Red clover is a well-researched herb rich in isoflavones, which are plant estrogens that may benefit osteoporosis. Studies suggest that isoflavones may help improve bone mineral density in menopausal women. Additionally, red clover extract may help maintain arterial strength and flexibility, thereby protecting heart health. However, these studies mainly focus on red clover extract rather than the plant itself. Consult your doctor before using red clover, especially if you are taking blood thinners, pregnant, breastfeeding, or have been diagnosed with breast cancer. Possible side effects include rashes, nausea, and headaches.