CogniMary side effects and cautions
No side-effect data was published for this product. That absence is not evidence of safety, so this page works from the ingredients instead.
CogniMary's label says do not use if pregnant or nursing, keep out of reach of children, and consult a healthcare provider before use.
The predictable issue from the panel is digestive: 250 mg of magnesium oxide is a common cause of loose stools. The interactions worth raising with a clinician are ginkgo with anticoagulants and antiplatelets, and berberine with a broad range of prescription medicines.
The label's own warnings
Transcribed exactly from the side panel of the bottle.
Warnings, as printed
“KEEP OUT OF REACH OF CHILDREN. Do not use if you are pregnant or nursing. As with any dietary supplement, consult with your healthcare provider before use. Safety sealed for your protection. DO NOT USE if safety seal is broken. Store in a cool, dry place.”
The pregnancy and nursing line is a prohibition rather than a caution, and it is the manufacturer's own. Nothing on this site softens it.
The safety-seal line is worth acting on rather than reading past. Check the seal before the first capsule. If it is broken, photograph it and contact the order desk the same day rather than taking anything.
The predictable one: magnesium
If this product disagrees with you, the magnesium row is the first place to look, and it is the only side effect on this label we would call likely rather than possible.
- 250 mg of supplemental magnesium sits under the 350 mg upper intake level that applies to magnesium from supplements, so the amount itself is not excessive.
- NIH names magnesium oxide among the forms most commonly associated with diarrhoea, nausea and abdominal cramping at high supplemental intakes.
- Other supplements stack with it. A multivitamin, a separate magnesium capsule, or a magnesium-containing antacid or laxative can push a daily total over the limit without anyone noticing.
- Taking the capsules with food rather than on an empty stomach is the simplest mitigation, and the label does not suggest it.
If it happens
Loose stools starting in the first week of a magnesium-containing supplement is a recognisable pattern. Taking it with a meal, or splitting the two capsules across the day, is worth trying before abandoning the bottle. If it persists, stop and talk to a clinician.
The interactions worth raising
Three ingredients on this panel have interaction profiles that a pharmacist would want to know about. The awkward part is that none of them has a disclosed amount.
| Ingredient | Why it comes up | Ceiling in this blend |
|---|---|---|
| Ginkgo biloba | Commonly flagged for people on anticoagulant or antiplatelet medication | 317.5 mg — the highest ceiling of the three |
| Berberine HCl | Interacts with a range of prescription medicines and is studied in people managing blood sugar | 105.8 mg |
| Green tea extract | EFSA found 800 mg a day of EGCG as a supplement raised liver enzymes; the EGCG amount here is not disclosed | 127 mg of extract, so at most about 64 mg EGCG |
Scroll this table sideways →
The ceilings above are the most each can weigh, derived on the ceiling page. They are upper bounds, not amounts, and that distinction is exactly what makes this conversation harder than it needs to be.
Take the panel with you
“A brain supplement” is not enough information for a pharmacist or a doctor to act on. A photograph of the Supplement Facts panel is. This site's transcription can be copied as text if that is easier to send.
Every caution on this panel, in one place
- Ginkgo biloba
- Has been associated with bleeding risk and is commonly flagged for people on anticoagulant or antiplatelet medication. Raise it with a clinician before you start.
- Green tea extract
- European regulators found that 800 mg a day of EGCG taken as a supplement raised liver enzymes. This label does not disclose how much EGCG is in the blend, which is precisely the problem.
- Berberine
- Studied mainly in people managing blood sugar, and known to interact with a range of prescription medicines. Not an ingredient to add quietly on top of a medication list.
- Magnesium
- 250 mg of supplemental magnesium sits under the 350 mg upper intake level for supplements, but magnesium oxide is one of the forms most likely to cause loose stools, and other supplements you take may already contain some.
- Folic acid
- 320 µg is well under the 1,000 µg upper intake level for adults. That limit exists because high folic acid intake can correct the blood picture of a vitamin B12 deficiency while the nerve damage continues underneath.
