Beta-sitosterol's therapeutic uses

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

PRINCIPAL PROPOSED USE: Benign prostatic hyperplasia

OTHER PROPOSED USES: Immune support, sports and fitness support, lower cholesterol, anti-inflammatory, antioxidant

Overview

Numerous plants contain cholesterol-like compounds called sitosterols and their close relatives, sitosterolins. A special mixture of these, beta-sitosterol, is used to treat benign prostatic hyperplasia (BPH). It may also be used for other conditions. 

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Therapeutic Uses

There are more useful herbal treatments for BPH than almost any other disease. Beta-sitosterol is a moderately well-documented treatment for BPH, joining saw palmetto, pygeum, nettle, and grass pollen.

Based on highly preliminary evidence, it has been suggested that sitosterols may also help strengthen the immune system. In particular, one study suggests that beta-sitosterol can help prevent the temporary immune weakness that typically occurs during recovery from endurance exercise and can lead to a post-race infection. Beta-sitosterol also appears to lower cholesterol levels by limiting the amount absorbed by the intestines.

Scientific Evidence

A review of the literature at the close of the twentieth century found four double-blind placebo-controlled studies on beta-sitosterol for BPH, enrolling 519 men. All but one of these studies found significant benefits in perceived symptoms and objective measurements, such as urine flow rate. A much larger study followed 200 men with BPH for six months. After the trial, many participants were followed for an additional year, during which the benefits continued. Similar results were seen in a six-month, double-blind trial of 177 individuals.

A review of modern studies in the early 2020s revealed that many researchers found evidence of various benefits of beta-sitosterol, such as lowering bad cholesterol and possibly decreasing the risk of heart attack, heart disease, and atherosclerosis.

Beta-sitosterol binds to prostate tissue and affects the metabolism of prostaglandins, substances found in the body that affect pain and inflammation. However, it is not clear whether this is the correct explanation for how beta-sitosterol might help in BPH.

Safety Issues

Although detailed safety studies have not been performed, beta-sitosterol is believed to be safe. No significant side effects or drug interactions have been reported.

Bibliography

"Beta-Sitosterol." Drugs.com, 22 May 2023, www.drugs.com/npp/beta-sitosterol.html. Accessed 15 Aug. 2023.

"Beta-Sitosterol - Health Information Library." PeaceHealth, 28 May 2015, www.peacehealth.org/medical-topics/id/hn-2806008#:~:text=In%20addition%20to%20improving%20lipid,modulating%2C%20liver%2Dprotective%2C%20and. Accessed 5 Sept. 2024.

Gupta, E. "β-Sitosterol: Predominant Phytosterol of Therapeutic Potential." In: Mishra, P., Mishra, R.R., Adetunji, C.O., editors. Innovations in Food Technology, 2020, doi.org/10.1007/978-981-15-6121-4‗32.

Wilt, T. J., R. MacDonald, and A. Ishani. "Beta-sitosterol for the Treatment of Benign Prostatic Hyperplasia." British Journal of Urology International, vol. 83, 1999, pp. 976-983.