Red clover — plant hormones for menopause?

Aim of the study: To perform a meta-analysis examining the efficacy of phytoestrogens for the relief of menopausal symptoms.

Results: Of 543 potentially relevant studies identified, 15 RCTs meeting the inclusion criteria were included. The mean age of the subjects ranged from 49 to 58.3 and 48 to 60.1 years, respectively, in the placebo and phytoestrogen groups. The number of participants ranged from 30 to 252, and the intervention periods ranged from 3 to 12 months. Meta-analysis of the seven studies that reported KI data indicated no significant treatment effect of phytoestrogen as compared to placebo (pooled mean difference = 6.44, p = 0.110). Meta-analysis of the ten studies that reported hot flush data indicated that phytoestrogens result in a significantly greater reduction in hot flush frequency compared to placebo (pooled mean difference = 0.89, p < 0.005). Meta-analysis of the five studies that reported side-effect data showed no significant difference between the two groups (p = 0.175). Phytoestrogens appear to reduce the frequency of hot flushes in menopausal women, without serious side-effects.

Aim of the study: Menopause is characterized by a decline in estrogen levels, leading to symptoms such as vasomotor instability, osteoporosis, and increased cardiovascular and cognitive risk. Hormone replacement therapy (HRT) remains the gold standard for managing menopausal symptoms; however, concerns regarding its long-term safety, including elevated risks of cancer and cardiovascular events, have prompted interest in alternative therapies.

Results: At dietary levels, these compounds are generally safe, although high-dose supplementation is discouraged in individuals with hormone-sensitive cancers. Emerging evidence suggests lifelong consumption of soy-based foods may reduce cancer risk. In conclusion, daidzein and genistein represent promising, well-tolerated natural alternatives to conventional HRT, offering symptom relief and additional health benefits. Further research is warranted to optimize dosing, improve clinical outcomes, and clarify long-term safety in diverse populations, particularly with genetic variations in isoflavone metabolism.

Aim of the study: Menopausal symptoms such as hot flushes and night sweats can be very disrupting. While hormone replacement therapy is an effective therapy, concerns about side effects and breast cancer risk have stimulated interest into alternative therapies such as phytoestrogens.

Results: These are oestrogen-like compounds made by plants. Two major sources of phytoestrogens are soy and red clover. Data on randomised controlled trials of red clover for the control of menopausal symptoms are presented. The conflicting data are encouraging and suggest that phytoestrogens are a treatment modality that needs pursuing.

Aim of the study: Estrogen deficiency after menopause contributes to various neurological disorders, including stress, anxiety, depression, and memory impairment. Hormone replacement therapy (HRT) is commonly used to mitigate menopausal symptoms, but its use is associated with significant adverse effects.

Results: Significant changes in physiological, neurobehavioral, biochemical, molecular, and histopathological alterations in the brain hippocampal region were observed in OVX, CUMS, and OVX + CUMS group rats, indicating enhanced neuronal deficits compared with control group rats. Treatment with RC supplementation, 17-β estradiol (E2), and fluoxetine (Flx) significantly restored the pathological alterations caused by both CUMS and estrogen deficiency toward normal. E2 and Flx were included in the study to serve as established treatments for postmenopausal symptoms and stress-related disorders, providing a basis for comparison with RC. In conclusion, our study demonstrated the immense potential of RC in alleviating neurological disorders associated with estrogen deficiency and chronic stress.