Health Notes


Also indexed as:Geranium maculatum, Alum Root, Old Maid's Nightcap, Wild Geranium, Alum Bloom
Cranesbill: Main Image © Steven Foster
Botanical names:
Geranium maculatum


Cranesbill originated in North America and is sometimes grown ornamentally in a variety of flower colours. The root is primarily used in herbal medicine, but the above-ground part of the plant has also been used traditionally by herbalists.

  • Reliable and relatively consistent scientific data showing a substantial health benefit.
  • Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
  • For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support.

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This supplement has been used in connection with the following health conditions:

Clinically relevant conditions Dosage Indications
Canker Sores
Refer to label instructions 1 star [1 star]
Cranesbill is an astringent herb that can be used as a mouth rinse to soothe the pain of mouth ulcers. The herb contains tannins that can bind up fluids and possibly relieve inflammation.
Crohn’s Disease
Refer to label instructions 1 star [1 star]
Doctors sometimes recommend this astringent herb in combination with a few other herbs to sooth the digestive tract. Because it contains tannin, it may help decrease diarrhoea.
Refer to label instructions 1 star [1 star]
Cranesbill has been used by a few North American indigenous tribes to treat diarrhoea. The tannins in cranesbill likely account for the anti-diarrhoeal activity.
Refer to label instructions 1 star [1 star]
Astringent herbs such as cranesbill have been traditionally used for heavy menstruation.

Historical or Traditional Use

The Blackfoot Indians of North America used the root of cranesbill and closely related plants to stop bleeding.1 Cranesbill has also been used by other indigenous tribes of North America to treat diarrhoea.

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The information presented by TraceGains is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires December 2024.