Some forgetfulness is a normal part of aging, and misplacing keys or blanking on someone’s name at a party does not, by itself, signal dementia. The line between “normal” and “worrying” is crossed when memory lapses start interfering with daily life: missed medications, bills paid twice or not at all, confusion in familiar places, or trouble following a conversation. If your mom’s forgetfulness has changed noticeably over recent months and is affecting how she manages her day, scheduling a medical evaluation is the single most important step you can take, because several causes of memory trouble are treatable or even reversible.
What Normal Age-Related Forgetting Looks Like
After about age 60, most people notice their memory is not what it used to be. It takes longer to learn new information, names slip away momentarily, and multitasking becomes harder. These changes happen because the brain’s processing speed declines and retrieving stored memories takes a bit more effort. The key distinction is that normal age-related forgetfulness is annoying but manageable. Your mom might forget where she left her reading glasses, but she knows what reading glasses are and what they’re for. She might need a moment to recall a neighbor’s name, but the name comes back eventually.
A concept clinicians use is mild cognitive impairment, or MCI, which sits between normal aging and dementia. In MCI, memory problems are measurably worse than expected for someone’s age and education, but the person can still handle most daily tasks independently. Research shows that people with MCI often begin losing awareness of their own memory difficulties as the condition progresses, which makes outside observation by family members especially valuable.
Signs That Warrant a Doctor’s Visit
There is no single symptom that definitively means dementia, but a cluster of changes should prompt action. The following patterns, especially when they’re new or worsening over weeks to months, deserve medical attention:
- Repeating questions: Asking the same thing multiple times in a short period, not just occasionally but as a pattern.
- Getting lost in familiar settings: Confusion while driving a well-known route or disorientation in her own neighborhood.
- Trouble with familiar tasks: Difficulty following a recipe she’s made for decades, struggling to manage a checkbook, or confusion with the TV remote she’s used for years.
- Personality or mood shifts: New anxiety, suspiciousness, withdrawal from social activities, or uncharacteristic irritability.
- Poor judgment: Falling for obvious scams, giving away large sums of money, or neglecting personal hygiene.
- Language problems: Struggling to find common words, not just proper nouns, or losing the thread of conversations.
None of these symptoms alone proves dementia. But if you are noticing several of them, or if even one is getting steadily worse, the right move is a medical evaluation rather than waiting to see if things improve on their own.
Treatable Causes to Rule Out First
Before assuming the worst, know that a significant number of memory complaints in older adults stem from causes that can be treated or reversed. A thorough evaluation should look for these before jumping to a dementia diagnosis.
Medications
Certain common drugs can fog thinking, and the risk goes up when someone is taking many medications at once. A class of drugs called anticholinergics deserves special attention. These include some older antidepressants, bladder medications for overactive bladder, certain antihistamines, and some sleep aids. A large study found that heavy use of anticholinergic drugs was linked to a roughly 50 percent increase in dementia risk, with bladder medications and antipsychotics carrying particularly strong associations.
Polypharmacy itself, meaning taking many medications simultaneously, is independently linked to memory complaints in older adults.
If your mom takes five or more daily medications, ask her doctor for a medication review. Sometimes reducing or switching a single drug can make a noticeable difference in mental clarity.
Nutritional Deficiencies
Vitamin B12 deficiency is a well-known and treatable cause of cognitive problems. B12 is essential for maintaining the protective coating around nerve fibers and for producing certain brain chemicals. When levels drop, the resulting damage can mimic early dementia. B12 deficiency is common in older adults because the stomach produces less of the acid needed to absorb it from food. A simple blood test can check levels, and supplementation through injections or high-dose oral tablets often improves symptoms if caught early enough.
Hearing Loss
This one surprises many families, but untreated hearing loss is now recognized as one of the most significant modifiable risk factors for dementia. When someone can’t hear well, they may seem confused or disengaged in conversations, which can look a lot like memory loss. Beyond the social masking effect, hearing impairment is associated with faster brain shrinkage in areas important for memory, including the hippocampus and temporal cortex, and with higher levels of tau protein, one of the hallmark markers of Alzheimer’s disease. Research in large cohorts has confirmed that poor hearing performance correlates with worse cognitive function and that brain atrophy partly explains this link. Getting your mom’s hearing tested is a cheap, low-risk step that could either identify a contributing factor or remove a red herring.
