Scurvy Grass Drug Interactions, Uses, Effectiveness, Safety & More

Scurvy grass (often identified as Cochlearia officinalis) is a low-growing plant in the cabbage and mustard family. It grows wild in coastal areas, salt marshes, and along roadsides across northern Europe and parts of the British Isles. Its name comes from its long history of use to prevent and treat scurvy, a disease caused by a lack of vitamin C.

In past centuries, sailors and people in cold regions ate the fresh leaves or drank the juice during long voyages and winters when fresh fruits and vegetables were scarce. Today it is mostly of historical and botanical interest, though some people still use it as a wild edible green, in herbal teas, or as a traditional tonic.

Scurvy grass naturally contains vitamin C (ascorbic acid), which the body needs to make collagen, heal wounds, and support the immune system. A lack of vitamin C causes scurvy, so eating a vitamin C–rich plant can correct or prevent that deficiency.

Being in the cabbage and mustard family, the plant also contains glucosinolates and related compounds that give it a sharp, peppery taste. In laboratory settings, these compounds are studied for possible antimicrobial and antioxidant activity. However, this is mostly test-tube and traditional evidence, and it does not prove the herb treats infections or disease in people.

As a wild leafy green eaten in food amounts, scurvy grass has a long history of use. However, there is little modern safety research on concentrated medicinal preparations such as tinctures or strong teas, so caution is sensible.

People who forage should be careful to correctly identify the plant and avoid harvesting from polluted areas, roadsides, or sites treated with chemicals, since plants can absorb contaminants. Those with allergies to plants in the cabbage/mustard family should be cautious.

Because safety data is limited, people who are pregnant or breastfeeding should avoid medicinal amounts. Children, older adults, and anyone with a chronic medical condition should talk to a pharmacist or doctor before using it. This is general information and not a substitute for personal medical advice.

When eaten in normal food amounts, scurvy grass is not known to cause major problems for most people. Because of its sharp, mustard-like compounds, large amounts could cause stomach upset, mouth or throat irritation, or heartburn in some people.

Allergic reactions are possible, especially in people sensitive to other plants in the cabbage and mustard family. Serious side effects have not been well documented, but the lack of reports may simply reflect how little it has been formally studied.

There is no established standardized dose for scurvy grass. Historically it was used as a fresh leafy green or its juice, in everyday food-like amounts, rather than measured medicinal doses.

If you use a commercial product such as a tea or tincture, follow the directions on the label and do not exceed the suggested amount. Because reliable dosing guidance does not exist, it is best to check with a pharmacist or doctor before using it regularly, especially in concentrated forms.