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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 and/or minimal
health benefit. | |
Raspberry leaves have been used by herbalists to treat diarrhoea. In traditional herbalism and midwifery, red raspberry has been connected to female health, including pregnancy. It was considered a remedy for excessive menstrual flow (menorrhagia) and as a “partus prepartor,” or an agent used during pregnancy to help prevent complications.1
Raspberry leaves are high in tannins and like its relative, blackberry, may relieve acute diarrhoea.2 The constituents that affect the smooth muscles, such as in the uterus, have not yet been clearly identified. The German Commission E monograph has concluded there is insufficient proof to recommend red raspberry in modern herbal medicine.3
Traditionally, raspberry leaf tea is prepared by pouring 1 cup (250 ml) boiling water over 1–2 teaspoons (5–10 grams) of the herb and steeping for ten to fifteen minutes. Up to 6 cups (1500 ml) per day may be necessary for acute problems such as diarrhoea or sore throats due to a cold, while less (two to three cups [500–750 ml]) is used for preventive use during pregnancy. By itself, raspberry is usually not a sufficient treatment for diarrhoea. Tincture, 3/4–1 teaspoon (4–8 ml) three times per day, may also be taken.
Raspberry leaf may cause mild loosening of stools and nausea. Otherwise, use of the herb appears to be safe.
Are there any drug
interactions?
Certain medicines may interact with red raspberry. Refer to drug interactions for a list of those medicines.
1. Lust JB. The Herb Book. New York: Bantam Books, 1974, 328–9.
2. Tyler VE. Herbs of Choice: The Therapeutic Use of Phytomedicinals. Binghamton, NY: Pharmaceutical Products Press, 1994, 52, 139.
3. Blumenthal M, Busse WR, Goldberg A, et al. (eds). The Complete Commission E Monographs: Therapeutic Guide to Herbal Medicines. Boston, MA: Integrative Medicine Communications, 1998, 366.
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