Botanical Benefits Horsetail’s high content of silica gives this botanical its bone strengthening and repair properties. Silica is a mineral that promotes the body’s absorption of calcium needed for the repair of tissue and the formation of bone. The results from a preliminary study done in Italy on bone density supports the use of Horsetail for osteoporosis. Solomon Seal obtained its name 3500 years ago, when King Solomon recognized its numerous healing capabilities. Claims of it aiding in the restoration of damaged cartilage and connective tissue are far and wide. It’s anti-inflammatory action helps relieve discomfort associated with arthritis.