Red raspberry's therapeutic uses

Definition: Natural plant product used to treat specific health conditions.

Principal proposed uses: None

Other proposed use: Prevention of complications of pregnancy

Overview

Herbalists have long believed that raspberry leaf tea, taken regularly during pregnancy, can prevent complications and make delivery easier. Raspberry has also been used to reduce excessive menstruation and relieve symptoms of diarrhea. However, there is limited evidence that it is safe or effective for these uses.

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Therapeutic Dosages

A typical dosage of raspberry leaf tea is made with 1 cup of boiling water poured over 1 or 2 teaspoons of dried leaf; the tea is steeped for ten minutes and then sweetened to taste. Unlike many medicinal herbs, raspberry leaf actually has a pleasant taste. Pregnant women may be advised to drink two to three cups of the tea daily.

Therapeutic Uses

Red raspberry tea is still commonly recommended for pregnant women. However, while there is weak preliminary evidence from animal studies that raspberry might have an effect on the uterus, clinical studies have only revealed vague and limited benefits during pregnancy. One double-blind, placebo-controlled study evaluated the effects of red raspberry in 192 pregnant women. Treatment (placebo or 2.4 grams of raspberry leaf daily) began at the thirty-second week of pregnancy and was continued until the onset of labor. The results failed to show any statistically meaningful differences between the groups. Red raspberry did not significantly shorten labor, reduce pain, or prevent complications. In the early 2020s, several studies were aggregated to examine the results of red raspberry on the uterus and in pregnant women. The results of this comprehensive overview did show red raspberry may shorten certain stages of labor. More human study is needed.

Safety Issues

Raspberry is believed to be safe. The double-blind, placebo-controlled trial above found no evidence of harm in the ninety-six pregnant women given red raspberry. However, this does not exclude the possibility of rare side effects or toxicity with excessive dosages. Safety in young children and in those with severe liver or kidney disease has also not been established.

Bibliography

Bowman, Rebekah, et al. “Biophysical Effects, Safety and Efficacy of Raspberry Leaf Use in Pregnancy: A Systematic Integrative Review.” BMC Complementary Medicine and Therapies, vol. 21, no. 1, 2021, pp. 56. doi:10.1186/s12906-021-03230-4.

Cathers, Mickie. “Raspberry Leaf for Pregnancy.” American Pharmacists Association, 7 Apr. 2023, pharmacist.com/Publications/Pharmacy-Today/Article/raspberry-leaf-for-pregnancy. Accessed 17 Aug. 2023.

Simpson, M., et al. “Raspberry Leaf in Pregnancy: Its Safety and Efficacy in Labor.” Journal of Midwifery and Women’s Health 46 (2001): 51-59.