Depression, Sleep Problems, and Thyroid Issues
Depression in older adults often presents as memory trouble and apathy rather than obvious sadness, a pattern sometimes called “pseudodementia.” Chronic sleep disruption also matters: during deep sleep, the brain’s waste-clearance system flushes out toxic proteins, including amyloid-beta, and poor sleep accelerates the buildup of these proteins. Thyroid dysfunction, urinary tract infections (which can cause sudden confusion in older adults), and poorly controlled diabetes can all impair cognition too. Each of these is treatable, which is why a thorough medical workup matters so much before accepting a cognitive diagnosis.
What Happens During a Cognitive Evaluation
A first appointment typically involves a screening test that takes 10 to 30 minutes. The two most widely used are the Mini-Mental State Examination (MMSE) and the Montreal Cognitive Assessment (MoCA). Head-to-head comparisons consistently show that the MoCA does a better job catching mild cognitive impairment. One comparative study found that the MoCA had about 90 percent sensitivity for detecting cognitive impairment, compared to roughly 78 percent for the MMSE. A review of over 25 studies confirmed this pattern: the MoCA outperformed the MMSE in distinguishing people with MCI from those without it. One practical problem with the MMSE is a ceiling effect: many people with mild impairment still score near the top, making their difficulties invisible on paper. The MoCA avoids this problem more effectively.
If your mom’s doctor only uses the MMSE and the score comes back “normal,” but you still have concerns, it is entirely reasonable to request the MoCA or a referral to a neuropsychologist for more detailed testing. Education level affects scores on both tests, so good clinicians adjust the cutoff scores based on how many years of schooling someone completed.
Beyond the cognitive test itself, a standard workup typically includes blood tests (for thyroid function, B12, metabolic problems, and sometimes syphilis screening), a depression questionnaire, and sometimes brain imaging with MRI to look for strokes, tumors, or unusual patterns of brain shrinkage.
Newer Blood Tests for Alzheimer’s Disease
One of the most meaningful recent advances is the development of blood-based biomarkers that can detect Alzheimer’s-related brain changes years before symptoms become severe. The most promising of these measures a protein fragment called p-tau217. This marker reflects the buildup of amyloid plaques and tau tangles in the brain, the two defining features of Alzheimer’s disease. A systematic review and meta-analysis found that a plasma p-tau217 test achieved about 82 percent sensitivity and 86 percent specificity for detecting amyloid pathology, making it a reliable screening tool. Among the various phosphorylated tau markers studied, p-tau217 has emerged as the most accurate for identifying Alzheimer’s pathology early.
These blood tests are not yet universally available or covered by insurance, but they are rolling out in specialty clinics and are beginning to reshape how doctors approach early diagnosis. If your mom’s initial evaluation raises concerns, asking about p-tau217 testing is worth the conversation, especially if she would be a candidate for newer treatments that target amyloid.
If the Diagnosis Is MCI, What Happens Next
A diagnosis of mild cognitive impairment is not a death sentence for memory. MCI is a broad category, and outcomes vary widely. A large meta-analysis drawing on 89 studies found that in population-based settings, about 27 percent of people with MCI progressed to dementia over an average follow-up of around five years, while roughly half remained stable and about 28 percent actually reverted to normal cognition. In clinical settings, where patients tend to be sicker at baseline, conversion rates were higher, around 42 percent.
Reversion to normal cognition is real but comes with a caveat. One study tracking over 500 people with MCI found that 38 percent reverted to normal, but of those, 65 percent later developed MCI or dementia again. People who reverted still carried a substantially higher risk of future cognitive problems compared to people who never had MCI in the first place. This means that even if your mom’s memory seems to bounce back after an MCI diagnosis, continued monitoring is important.
Certain factors push the odds toward progression: the amnestic subtype of MCI (where memory loss is the primary complaint), involvement of multiple cognitive areas, carrying the APOE ε4 gene variant, and higher scores on clinical rating scales all reduce the likelihood of reversion and raise the chance of moving toward dementia.
The Role of Genetics
Alzheimer’s disease has a genetic component, and if your mom is affected, you may wonder about your own risk. The strongest known genetic risk factor for late-onset Alzheimer’s is the ε4 variant of the APOE gene. Carrying one copy of this variant increases risk moderately; carrying two copies makes a person roughly 15 times more likely to develop the disease compared to non-carriers. Research has also shown that the ε4 variant has an anticipatory effect, meaning that among people who do develop Alzheimer’s, carriers tend to develop it at a younger age than non-carriers.
That said, APOE ε4 is a risk factor, not a guarantee. Plenty of carriers never develop Alzheimer’s, and many people with Alzheimer’s do not carry the variant at all. Genetic testing for APOE is available and can be useful for research participation or treatment decisions (some of the newer drugs carry higher side-effect risks for ε4 carriers), but it is not routinely recommended for predicting whether you personally will develop the disease. A genetic counselor can help contextualize results if you decide to pursue testing.
