Sheep sorrel is an extract from the leaves and stems of *Rumex acetosella*. You will often find it as one of four herbs in the classic Essiac formula.
Folk herbalism leans on sheep sorrel for its mild astringent and diuretic actions. People drink the tea or use tinctures to support digestion or encourage urine flow. These traditions rest on historical practice, not solid clinical trials.
A tea made with 1 to 2 teaspoons of dried herb per cup of hot water is common. Liquid extracts and powdered supplements are also available. Most people use it in cycles, following the directions on the label.
Sheep sorrel contains oxalates. If you are prone to kidney stones or have weak kidneys, talk to a healthcare professional before you start. No one has confirmed if it is safe during pregnancy or while breastfeeding.