient with age, guidance recommends that everyone consider a daily 10 microgram supplement over the autumn and winter, and that people who are housebound, who cover their skin, or who have darker skin take one all year round. This is one of the few supplements with genuinely broad official backing.

Other nutrients support the same system. Vitamin K, abundant in leafy greens, is required for osteocalcin; magnesium from nuts, wholegrains and pulses participates in bone mineralisation; and adequate protein is a structural requirement for the collagen matrix. Excessive salt increases urinary calcium loss, and very high caffeine or alcohol intake is unhelpful. Anyone with a previous fragility fracture, a diagnosis of osteoporosis, or taking warfarin should discuss vitamin K and supplement choices with their GP or pharmacist.

Appetite, taste and eating when food seems less appealing.

Taste buds decline in number and sensitivity with age, and smell often fades earlier and further, which flattens flavour and can make previously loved meals seem bland. Many common medications add dry mouth, altered taste or nausea. The instinct is to add salt; a better route is to build flavour from herbs, spices, garlic, lemon, vinegar, mustard, smoked paprika, black pepper, tomato purée, miso and browning food properly through roasting or searing, all of which restore interest without pushing blood pressure up.

Texture and dentition deserve equal attention. Ill-fitting dentures, missing teeth and sore gums quietly narrow the diet, often eliminating meat, raw vegetables and fruit and with them protein, fibre and vitamin C. Softer nutrient-dense alternatives include minced and slow-cooked meats, fish, eggs, dhal, tinned pulses, stewed fruit, grated raw vegetables, smooth nut butters and full-fat yoghurt. Regular dental review is a nutrition intervention, not a cosmetic one.

When appetite is genuinely small, shift from volume to density. Offer smaller plates more often, five or six times a day rather than three. Fortify what is already being eaten: add butter or olive oil, grated cheese, cream, milk powder, ground almonds or an extra egg to soups, mash, porridge and puddings. Keep drinks until after eating so they do not displace food.

Seek prompt professional advice for unintentional weight loss, loose clothing or rings, difficulty or pain on swallowing, coughing while eating, or persistent loss of appetite, since these need assessment rather than home management.

Hydration, fibre and digestive comfort.

Thirst sensation blunts with age and the kidneys become less efficient at concentrating urine, so older adults can become dehydrated without feeling especially thirsty. Diuretics, laxatives and reluctance to drink because of continence worries all add to the risk, and dehydration presents in ways easily mistaken for something else: confusion, dizziness, falls, constipation, urinary infections and fatigue. A reasonable target is six to eight drinks a day, around 1.5 to 2 litres, adjusted upward in hot weather or illness.

All fluids count, including tea, coffee, milk, squash and soup, and the modest diuretic effect of caffeine does not cancel out the fluid in the cup. High-water foods such as melon, cucumber, tomatoes, yoghurt and jelly contribute usefully when drinking is a struggle. Practical prompts help more than reminders to try harder: a drink with every medication round, a jug within reach, a favourite cup, and a drink with every meal and snack.

Fibre remains important at around 30g a day, since constipation becomes more common with reduced activity, lower food intake and many medications. Introduce it gradually and always alongside fluid, because fibre without water can worsen the problem. Good sources at modest volumes include two tablespoons of ground flaxseed, a 40g bowl of porridge, wholemeal bread, stewed prunes, tinned pulses folded into soups and casseroles, and skins left on potatoes. Persistent constipation, diarrhoea, blood in stool, unexplained abdominal pain or a change in bowel habit lasting more than a few weeks warrants a GP appointment.

Shopping, cooking and eating well when cooking for one.

The practical barriers often outweigh the nutritional ones. Shopping becomes harder, cooking for one feels wasteful, and the effort of a full meal can seem out of proportion to the appetite for it. A well-stocked store cupboard solves most of this. Tinned fish, tinned pulses and tomatoes, frozen vegetables, frozen fish fillets, eggs, long-life milk, oats, wholemeal bread in the freezer, nuts, nut butter and jars of curry or pasta sauce make a dozen complete meals possible without a shopping trip.

Build a small repertoire of ten-minute, one-pan meals with a protein anchor. Scrambled eggs with tinned tomatoes on wholemeal toast. Tinned salmon stirred through pasta with frozen peas and a spoonful of crème fraîche. Dhal from red lentils with spinach and yoghurt. An omelette with grated cheese and a bag of salad. Baked potato with baked beans and cheese. Batch-cook casseroles and soups and freeze them in single portions, labelled, so a low-energy day still yields a proper meal.

The social dimension is not a soft extra: eating with others reliably increases how much and how well people eat. Lunch clubs, community cafés, shared meals with neighbours, a standing weekly meal with family, or even a phone call over dinner all help.

Online delivery, help with carrying shopping, and meal services are practical rather than defeatist. If appetite, weight, swallowing, mouth pain, or the ability to shop and cook is deteriorating, or if multiple medications are affecting eating, ask the GP for a nutritional assessment and a medication review, and request referral to a registered dietitian where needed.