What Actually Helps
Lifestyle Changes
A randomized controlled trial published in 2024 tested an intensive lifestyle intervention in people with MCI or early Alzheimer’s. Participants who adopted a program of regular exercise, a plant-based diet, stress management, and social support showed measurable improvement on several cognitive and functional scales after 20 weeks, while the control group worsened on all the same measures. The differences were statistically significant. This is one of the first randomized trials to show that lifestyle changes can actually improve, not just slow, cognitive decline in people who already have early symptoms.
This does not mean lifestyle changes are a cure. But the evidence increasingly suggests that physical activity, a healthy diet, social engagement, good sleep, and managing cardiovascular risk factors (like blood pressure and blood sugar) are among the most effective tools available, particularly in the early stages when there is still ground to be gained.
Medications
For Alzheimer’s specifically, a new class of drugs has arrived that targets the amyloid plaques thought to drive the disease. Lecanemab, the first of these to gain broad approval, showed a statistically significant slowing of cognitive decline in a large trial: at 18 months, the treatment group declined about 27 percent less than the placebo group on a standard clinical scale. A related drug, donanemab, showed similar results. These effects are real but modest. They do not stop or reverse the disease; they slow its trajectory by a small amount. Side effects are also a genuine concern. Roughly 13 percent of people receiving lecanemab developed brain swelling or tiny brain bleeds visible on MRI, and rates were higher with donanemab, around 24 percent. People who carry the APOE ε4 gene are at elevated risk for these side effects.
Older medications like donepezil (Aricept) and memantine are still prescribed. They work differently, boosting chemical signaling in the brain rather than targeting plaques. They provide modest symptomatic improvement for some people but do not alter the underlying disease course.
Racial and Cultural Disparities in Diagnosis
Dementia does not affect all communities equally, and the diagnostic process itself can introduce bias. Research has found that Black and Hispanic older adults are diagnosed with dementia at higher rates than white adults, but the reasons are layered. Some of the disparity reflects genuine differences in exposure to risk factors like cardiovascular disease, lower access to education, and social determinants of health. But part of it appears to stem from the diagnostic tools themselves. Standard cognitive tests were largely developed and validated in white, English-speaking populations, and people from different cultural or linguistic backgrounds may score lower for reasons that have nothing to do with actual cognitive impairment. Clinician bias, both conscious and unconscious, can also lead to overdiagnosis in some groups and underdiagnosis in others.
If your family comes from a background where English is a second language, where attitudes toward medical authority differ, or where cognitive decline is seen as a normal part of aging rather than a medical condition, it is worth seeking a provider who is culturally competent and ideally one who can administer testing in your mom’s dominant language.
Practical Steps You Can Take Now
While the medical side is being worked out, there are concrete things you can do that help regardless of what diagnosis, if any, eventually comes.
- Document what you see: Keep a brief log of concerning incidents with dates. Doctors rely heavily on caregiver observations because patients with early cognitive decline often underestimate their own difficulties.
- Review her medications: Bring every bottle and supplement to the appointment. Many drug interactions and anticholinergic side effects go unnoticed until someone looks at the full list.
- Check hearing and vision: Both untreated hearing loss and vision problems can mimic or worsen cognitive symptoms and are straightforward to address.
- Simplify daily systems: Pill organizers, calendar reminders, automatic bill pay, and labeled drawers reduce the cognitive load of daily life without requiring a diagnosis.
- Start legal conversations early: Powers of attorney, healthcare proxies, and financial plans are far easier to set up while your mom still has the capacity to participate in those decisions. Waiting until she cannot understand the documents makes the process legally and emotionally harder.
Looking After Yourself as the One Who Noticed
If you are the family member who first recognized that something was off, you are likely already carrying a weight that others in the family may not yet feel. Caregiving for someone with cognitive decline is one of the most stressful roles a person can take on. Research describes it as an “unexpected career” that brings real physical and emotional consequences, even though many caregivers also report finding meaning and emotional reward in the role.
Respite care, where another person or program takes over caregiving duties for a set period, is one of the most effective tools for sustaining a caregiver’s resilience over the long term. This does not mean you are failing or giving up. It means you are planning for a situation that may last years and pacing yourself accordingly. Local Area Agencies on Aging, the Alzheimer’s Association helpline, and adult day programs are practical starting points. Online and in-person support groups connect you with other people navigating the same territory, which can help counter the isolation that often comes with being a primary caregiver.
Your mom’s memory may or may not turn out to be something serious. But the single best thing you can do right now is exactly what you are already doing: paying attention, asking questions, and preparing to act on whatever the answers turn out to be.