These supplements are typically made from powdered root of marsh mallow, and they may also include powdered leaves. (herbazest.com)
This can be made by boiling one ounce (30 g) of powdered root in 10 ounces (300 mL) of water for 30 minutes, and is usually taken three times per day. (herbazest.com)
They are typically prepared from powdered root. (herbazest.com)