Horsetail (equisetum arvense)
It is true that Horsetail does not have the same allure in skincare as other popular herbal allies…but it is a wonderful herb for those who care about natural beauty. This heavy-duty herb is a great strengthener to hair and nails and is wonderful for treatment of dandruff. Horsetail has been known to be used as far back as the Ancient Greeks and they mainly used it for healing cuts and treating tuberculosis.
The extracts from the horsetail plant help stimulate the skin and the production of elastin and collagen and protect the skin from oxidation.
For more information on the uses of horsetail internally I really liked this site http://www.homeremediesweb.com/horsetail-health-benefits.php