At a glance
| Source | Arctostaphylos uva-ursi leaf |
| Key compounds | Arbutin and other hydroquinone derivatives |
| Amount in FemiCore | Not disclosed (part of 350 mg herbal blend) |
| Traditional use | Symptoms of mild recurrent lower urinary tract infections in women |
| Usage limit (EMA) | Not more than one week |
| Avoid in | Pregnancy, breastfeeding (not recommended), kidney disorders, under 18, men (not recommended) |
What it is
Bearberry, or uva ursi (“bear’s grape” in Latin), is a low evergreen shrub of the heath family, related to cranberries and blueberries. Its dried leaves have been used for centuries in European and North American folk medicine for urinary complaints and as a diuretic.
How it’s thought to work
Bearberry leaf contains arbutin. After it’s swallowed, arbutin is processed by the body and its breakdown products (hydroquinone derivatives) are excreted in urine, where they are believed to have antiseptic activity. This is the traditional rationale for its use in mild bladder infections.
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European Medicines Agency (EMA)
The EMA’s herbal monograph on bearberry leaf (the version we reviewed is marked “superseded”, so a newer revision may differ in detail) recognizes it as a traditional herbal medicine for the relief of symptoms of mild recurrent lower urinary tract infections such as burning sensation and frequent urination in women, after serious conditions have been excluded by a doctor. Its key conditions:
- Dose: extracts equivalent to 100–210 mg of hydroquinone derivatives (as anhydrous arbutin) per single dose, 2 to 4 times daily; or tea from 1.5–4 g of leaf, up to 8 g daily.
- Duration: not more than one week. If symptoms persist beyond four days or worsen, consult a doctor.
- Not recommended for men, or for children and adolescents under 18.
- Contraindicated in kidney disorders.
- Should be avoided in pregnancy; not recommended during breastfeeding.
- Possible side effects: nausea, vomiting, stomach ache; urine may turn greenish-brown.
LiverTox (U.S. NIH)
LiverTox describes uva ursi as used traditionally for urinary symptoms and as a diuretic, but notes no convincing medical evidence that it treats urinary tract infections or urinary symptoms. Side effects are uncommon at usual doses. At high doses it lists nausea, vomiting, ringing in the ears and shortness of breath, and, rarely, convulsions, delirium and cardiovascular collapse. LiverTox found no convincing cases of liver injury (likelihood score E).
Studied and traditional doses compared with FemiCore
The EMA single dose is based on 100–210 mg of arbutin-type compounds, not 100–210 mg of leaf. Bearberry leaf contains only a portion of arbutin by weight, so reaching that amount requires considerably more leaf or a concentrated extract. FemiCore’s bearberry shares 350 mg with three other herbs, so the arbutin dose per capsule is very likely well below a single traditional dose. That probably makes it safer, but also less likely to have the traditional effect.
The duration problem
FemiCore’s label suggests one capsule every day, with no time limit, and the 6-bottle package covers six months. European guidance for bearberry is one week. The likely low dose may reduce the concern, but long-term daily use of bearberry, even at low doses, has not been studied. Our suggestion: ask your doctor how long you should take a product containing bearberry before you commit to a multi-month package.
Who should avoid it
- Pregnant or breastfeeding women
- Anyone with kidney disease
- Under 18s
- Men (per EMA, not recommended; men with urinary symptoms should see a doctor)
- Anyone with symptoms of an active infection, who should see a clinician rather than self-treat
Bearberry and urine color
The EMA monograph notes that bearberry may turn urine greenish-brown. If you notice this, it is a known effect of the herb. Red or pink urine is different and may mean blood; see a doctor.
Role in FemiCore
Bearberry is the formula’s traditional urinary herb. In practical terms, its role is likely small given the blend size, but it carries the clearest regulatory caution of any ingredient.
Our assessment
| Question | Answer |
|---|---|
| Human evidence? | Traditional use; no convincing clinical proof (LiverTox) |
| Dose known? | No; probably well below traditional doses |
| Fits daily long-term use? | Not according to EU guidance (max one week) |
| Main caution | Pregnancy, kidneys, under 18, duration |
Bottom line
Bearberry is a respected traditional herb with clear usage limits. Its presence in a daily, open-ended supplement is the single most important thing to discuss with your doctor before trying FemiCore.
Frequently asked questions
What does bearberry do?
Bearberry leaf is traditionally used for symptoms of mild recurrent lower urinary tract infections in women. LiverTox notes there is no convincing medical evidence that it treats UTIs.
How long can you take bearberry?
The European herbal monograph says not more than one week. FemiCore’s label gives no limit, so ask your doctor.
Can bearberry change urine color?
Yes. It can turn urine greenish-brown, which is described as a harmless effect in the EMA monograph.
Is bearberry safe in pregnancy?
No. The EMA monograph says it should be avoided during pregnancy.
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Keep learning
*These statements have not been evaluated by the Food and Drug Administration. FemiCore is not intended to diagnose, treat, cure or prevent any disease. Information on this page is for education only. If you have bladder symptoms such as pain, blood in the urine, fever or sudden changes, see a health care professional.