Preserving Your Cognitive Health as You Age: What Every Woman Should Know

By: Holly L. Thacker, MD • Posted on October 04, 2026

As we age, occasional forgetfulness or difficulty finding the right word can feel unsettling. While some degree of cognitive change is considered a normal part of aging, significant memory loss and impaired daily functioning are not. Fortunately, there are many proactive steps women can take to help support long-term brain health and potentially reduce their risk of cognitive decline.

Understanding the Stages of Cognitive Decline

Cognitive changes occur along a spectrum. Experts generally describe four stages:

1. No cognitive impairment with normal memory and thinking ability.
2. Subjective cognitive decline, where a person notices memory lapses or word-finding difficulties, but daily functioning remains intact.
3. Mild cognitive impairment (MCI), which involves measurable memory and thinking changes that may affect some tasks but do not result in loss of independence.
4. Dementia, where impairments in memory, language, judgment, and other thinking abilities interfere with daily life.

Many women experience subjective cognitive symptoms during midlife, particularly during the menopause transition. Brain fog, forgetfulness, and difficulty concentrating are common complaints. Research suggests that women may have greater cognitive reserve than men but may also experience a more rapid cognitive decline later in life. Hormonal changes, especially the loss of estrogen, may play a role.

When Memory Concerns Warrant Medical Attention

Occasional forgetfulness is common, especially during busy periods of life. However, memory concerns deserve medical evaluation when they begin to interfere with daily function.

Talk with your healthcare professional if you experience:

• Difficulty remembering recent events
• Frequent missed appointments or forgotten responsibilities
• Challenges managing medications or finances
• Increased dependence on reminders and prompts
• Declining work performance
• Poor judgment or loss of insight
• Behavioral changes such as unusual irritability, agitation, or suspiciousness
• Concerns raised by family members or coworkers

A thorough evaluation may include cognitive testing, laboratory studies, medication review, and potentially referral to a neurologist.

The Role of Estrogen in Women's Brain Health

Estrogen may provide important neuroprotective benefits. Research suggests that hormone therapy initiated within 10 years of menopause may help support brain health in appropriate candidates. Many women who experience menopausal brain fog report improvements in memory and word-finding ability after starting menopausal hormone therapy.

Women with certain genetic risk factors, particularly the APOE4 genotype, may face a higher risk of Alzheimer's disease and earlier onset of cognitive symptoms. Emerging research continues to investigate how hormones may influence outcomes in these higher-risk populations.

Vitamins and At-Home Treatments That Can Help

Cerefolin Brain Wellness, formerly available only by prescription as Cerefolin NAC, is a product designed to support individuals with mild cognitive impairment and contains:

• L-methylfolate (active folate)
• Methylcobalamin (active vitamin B12)
• N-acetylcysteine (NAC)

These nutrients support neurotransmitter production, brain metabolism, and antioxidant activity. According to the discussion, long-term clinical data and MRI research suggest potential benefits in slowing cognitive decline and supporting brain function when started early.

Individuals with MTHFR genetic variants may particularly benefit from active folate, as they may have difficulty converting standard folic acid into its biologically active form.

Vitamin B12: An Often Overlooked Nutrient

Vitamin B12 deficiency can contribute to neurologic symptoms, cognitive impairment, fatigue, and memory problems.

Certain groups are at increased risk for low B12 levels, including:

• Adults over age 65
• People taking metformin
• Long-term users of acid-suppressing medications
• Vegetarians and vegans
• Individuals with Crohn's disease or other gastrointestinal disorders
• People who have undergone intestinal surgery

Importantly, research suggests that neurologic symptoms may occur even when B12 levels fall into the low-normal laboratory range. Many clinicians prefer levels well above the minimum reference range to optimize neurologic function.

Omega-3 Fatty Acids and Brain Function

Omega-3 fats play an important role in brain structure and communication between nerve cells. Adequate intake may help support:

• Memory
• Concentration
• Mental clarity
• Healthy brain blood flow

Potential signs of omega-3 deficiency include:

• Brain fog
• Poor memory
• Difficulty concentrating
• Dry eyes
• Brittle nails
• Joint discomfort
• Sleep disturbances

Whenever possible, obtaining omega-3s through food sources such as fatty fish, flaxseed, chia seeds, walnuts, and seaweed is ideal. However, some individuals may require supplementation under medical supervision.

Magnesium: A Powerful Brain-Supporting Mineral

Magnesium is involved in more than 300 enzymatic reactions throughout the body and plays critical roles in:

• Energy production
• Nerve function
• Blood pressure regulation
• Blood sugar control
• Muscle function
• Bone health

Emerging research suggests higher magnesium intake may be associated with larger brain volumes and better cognitive function, particularly among women. Adults consuming more than 550 milligrams daily have been shown to have higher brain volumes than those consuming significantly less.

Magnesium-Rich Foods

Excellent dietary sources include:

• Pumpkin seeds
• Chia seeds
• Almonds
• Spinach
• Cashews
• Black beans
• Edamame
• Peanut butter
• Potatoes with skin
• Brown rice
• Yogurt
• Avocados

Unfortunately, many Americans fail to meet recommended magnesium intake levels. Low magnesium status may contribute to:

• Constipation
• Migraines
• Muscle cramps
• Insomnia
• Fatigue
• Numbness and tingling

Various forms of magnesium are available. Magnesium citrate, chloride, lactate, and aspartate may be absorbed more efficiently than magnesium oxide, though the latter can be particularly helpful for constipation.

Lifestyle Habits That Protect the Brain

Supplements alone are not enough. The most powerful protections for cognitive health involve daily lifestyle choices.

Follow a Brain-Healthy Eating Pattern

A Mediterranean-style or MIND diet rich in the following may help support healthy aging and cognitive function:

• Vegetables
• Fruits
• Beans
• Whole grains
• Olive oil
• Nuts and seeds
• Fish

Stay Physically Active

Regular physical activity remains one of the strongest strategies for reducing cognitive decline risk. Activities such as walking, strength training, tai chi, dancing, and other forms of movement help support blood flow and overall brain health.

Maintain Strong Social Connections

Social isolation is a modifiable risk factor for dementia. Maintaining relationships, participating in community activities, and staying engaged with friends and family can help stimulate multiple areas of the brain.

Keep Learning

Learning new skills challenges the brain and promotes cognitive resilience. Consider:

• Taking classes
• Learning a language
• Exploring new hobbies
• Volunteering
• Working beyond traditional retirement when appropriate
• Solving problems and engaging in critical thinking activities

The Bottom Line

While aging-related cognitive changes are common, significant cognitive decline is not inevitable. Supporting brain health requires a comprehensive approach that includes proper nutrition, adequate vitamin B12 and magnesium status, sufficient omega-3 intake, regular exercise, social engagement, lifelong learning, and addressing hormone and sleep concerns when appropriate.

The earlier these interventions begin, the better the opportunity to preserve cognitive function and maintain independence throughout life. As always, discuss any supplements or treatment strategies with your healthcare professional to determine what is appropriate for your individual needs.

Be Strong, Be Healthy, Be in Charge!
-Holly L. Thacker, MD

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