Brain Fog After Menopause: What Each Supplement Was Tested For, and Whether Women Past Menopause Were Included

Knowing what an ingredient was studied for is one question. Knowing who was studied is another. Here is that second answer, ingredient by ingredient.

It happens mid-sentence. You are telling a story you know perfectly well, and the word you need simply is not there. You talk around it, and the conversation moves on. You have probably not mentioned it to anyone.

You are far from the only one. And if you have started reading supplement labels, you may have wondered whether women past menopause were ever included in the research behind them. That is the question this page answers.

Further down, we look at two stimulant-free formulas built on ingredients from the table: CogniSurge and NeuroZoom — each with a money-back guarantee.

What Is Brain Fog Around Menopause?

The Menopause Society describes brain fog as difficulty remembering words, names, anecdotes and numbers, trouble focusing, and distractibility. It reports that 40% to 60% of midlife women notice cognitive symptoms such as forgetfulness during the menopause transition, and says the changes in cognitive performance are typically mild and within the limits of normal.

Cleveland Clinic explains that low estrogen can cause bouts of temporary brain fog that tend to affect verbal memory, like recalling words and names. One of its neurologists notes that menopause-related brain fog tends to stay stable or improve over time.

Hormones are not the only thread. A 2025 review in Post Reproductive Health links the menopause transition with hot flashes, disrupted sleep and changes in mood as well as brief dips in thinking.

Still in perimenopause? The Menopause Society says brain fog during perimenopause is very common, and that the changes are typically mild. The checks below apply to you just the same. The table is different: most of its “Yes” rows studied women already past menopause, and the creatine trial is the one that also enrolled women in perimenopause.

What Should You Check First?

Before any supplement, a few causes are worth ruling in or out. Several are easy to raise at a routine appointment.

• Sleep. The Menopause Society notes that up to 80% of women have hot flashes or night sweats at some point in the transition. The National Institute on Aging says a lack of quality sleep can lead to problems with memory.
• Thyroid. MedlinePlus lists being a woman and being older than 60 among the risk factors for an underactive thyroid, with symptoms that can include fatigue and depression. A TSH blood test is one of the tools used to check.
• Medicines. The National Institute on Aging lists medication side effects among the causes of memory problems. If you take several, our checklist for people on several medicines covers what to ask.
• Movement and routine. Cleveland Clinic’s women’s health experts suggest enough sleep, balanced meals, a regular exercise routine and less multitasking.

If the fog is worse after meals

Blood sugar is one more cause worth a quick check. The CDC estimates that 8 in 10 adults with prediabetes do not know they have it. Our guide to brain fog after eating covers the everyday steps and the test to ask about.

Is Hormone Therapy Worth Asking About?

It is a fair question for your doctor, because hormone therapy is a medical treatment and the decision belongs to you both; this page does not recommend for or against it. Here is what The Menopause Society’s 2022 position statement, published under its former name, The North American Menopause Society, says — so you can walk in informed.

It calls hormone therapy the most effective treatment for hot flashes and night sweats, and says its risks depend on the type, dose, how long it is used, how it is taken and when it is started — so treatment should be individualized. On thinking specifically, it states that in the absence of more definitive findings, hormone therapy is not recommended at any age to prevent or treat a decline in cognitive function.

If brain fog is part of a wider picture of menopause symptoms, talk with your doctor about the options.

Which Supplements Were Tested In Women Past Menopause?

Only some were, and the middle column shows which. It asks one question of the research we could find and verify: were women past menopause the people being studied? “Adults in general” does not mean an ingredient fails for women after menopause. It means the question has not yet been asked in that group specifically.

Every study is listed in References. Not a complete list of ingredients, and not medical advice.

Read across the rows and a pattern appears. The two ingredients with the most research in women past menopause, soy isoflavones and resveratrol, have mixed results even there. Ingredients often found in memory formulas — bacopa, lion’s mane, omega-3 and magnesium — have been studied mainly in mixed groups of adults, some of them on sleep or stress rather than memory.

Creatine is the exception worth a footnote: one small trial in women in or past menopause, and a memory result in older adults generally. Our MemoryFuel review covers that research in more detail.

