Some Rausch products use a type of horsetail known as field or common horsetail (Equisetum arvense), also called candock, Dutch rushes, or paddock-pipes.
Other names include 'bottle-brush', 'pewterwort' and 'scouring rush', because this scratchy plant was used in the past to scour and clean pots and pans.
Common horsetail can be harvested between spring and autumn. Its roots grow up to 1.6 metres down into the soil, but are not used.
Common horsetail shoots are between 10 and 50 centimetres long, and grow to a diameter of between 1 and 5 millimetres.
It grows beside fields, roads and paths, on embankments and in graveyards.
In moist locations, common horsetail is easily confused with marsh horsetail (Equisetum palustre), which is said to be toxic due to its high alkaloid content. Unlike marsh horsetail, with common horsetail the lowest one of each set of side shoots is visibly longer than the others.
Due to the silicic acid it contains, common horsetail is used to treat kidney conditions, and in cosmetics.
The silicic acid eases problems with connective tissue, improves skin elasticity, is important for building new bones, is good for the teeth, and helps keep fingernails and toenails healthy. Common horsetail is a blood purifier, a diuretic and expectorant. It fortifies and strengthen tissues and much more. Horsetail is also used in the treatment of inflamed, blemished skin due to its astringent effect.
The plant can also be boiled up and then drunk as an infusion. This is particularly suitable for use with kidney and bladder ailments, cystitis, chronic liver inflammation, hair loss, as well as strengthen the lungs and in the prevention of cancer.
Despite its many positive properties, farmers consider common horsetail a harmful weed and apply pesticides in an attempt to eradicate it. Yet it seems impossible to completely remove common horsetail: if even the tiniest bit of root remains, the plant will soon grow back.