Saw Palmetto: Medical Uses and Evidence

Overview of Saw Palmetto

Saw palmetto extracts have been utilized to address urinary symptoms associated with benign prostatic hyperplasia. Additionally, they are used for treating pelvic pain, migraines, and hair loss. This article explores the evidence supporting its current medical applications.

What is Saw Palmetto?

Saw palmetto (Serenoa repens) is a small palm tree native to the Southeastern United States. The primary active components of this plant are sterols and free fatty acids found in its berries. Saw palmetto extracts can be consumed in various forms, including tablets, capsules, ground and dried whole berries, liquid extracts, or tea. The most widely researched formulation is Permixon, which uses hexane as a solvent, while other variations may utilize ethanol, methanol, or liquid carbon dioxide.

Health Benefits and Mechanisms

Saw palmetto has been linked to several health benefits, such as its anti-inflammatory properties and its ability to inhibit the conversion of testosterone to dihydrotestosterone, a hormone that promotes male characteristics. Its effects are similar to those of finasteride (Proscar), a prescription medication used to reduce prostate size.

Saw Palmetto for Prostate Disorders

Research Findings

In 2011, the National Institutes of Health reviewed multiple studies on saw palmetto and found that it did not perform better than a placebo, even at doses up to three times the recommended amount. For example, saw palmetto did not demonstrate an impact on prostate-specific antigen (PSA) levels, a key marker for prostate health, including cancer screening. A study involving over 1,000 patients confirmed that saw palmetto did not lower PSA levels, whereas finasteride was shown to reduce PSA levels by 41%.

Evaluating BPH Treatments

Treatments for benign prostatic hyperplasia (BPH) are assessed based on their impact on various urinary symptoms, including decreased urine flow, post-void dribbling, overflow incontinence, and urinary retention. In 2002, a comprehensive analysis of 21 studies involving 3,139 men with an average age of 65 revealed that saw palmetto improved symptom scores and urinary flow measures more effectively than placebo. Additionally, it reduced nighttime urination symptoms by 25% compared to placebo.

Comparison with Finasteride

Two studies indicated that saw palmetto and finasteride had comparable effects in reducing urinary symptom scores and enhancing peak urine flow.

Saw Palmetto for Hair Loss

Effectiveness Studies

Several studies have investigated the efficacy of saw palmetto in reducing hair loss. One study involving 10 participants aged 23 to 64 reported a 60% improvement in hair growth after five months of supplementation. Another study with 50 participants taking saw palmetto daily for 24 months found that 38% experienced increased hair growth, particularly on the top of the head.

Combination Treatments

In a study with 62 participants divided into three groups, those using shampoo and lotion enriched with saw palmetto alongside a daily supplement showed a hair growth increase of 20% to 35%. Notably, the group taking both saw palmetto products experienced the most significant hair growth.

Safety of Saw Palmetto

Safety Profile

Most safety data regarding saw palmetto is derived from studies involving men, with limited information available about its effects on women and children. Generally, saw palmetto is considered well tolerated, though mild side effects such as digestive issues or headaches have been reported. It may also interact with certain medications, including hormone replacement therapies and blood thinners.

Conclusion

In summary, saw palmetto has shown potential in treating urinary symptoms related to BPH and hair loss, though its effectiveness can vary. Further research is needed to fully understand its benefits and safety profile across different demographics.

References

– Saw palmetto by the NIH: National Center for Complementary and Integrative Health. Last modified December 01, 2016.
– Saw Palmetto for Prostate Disorders. Gordon, A. and Shaughnessy, A. Am Fam Physician. 2003 Mar 15; 67(06):1281-1283.