research Hair regenerative activities of flavonoid-rich extract of Equisetum hyemale L. (Equisetaceae) in chemically-induced alopecia in Sprague Dawley rats
This study found that a 2.5% flavonoid-rich extract of Equisetum hyemale promoted hair growth in a rat model of chemically-induced alopecia, showing results comparable to 5% minoxidil.

