Memory changes with age in ways that are ordinary and well described. Recall gets slower — the name arrives ten minutes after the person leaves. Doing two demanding things at once gets harder. None of that, on its own, is a warning sign, and treating it as one causes a great deal of unnecessary fear.
The distinction that actually matters
Clinicians tend to ask less about whether something was forgotten and more about what was lost. Misplacing your keys is ordinary. Not recognising what the keys are for is not. Forgetting a name is ordinary; forgetting an entire conversation you had this morning, repeatedly, is worth a doctor's time. The pattern matters more than the incident.
Attention is often the real culprit
A large share of everyday "memory problems" are attention problems. Nothing was forgotten because nothing was ever encoded — the phone was in hand, the radio was on, the name went in as noise. Poor sleep, untreated pain and doing everything in a hurry all produce a convincing imitation of a failing memory.
The things with real evidence behind them
Regular physical activity has the most consistent evidence of anything studied for cognition with age. Sleep matters because consolidation happens there. Hearing loss is worth taking seriously: when following a conversation takes all your effort, less of it is available for remembering what was said. Staying socially and mentally engaged is associated with better outcomes, and it is the part people quietly drop first.
What to be careful about
Plenty of things are sold for memory. Very few have evidence that would satisfy a sceptical doctor, and supplements are not a substitute for treating the boring causes — sleep, hearing, blood pressure, mood, medication side effects. Ask what a product is claiming and what would have to be true for the claim to hold.
When to stop wondering and ask
Changes that family notice before you do, difficulty with familiar tasks, getting lost somewhere well known, word-finding trouble that interrupts sentences, or a change that has clearly progressed over months — those deserve an appointment rather than a search engine. Many causes of memory trouble are treatable, and some of the treatable ones look exactly like the ones that are not.
Ageing changes how quickly you retrieve things. It should not change whether you can hold on to your own day.