Official product information
Phytomem Side Effects: Ingredient Notes and Who Should Ask First
Quick answer
Possible Phytomem side effects come from its listed ingredients.
Berberine can upset the stomach and interact with many drugs, including diabetes drugs, and is not for pregnancy or breastfeeding. Saffron is unsafe at high doses, and xylitol is toxic to dogs.
If you take prescription drugs, ask a doctor first, and see who Phytomem is for.
Overview
What side effects can Phytomem cause?
Nobody has studied side effects of the Phytomem tablet itself, so the only guide is what is known about each ingredient on its own. The brand publishes no amounts and no label cautions, which means the risks below are possible, not measured for this product.
Six names appear on the brand graphic and four more on the info page. Both lists, and why they differ, are on the Phytomem ingredients page. We cover all ten here, since any of them may be in the tablet.
Berberine
Berberine: stomach upset, medicine interactions and pregnancy
Berberine carries the most safety notes of any ingredient on the list. It works on the gut, on blood sugar and on the liver enzymes that clear many common medicines.
| Concern | What is known | Source |
|---|---|---|
| Stomach and bowel | Stomach and bowel complaints are the side effects most often reported. | (NCCIH, berberine and weight loss) |
| Liver enzymes | 900 mg a day for 2 weeks slowed three enzymes (CYP2D6, CYP2C9, CYP3A4) that break down many prescription drugs, so those drugs could build up. | (Guo et al., 2012) |
| Diabetes medicine | Berberine can lower blood sugar. Goldenseal, a berberine herb, cut metformin levels by about 25% in healthy adults. | (NCCIH, diabetes and dietary supplements) (NCCIH, goldenseal) |
| Transplant drug | Known interaction with cyclosporine. | (NCCIH, berberine and weight loss) |
| Pregnancy and breastfeeding | May be unsafe; it can raise bilirubin, which can harm a baby's brain. | (MotherToBaby, berberine) (NCCIH, berberine and weight loss) |
| Newborns and infants | Likely unsafe; never give it to a baby. | (NCCIH, berberine and weight loss) |
| Liver injury | Rated an unlikely cause of liver injury at usual doses of 250 to 500 mg two or three times a day. | (LiverTox (NIDDK), berberine) |
Saffron
Saffron: safe in food amounts, not in large doses
Saffron in the small amounts used in cooking is considered safe. Trouble starts at doses far above anything a supplement tablet would hold.
- About 5 grams of saffron is linked to toxic effects, and about 20 grams is thought to be a deadly dose (Drugs.com, saffron monograph).
- At 5 grams or more, saffron can make the womb contract and may cause a miscarriage; saffron supplements should be avoided in pregnancy (Drugs.com, saffron monograph).
- People with kidney or bleeding problems should avoid high-dose saffron, and it may interact with some mental health medicines (MD Anderson, saffron).
For scale, memory trials used 30 mg of saffron extract a day (Ayati et al., 2020). Five grams is more than 160 times that amount.
Cinnamon banaba kudzu
Cinnamon, banaba and kudzu: blood sugar, kidney and liver notes
These three ingredients share one theme: blood sugar. Each has a smaller safety note of its own as well.
Low coumarin
Ceylon cinnamon has only trace amounts of coumarin, a compound that can be a problem for people with liver disease, while some cassia cinnamon is high in it (NCCIH, cinnamon). Taking herbs like cinnamon with diabetes medicine can cause unwanted effects (NCCIH, diabetes and dietary supplements).
One kidney case
It lowers blood sugar in small studies. One person with diabetes and weak kidneys, who was also taking a pain reliever, developed kidney injury and lactic acidosis (Zheng et al., 2010). Safety in pregnancy is unknown (Drugs.com, corosolic acid monograph).
Mixed evidence
Case reports link kudzu to liver and kidney problems. It may interact with tamoxifen, methotrexate and diabetes medicine, and people with hormone-sensitive cancer should avoid it (MSKCC, kudzu).
Banaba and kudzu appear only on the brand's info page, not on the bottle graphic. Without a full label, nobody can say whether they are in the tablet.
