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Benefits of Stinging Nettle Root

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Evidence-Based Benefits

  • SHBG binding — in vitro and animal studies show that nettle root lignans bind to sex hormone-binding globulin, potentially displacing testosterone and increasing the free (bioavailable) fraction; Schottner et al. (1997) identified the specific lignan compounds responsible for SHBG binding
  • BPH symptom relief — Safarinejad (2005) conducted a 6-month double-blind RCT in 620 men with BPH and found that 600mg nettle root extract daily significantly improved IPSS scores, urinary flow rate, and post-void residual volume compared to placebo
  • Prostate 5-alpha-reductase inhibition — nettle root contains beta-sitosterol and other phytosterols that inhibit 5-alpha-reductase in prostate tissue, reducing local DHT production
  • Anti-inflammatory properties — the extract inhibits aromatase and reduces inflammatory mediators in prostate tissue, including prostaglandin E2 and leukotriene B4
  • Combination therapy — Lopatkin et al. (2005) demonstrated that a fixed combination of saw palmetto 160mg + nettle root 120mg (PRO 160/120) was as effective as finasteride for BPH symptoms over 48 weeks

What the Research Says

Stinging nettle root has a well-established evidence base in European phytotherapy, where it is an approved treatment for BPH in Germany and Austria (Commission E monograph). Safarinejad (2005) published the largest randomized controlled trial, enrolling 620 men with BPH who received either 600mg nettle root extract or placebo daily for 6 months. The nettle group showed significant improvements in IPSS score (from 19.8 to 11.8 vs. 19.2 to 17.7 for placebo), maximum urinary flow rate, and post-void residual volume. Lopatkin et al. (2005) studied the fixed combination of saw palmetto 160mg + nettle root 120mg (PRO 160/120) in 257 men over 48 weeks and found it comparable to finasteride 5mg for IPSS improvement with fewer sexual side effects. The SHBG-binding mechanism was characterized by Schottner et al. (1997), who identified specific lignans (secoisolariciresinol and its derivatives) that compete with testosterone for SHBG binding sites in vitro.

Related Conditions

Prostate HealthLow Testosterone
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References

  1. (). Urtica dioica for treatment of benign prostatic hyperplasia: a prospective, randomized, double-blind, placebo-controlled, crossover study. Journal of Herbal Pharmacotherapy. DOI
  2. (). Long-term efficacy and safety of a combination of sabal and urtica extract for lower urinary tract symptoms — a placebo-controlled, double-blind, multicenter trial. World Journal of Urology. DOI
  3. (). Lignans from the roots of Urtica dioica and their metabolites bind to human sex hormone binding globulin (SHBG). Planta Medica. DOI