According to a study in the International Journal of Endocrinology, nettle root’s molecular compounds may help regulate testosterone levels, which can help with improving erectile function and sperm production. In addition, nettle root may also help improve prostate health.
Another study published in Phytotherapy Research examined the effects of nettle root extract on 50 men suffering from symptoms of benign prostatic hyperplasia (BPH).
The results of this randomized controlled trial showed that a daily dose of 120mg per day over 6 months led to a significant reduction in maximum urine flow rate and bladder emptying time. It was concluded that the extract was beneficial for relieving BPH symptoms and may reduce the need for pharmaceutical intervention.
Additionally, research suggests that Horny goat weed may also have potential benefits for treating erectile dysfunction since it strengthens penile tissues, which increases their sensitivity during sexual intercourse as well as aiding recovery after strenuous activities such as exercise or sports.
Another study published by Korean researchers sought to examine the effects of eight weeks of supplementation with watermelon extract containing a high concentration of L-citrulline, though not solely citrulline itself. This time around, however, the study involved 51 participants between the ages of 19 – 74 suffering from ED caused by hypertension or diabetes mellitus.
Following the completion of the 8-week trial, researchers found that key ED symptoms had improved significantly more among those who took citrulline than those who took a placebo.