- Chromium picolinate
- 120 µg is roughly three and a half times the adequate intake. There is no established upper limit, which reflects a shortage of data rather than a demonstration of safety at any dose.
- Pregnancy and nursing
- The label says do not use. That is the label's instruction, not ours, and it is unambiguous.
None of those is a reason for most healthy adults to avoid this product. All of them are reasons to read the panel before adding it to anything else you take.
What has not been published
No adverse-event data, no tolerability data and no safety testing was supplied with this build. It is worth being precise about what that means.
It is not evidence of safety
A product with no reported side effects and a product with no side-effect monitoring look identical from the outside. Only one of them is reassuring.
Absence is not data
It is not unusual either
Most dietary supplements are sold without adverse-event publication. This product is not an outlier in the category; the category is the problem.
Common, not exceptional
It is why the panel matters
Where a product cannot show you safety data, the next best thing is a full ingredient disclosure. This label gives you four amounts out of fifteen.
The gap, again
If you experience anything you think is related to a supplement, you can report it to the FDA through MedWatch, and telling the seller as well is worth doing. Our desk is +1 (302) 200-3480 and [email protected].
Order CogniMary from the official website
Sixty capsules, thirty days, and a panel you can read before you buy. Start with one bottle so you can see the price and the guarantee term before you commit to six.
No price was published to this website. The figure is on the checkout page.
References
The sources behind the numbers on this page.
- NIH Office of Dietary SupplementsMagnesium — Health Professional Fact Sheet — ods.od.nih.gov · source
- NIH Office of Dietary SupplementsFolate — Health Professional Fact Sheet — ods.od.nih.gov · source
- NIH Office of Dietary SupplementsVitamin B12 — Health Professional Fact Sheet — ods.od.nih.gov · source
- NIH Office of Dietary SupplementsChromium — Health Professional Fact Sheet — ods.od.nih.gov · source
- European Food Safety Authority — 2018Scientific opinion on the safety of green tea catechins — EFSA Journal · DOI 10.2903/j.efsa.2018.5239 · source
- Alzheimer's Drug Discovery FoundationBerberine — Cognitive Vitality For Researchers — alzdiscovery.org · source
- U.S. Food and Drug AdministrationQuestions and Answers on Dietary Supplements — FDA.gov · source
What a side effect looks like versus a coincidence
Starting anything new makes people notice their body more, which is why the first week of a supplement generates more reported effects than any other.
Likely related
Starts within days of the first dose, is consistent rather than occasional, and resolves when you stop. Digestive effects from magnesium fit this pattern exactly.
The recognisable shape
Probably not related
Appears once, weeks in, and does not recur. A single bad afternoon in week three is a bad afternoon.
The usual case
Worth stopping for immediately
Anything sudden and severe, anything that looks like an allergic reaction, or anything involving unusual bruising or bleeding given the ginkgo.
Do not wait and see
Worth a conversation either way
Anything that starts after adding a supplement to a prescription medication. That is a pharmacist question and it is free to ask.
The one to raise
The honest test is stopping. If something stops when the capsules stop and returns when they restart, that is about as much evidence as anyone gets outside a trial.
In short
The label says do not use if pregnant or nursing and to keep it away from children. The likely side effect is digestive and the magnesium oxide is the likely cause. The interactions to name to a clinician are ginkgo, berberine and green tea extract, and the awkward part is that none of the three has a disclosed amount.
What to tell a pharmacist
If you take prescription medication and want to add this, here is the conversation in four sentences.
- “I want to start a cognitive-support supplement. Here is the Supplement Facts panel.”
- “It contains ginkgo biloba, berberine and green tea extract, and the amounts are not disclosed because they are inside a proprietary blend.”
- “It also has 250 mg of magnesium as the oxide and 320 micrograms of folic acid.”
- “Is there anything on my list that this should not go with?”
That takes ninety seconds, costs nothing, and is the single most useful thing on this page. The second sentence is the one that matters — a pharmacist needs to know the amounts are unavailable, because it changes how cautious the advice should be.