Vitamin B12: a blood test before a bottle

B12 is the one row where a test can give a clear answer. The NIH Office of Dietary Supplements lists older adults, people with digestive conditions such as celiac or Crohn’s disease, people who have had gastrointestinal surgery, and people on vegetarian or vegan diets among those most likely to run low. Long-term use of metformin or acid-reducing proton pump inhibitors is another cause. Pernicious anemia, the most common cause of clear-cut deficiency, is more common in women.

Low B12 can cause fatigue, palpitations, and numbness or tingling in the hands and feet — and those nerve symptoms can appear without anemia. A serum or plasma B12 level is the usual test. We found no recent trial of B12 on thinking in women past menopause, so the table relies on the trials in older adults. Neither formula below names vitamin B12; our guide to vitamins for brain fog covers the tests to ask for.

Who Should Check Before Starting?

Several medicines are worth raising with a pharmacist before a brain formula. The ingredients named here appear in the two formulas below. Bring the label.

• Thyroid hormone, such as levothyroxine. A StatPearls review notes bacopa taken with thyroid hormone may lead to too much thyroid hormone. The FDA-approved levothyroxine label says not to take it within 4 hours of calcium or iron supplements — worth checking on any formula label that lists them.
• Osteoporosis tablets (bisphosphonates). The NIH Office of Dietary Supplements advises taking magnesium at least 2 hours before or after them.
• Cholinesterase inhibitors or heart-rate medicines. Memorial Sloan Kettering notes huperzine A may add to the side effects of cholinesterase inhibitors such as donepezil, and may lower heart rate with calcium channel blockers or beta blockers.
• Medicines broken down by liver enzymes. Memorial Sloan Kettering notes gotu kola inhibited several of these enzymes in lab studies, with clinical relevance not yet determined — a question for your pharmacist.

Never stop, reduce or change a prescription to make room for a supplement.

What Should You Look For Before You Buy?

If you have decided a formula is worth trying, these are the things to confirm before you order.

• Ingredients tested in women past menopause. The table above shows which studies included them, and which were tested only in adults in general.
• No stimulants, if sleep is part of the picture. Check the label for caffeine sources before you order.
• An amount for each ingredient, or a company that will tell you. It lets your doctor read the label against the research.
• A guarantee that covers several weeks. Most trials ran for weeks to months, so check the refund terms first.

Which Formulas Are Built On Ingredients From The Table?

If you have worked through the checks above and want to discuss a formula with your doctor, two on this site are built on ingredients from the table.

CogniSurge is a stimulant-free capsule built on bacopa and lion’s mane, with schisandra, gotu kola and shilajit alongside — a fit if you would rather avoid stimulants. NeuroZoom names DHA, magnesium and a broad base of vitamins and minerals among its 35 ingredients, alongside bacopa and huperzine A. Neither publishes the amount of each ingredient, which the full reviews explain.

Two formulas worth a closer look

Two formulas built on ingredients from the table

If you want to try a formula alongside your doctor’s advice, these two are made without stimulants and built on ingredients from the table — each with a money-back guarantee.

CogniSurge

Capsules

Two capsules a day with no stimulants, built on bacopa and lion’s mane — the two ingredients in it with human trials on memory and attention.

• Readers who want to avoid caffeine
• Anyone who wants a long refund window

Covered by a 365-day money-back guarantee

Before you start · Mention bacopa if you take thyroid medicine or a sedative.

See CogniSurge on the official siteRead our CogniSurge review

NeuroZoom

Capsules

A capsule that names DHA, magnesium and a broad vitamin and mineral base, plus bacopa and phosphatidylserine, with no stimulants.

• Readers who want vitamins, magnesium and memory nutrients in one capsule
• Once-a-day routines

Covered by a 60-day money-back guarantee

Before you start · Huperzine A matters with cholinesterase inhibitors and heart-rate medicines. If you already take a multivitamin, compare the two labels.

See NeuroZoom on the official siteRead our NeuroZoom review

Listed in no particular order. We publish no scores or rankings.

When Should You See A Doctor?

See your doctor if brain fog is getting worse rather than holding steady, if it is affecting your work or daily life, or if people close to you have noticed. Cleveland Clinic’s neurologist puts it simply: it is always OK to check with a health care provider if you are worried about your memory. The same appointment is a good time to ask about sleep, thyroid, medicines and your menopause options.

Ready to compare? Go back to the two formulas above, or read the full reviews of CogniSurge and NeuroZoom.