Yarrow is a flowering plant that has been used for centuries to treat a variety of ailments, including hair loss. The plant contains a number of compounds that are beneficial for hair health, including flavonoids, alkaloids, and tannins.
Flavonoids are antioxidants that help to protect hair from damage caused by free radicals. Free radicals are unstable molecules that can damage cells and DNA, and they are a major contributing factor to hair loss. Alkaloids are compounds that have a stimulating effect on the scalp, and they can help to promote hair growth. Tannins are astringents that help to tighten the hair follicles and reduce hair loss.