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Sheep Sorrel

Sheep Sorrel

Common Names

  • Sorrel
  • Dock

For Patients & Caregivers

How It Works Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.

There is no evidence that sheep sorrel can treat cancer, diarrhea, scurvy, or any other medical condition.

No scientific research has been performed with sheep sorrel, but scientists are familiar with how some of the natural compounds found in this plant work. The anthraquinones stimulate peristalsis in the gastrointestinal tract and increase the secretion of mucous and water into the intestine. This can cause a laxative effect. These compounds are also considered to be antioxidants and therefore may be able to neutralize free radicals, which can cause cellular and DNA damage in the body.

Purported Uses Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.
  • To treat cancer
    No scientific evidence supports this use.
  • To treat diarrhea
    There are no data to back this claim.
  • To reduce fever
    No scientific evidence supports this use.
  • To reduce inflammation
    This use is not supported by research.
  • To treat scurvy
    Sheep sorrel contains vitamin C, which helps prevent scurvy, but there are no human data.
Patient Warnings Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.
  • Large doses of sheep sorrel may result in diarrhea, and cause kidney and liver damage.
Do Not Take If Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.
  • You have a history of kidney stones
  • You are taking diuretics: Most diuretics cause potassium loss from the body, which can be increased by the laxative effect of sheep sorrel. This increases the risk of hypokalemia, or dangerously low blood potassium levels.
Side Effects Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.
  • Upset stomach
  • Abdominal cramps
  • Diarrhea, possibly leading to dangerously low blood potassium levels
  • Kidney and liver damage
Special Point Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.
  • Sheep sorrel is one of the four ingredients in Essiac.
  • Anthraquinones can cause discoloration of the urine interfering with urinalysis.
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For Healthcare Professionals

Scientific Name Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.
Rumex acetosella
Clinical Summary Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.

Derived from the aerial parts of the plant, sheep sorrel historically has been used to treat inflammation, scurvy, cancer, and diarrhea. It is also one of the four ingredients in Essiac (1).

The major constituents of sheep sorrel include anthraquinones, oxalates, and various vitamins (1).

There are no published trials evaluating the efficacy of sheep sorrel for any proposed claims.

Consumption of large doses may result in diarrhea from the anthraquinones and renal and liver damage from the oxalate content (2).

Purported Uses Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.
  • Cancer treatment
  • Diarrhea
  • Fever
  • Inflammation
  • Scurvy
Mechanism of Action Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.

The anthraquinones, including emodin, rhein, and physcion, stimulate peristalsis and increase the secretion of mucous and water into the intestine. They are also considered to be antioxidants and free radical scavengers. (1)

Contraindications Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.

Patients with history of kidney stones should not consume this herb.

Adverse Reactions Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.

Reported: Gastroenteritis, abdominal cramps, diarrhea leading to possible hypokalemia, renal and liver damage (2).

Herb-Drug Interactions Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.

Diuretics: Potassium loss due to stimulant laxative effect can increase potential risk for hypokalemia.

Herb Lab Interactions Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.

Anthraquinones can cause discoloration of the urine interfering with urinalysis (3).

References Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.

  1. Fetrow CW, et al. Professional’s Handbook of Complementary and Alternative Medicines. Philadelphia: Springhouse; 1999.

  2. Newall CA, et al. Herbal medicines: a guide for health-care professionals. Pharmaceutical Press. London. 1996.

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