Oxalis corniculata

Oxalis corniculata is traditionally used to treat fever, diarrhea, and skin conditions. It is also employed for wound healing and preventing scurvy due to its high vitamin C content. The herb's astringent properties help manage digestive issues like diarrhea. While these uses are well-documented in ethnobotanical texts, the clinical evidence level is currently rated C, indicating support primarily from in vitro and animal studies rather than large-scale human trials.

The medicinal action of Oxalis corniculata is attributed to its active compounds, including flavonoids, tannins, oxalic acid, and vitamin C. Tannins provide astringent effects useful for wound healing and diarrhea, while flavonoids offer anti-inflammatory and antioxidant benefits. The presence of vitamin C supports immune function and scurvy prevention. These mechanisms are supported by pharmacological studies (Evidence Level C), validating its traditional applications for infection and inflammation.

The standard adult dosage for Oxalis corniculata is 3 to 5 grams of fresh herb prepared as a tea, taken twice daily. This preparation is commonly used for managing fever and digestive complaints. Due to the presence of oxalic acid, users should adhere strictly to recommended amounts and avoid long-term use without professional guidance. Dosage adjustments may be necessary for specific conditions based on individual tolerance.

Oxalis corniculata is considered unsafe during pregnancy. The herb contains oxalic acid and compounds that may stimulate uterine contractions, posing a risk to fetal development. Additionally, the potential for kidney strain due to oxalate accumulation is a significant concern for pregnant individuals. Health practitioners strongly advise avoiding this herb while pregnant or breastfeeding. Safety evidence is rated Level C, based on pharmacological data and traditional contraindications.

Oxalis corniculata may interact with medications affecting the kidneys or mineral absorption. Because it contains oxalic acid, the herb can bind with calcium and other minerals, potentially reducing the efficacy of supplements or drugs requiring mineral co-factors. Patients taking diuretics or drugs for kidney conditions should avoid this herb due to the increased risk of kidney stone formation. Clinical interaction data is limited (Evidence Level C), so consulting a physician is recommended.

The primary side effect of Oxalis corniculata is the development of kidney stones with regular or excessive use. This is caused by high levels of oxalic acid, which can crystallize in the urinary tract. Individuals with existing kidney disease, kidney stones, or gout should strictly avoid this herb. While generally safe in small culinary or medicinal amounts for healthy adults, prolonged consumption increases the risk of renal damage and electrolyte imbalance.