Shavegrass (Horsetail) Leaf, Equisetum arvens
Dried Shavegrass, also known as Horsetail. Possibly the most abundant source of silica. Used for polishing metal, in skin care products and shampoo.
It is contraindicated in those who have edema because of an impaired heart or kidney function. It should not to be used for more than six weeks at a time unless under the care of a professional since the herb may cause irritation of the digestive tract. It should not be confused with marsh horsetail (E. palustre), which is similar, but larger. This contains toxic alkaloids.