The body changes that happen quietly after 70 — and how to stay ahead of them
After 70, the body changes in ways most people don’t notice until something quietly stops working. Five small shifts to watch — and what to do about each one.
The big changes — the things that get a name and a doctor’s visit — are easy enough to notice. It’s the quiet ones that catch most older Australians off guard.
The appetite that’s softened. The taste of food that’s not quite what it was. The walk back from the shops that’s a touch slower than it used to be.
None of these are a problem on their own. Together, paid attention to early, they’re the easiest set of things in life to stay ahead of.
Most age-related changes happen gradually. The earlier you notice them, the easier they are to manage.
Five quiet changes worth knowing about
1. Appetite softens. The body’s hunger signal becomes less urgent after 70. You’re not as hungry, you eat a bit less, and most of the time that’s exactly right. But the same drop in signal makes it harder to notice when you’re eating less than your body actually needs.
2. Taste and smell shift. About a quarter of people over 65 experience some loss of taste or smell. Food that used to be exciting becomes ordinary. The natural response is to cook less — which compounds the eating problem.
3. The body’s protein response weakens. Dietitians call this anabolic resistance. The body becomes slightly less efficient at turning protein into muscle. The practical implication: many older adults need more protein per kilo than they did at 30, not less.
4. Digestion slows. Constipation becomes more common. The gut becomes a little more sensitive to changes in fluid, fibre, and routine.
5. Thirst signals soften. The body becomes less efficient at telling you to drink water, while the kidneys become less efficient at conserving it.
None of this is dramatic. None of it is anything to feel pessimistic about.
It’s the normal physiology of being 70, 80 or 90 — and like most things about the body, it responds well to being noticed.
Ageing isn’t about avoiding change. It’s about recognising the changes early enough to stay one step ahead of them.
How to stay ahead of them
Two principles cover most of it.
First, eat with intent rather than habit. Habit will quietly let the changes accumulate. Intent — asking "is there protein here, is there fluid here, is there enough?" — keeps them in check.
Second, treat strength as the proxy for everything else. If you can carry the shopping, climb stairs, recover from a cold in a few days — the underlying systems are holding up. If those things have slipped noticeably in the last six to twelve months, that’s the signal that something else has shifted.
Three things to try this week
- For three days, notice the size of your meals. Are they smaller than they used to be? Are you skipping one occasionally?
- Aim for protein at every meal. Eggs, dairy, meat, fish, beans, nuts. Spread across the day works better than one big serve.
- If something feels different — appetite, taste, strength, recovery — mention it. To your GP or a dietitian. Not because something’s wrong, but because the early conversation is the easy one.
Staying strong at home
The body after 70 isn’t broken — it’s just running a different operating system than the one you had at 40.
The changes are quiet, but they’re not invisible. Paying attention to them is the first half of staying ahead.
Eating well enough to support them is the second half. Neither is hard. Both reward consistency.
Want to know if a daily nutrition top-up could help you stay strong at home?
There are three easy ways to find out — pick whichever suits you.
- Take the Eat Well Health nutrition screening questionnaire. A few quick questions about appetite, weight, and how you've been feeling lately.
It'll tell you whether a daily top-up is worth a conversation. No obligation. → Start the questionnaire
- Give us a ring. Have a chat with someone who knows this stuff — no script, no pressure. Call (08) 6119 3698, Monday to Friday.
- Ask us to call you back. A member of our team will get in touch. → Request a callback
Eat Well Health is a dietitian-backed service helping older Australians stay strong at home. For eligible Support at Home clients, the nutrition top-up is fully funded through your existing package.