Others
Seaweed compounds, olive leaf, Morosil and xylitol
The remaining five names have fewer safety reports. That can mean they are gentle, or simply that less research exists.
| Ingredient | What to know | Source |
|---|---|---|
| Fucoxanthin | No safety problems showed up in blood or urine tests at 1 to 3 mg a day for 4 weeks. | (Hitoe and Shimoda, 2017) |
| Fucoidan | Well tolerated in small studies; it may slightly raise bleeding risk with blood thinners. | (Fitton et al., 2015) (ADDF Cognitive Vitality, fucoidan) |
| Olive leaf (oleuropein) | May modestly lower blood pressure, so it could add to blood pressure medicine. | (Ismail et al., 2021) |
| Morosil (red orange) | Its one weight trial was funded by the maker; we found no separate safety review. | (Briskey et al., 2022) |
| Xylitol | Bloating, nausea and loose stools at 35 to 50 g in one drink; a tablet likely holds far less, but the amount is not published. | (Storey et al., 2007) |
| Xylitol and dogs | Can cause a sudden, dangerous drop in a dog's blood sugar. Keep the bottle out of reach of pets. | (FDA, xylitol and dogs) |
Dose
Why the missing amounts matter for Phytomem safety
Most side effects depend on the dose, and the dose is the one thing the brand has not shared. That leaves two unknowns where a label would normally give answers.
| Ingredient | Dose linked to the notes above | Amount in one Phytomem tablet |
|---|---|---|
| Berberine | 900 mg a day slowed drug-clearing enzymes (Guo et al., 2012) | Not published |
| Saffron | About 5 g linked to toxic effects (Drugs.com, saffron monograph) | Not published |
| Xylitol | 35 to 50 g caused gut upset (Storey et al., 2007) | Not published |
| Cinnamon | Under 6 g a day appears to pose no risk (NCCIH, cinnamon) | Not published |
A small tablet cannot hold grams of saffron or xylitol, so those two limits are very unlikely to be reached. Berberine is different: each dose in its interaction study was 300 mg, an amount an ordinary tablet can hold, so treat the medicine warning as real.
Take one tablet a day and no more. Doubling up raises every unknown at once.
Who not
Who should not take Phytomem?
Some people should skip Phytomem, and others should wait for a doctor's go-ahead. The list comes from the ingredient sources above.
| Skip it | Ask a doctor first |
|---|---|
| Pregnant or trying to get pregnant | Anyone on diabetes medicine, including metformin |
| Breastfeeding | Anyone on blood thinners or blood pressure medicine |
| Under 18 | Anyone taking cyclosporine, tamoxifen or methotrexate |
| Hormone-sensitive cancer (kudzu) | Kidney, liver or bleeding disorders |
| Known allergy to any listed ingredient | Anyone on mental health medicine |
Memory changes that worry you or your family deserve a doctor visit before any supplement. Some causes, such as thyroid problems, vitamin shortfalls or medicine side effects, can be treated (NIA, memory problems and aging).
What to do
What to do if you get side effects
Mild stomach upset is the most likely problem, and it often settles when the tablet is taken with a meal. Anything more than that deserves a pause and a call.
Take it with food
The directions already say one tablet a day with food. Taking it on an empty stomach makes gut upset more likely.
Stop if it keeps up
If the upset lasts more than a few days, or anything new appears, stop taking the tablet and do not restart until you have spoken with a doctor.
Write it down
Note what you felt, when it started and what else you took that day, including other supplements and new medicines.
Call your doctor or pharmacist
Bring the bottle, or a photo of it, and this ingredient list. They can check it against your medicines.
Ask for your refund
Within 60 days of purchase you can return the bottles. The steps are on the Phytomem guarantee page.
Urgent
When to stop and call a doctor right away
Stop the tablet and get medical help the same day if you notice any of the signs below. Call 911 for trouble breathing, a swollen face or throat, or fainting.
- Yellow skin or yellow eyes, or very dark urine
- Much less urine than usual, or swelling in the legs or feet
- Shaking, sweating, sudden hunger or confusion, especially on diabetes medicine
- Deep, fast breathing with stomach pain and unusual tiredness
- Bruising or bleeding more easily, especially on a blood thinner
- Feeling faint or dizzy when you stand up
- A rash, hives or itching that spreads
For a longer checklist you can print, see our memory supplement safety checklist. For daily use, read how to take Phytomem.