Sorrel Health Benefits, Medicinal Properties, Side Effects & Hazards Sorrel Health Benefits Sorrel is a leafy green vegetable that looks a lot like spinach. This vegetable is native to Europe and is commonly known as spinach dock, sour grabs, or sour grass. One of the main ingredients in sorrel is oxalic acid, which gives it its acidity and prominent taste. Sorrel is extremely low in calories and high in water content, which makes it a healthy food choice for health conscious individuals. Some of the other important nutritional information and facts about sorrel are as under: It is an extremely rich source of vitamin A, B9, and C It is a good source of vital minerals such as potassium, magnesium, sodium, iron, and calcium Being rich in oxalic acid, sorrel may not be an ideal choice for everyone, especially those suffering from rheumatism, bladder, and kidney stones It contains powerful laxative properties and over consumption may result in diarrhea It is low in energy conten