Forgetting where you parked is normal. Forgetting a conversation you had an hour ago, or asking the same question three times before lunch, may not be. The early signs of dementia are easy to wave away as tiredness or “just getting older,” and that habit of explaining them away is one of the main reasons the condition is so often diagnosed late.
A health explainer published in August 2026 by the US lifestyle site Bored Daddy set out 10 warning signs, drawing on guidance from the Alzheimer’s Association, the National Institute on Aging, the Mayo Clinic and the World Health Organization, along with nine habits linked to a lower risk.
The scale of the problem is large. The WHO estimated in its 2021 global status report that more than 55 million people were living with dementia worldwide, a figure it expects to reach 78 million by 2030.
Not one disease, and not a normal part of aging
Dementia is an umbrella term for a group of disorders that steadily erode memory, thinking and the ability to manage daily life. Alzheimer’s disease is the most common form.
It is far more common in older people, but medical bodies are clear that it is not an inevitable result of growing old. The WHO lists it among the leading causes of disability and dependency in later life.
The difficulty is that it creeps in. Early changes are mild, and families tend to notice them only in hindsight.
Early signs of dementia: memory, time and place
The sign most people expect is memory loss, and it is usually the first to show. The difference from ordinary forgetfulness is that it starts to get in the way of everyday life.
According to the Alzheimer’s Association, losing track of recently learned information is one of the earliest markers of Alzheimer’s. In practice that looks like forgetting recent conversations or major events, repeating questions, and leaning heavily on sticky notes or relatives to remember small things.
Closely related is confusion about time and place. A person may lose track of the day, struggle to tell what season it is, or feel disoriented inside their own home. Clinicians treat this kind of disorientation as a classic diagnostic feature.
A third clue sits in the junk drawer. Everyone mislays their keys. Someone in the early stages of dementia may put a phone in the freezer, be unable to retrace their steps to find something, and sometimes accuse others of taking it.
Planning, judgement and the senses
Dementia often hits the brain’s “executive” functions early. Following a familiar recipe, keeping up with monthly bills or sticking with a task done many times before can suddenly become hard.
Judgement can slip too. Bored Daddy’s list includes handing money to telemarketers, a sudden decline in personal grooming, and failing to spot danger, such as stepping into traffic or leaving a pan on the stove. These changes are generally tied to the brain’s frontal lobe.
Vision and spatial awareness can also be affected. The National Institute on Aging has found that problems judging distance, reading lines of text or recognizing familiar faces and places can appear relatively early in some forms of dementia. Misjudging distance is one reason driving becomes risky.
Words, moods and withdrawal
Language problems usually start small. A person may reach for a word and land on something close but wrong, such as calling a watch a “hand-clock,” or stop partway through a sentence. Group conversations, with several people talking at once, can become tiring and hard to follow, and simple questions may take noticeably longer to answer.
Personality can shift as well. The Mayo Clinic notes that dementia can change how a person regulates emotion. Signs can include new suspicion or paranoia, fast mood swings, irritability and fears that seem out of character.
Many people also pull back. They lose interest in hobbies, skip family gatherings and stop trying to follow games or group discussions. That can look like depression, but it may also be a response to the strain of struggling to keep up.
The habits linked to lower risk
The second half of the Bored Daddy piece lists nine habits researchers associate with a lower risk of Alzheimer’s and dementia:
- Stop smoking. The article cites research putting smokers at a 45% higher risk of Alzheimer’s than non-smokers.
- Keep moving. It recommends at least 30 minutes of exercise a day.
- Protect your head. Serious head injuries are linked to later dementia, so wear a helmet on a bike or motorcycle.
- Drink less alcohol. Heavy drinking harms normal brain function.
- Stay mentally busy. Reading, crosswords, sudoku and learning new skills.
- Rest and manage stress. Get enough sleep and avoid stress where you can.
- Watch vitamin B12. It points to Finnish research linking low B12 to dementia, with eggs, fish, seafood and meat as good sources.
- Check vitamin D. It cites a 2014 US study that tied deficiency to a 125% higher Alzheimer’s risk.
- Coffee. It claims regular coffee drinkers cut their Alzheimer’s risk by 50%.
Those last three deserve some caution. They are associations from individual studies, not proven causes, and none of them appears on the most authoritative list of risk factors.
That list comes from the Lancet Commission on dementia. Its 2024 report named 14 modifiable risk factors, including smoking, physical inactivity, excessive alcohol, head injury, high blood pressure, diabetes, hearing loss, social isolation, depression, untreated vision loss and high LDL cholesterol. The commission estimated that tackling all 14 could, in theory, prevent or delay about 45% of dementia cases worldwide. Four of the Bored Daddy habits overlap directly with that list.
Why an early check matters
There is no cure for most types of dementia. An early diagnosis still changes a lot. It opens the door to treatments that may slow symptoms, gives families time to plan while the person can still take part in decisions, and makes it possible to join clinical trials and support groups.
Anyone noticing several of these signs in themselves or a parent should book an appointment with a doctor.
The WHO’s own projection gives the urgency: by 2050, it expects 139 million people to be living with dementia.
