Quick Summary

Purslane (Portulaca oleracea) is an edible plant traditionally used in various medical systems for inflammatory conditions, metabolic disorders such as diabetes, improving lipid profiles, modulating blood pressure, and supporting skin health. Recent clinical evidence from randomized controlled trials (RCTs) and meta-analyses suggests it may modestly reduce fasting blood glucose, improve lipid profiles, lower systolic blood pressure, and enhance skin barrier function in conditions like atopic dermatitis. It also shows potential in modulating inflammation and oxidative stress related to diabetes. However, most evidence is of low to moderate quality, and more rigorous studies are needed to confirm these findings and establish safety.

What is it?

Purslane is a fast-growing, succulent leafy plant commonly consumed as a vegetable or used as a traditional herbal remedy. It is found worldwide and is recognized for its nutritional content including omega-3 fatty acids, vitamins, and minerals. Its botanical name is Portulaca oleracea.

Traditional Uses

  • Management of inflammatory diseases
  • Support for metabolic disorders such as diabetes
  • Improvement of lipid profiles and cardiovascular health
  • Blood pressure regulation
  • Skin health enhancement, including treatment of dermatitis

Active Compounds

Purslane contains diverse bioactive compounds including omega-3 fatty acids (alpha-linolenic acid), flavonoids, alkaloids, vitamins (A, C, E), minerals, and antioxidants. These constituents are thought to contribute to its potential health effects, particularly its anti-inflammatory and antioxidant properties.

Potential Benefits with Evidence Levels

  • Glycemic control in type 2 diabetes mellitus (Moderate evidence): Several systematic reviews and meta-analyses of RCTs indicate that purslane supplementation may significantly reduce fasting blood glucose by approximately 6 to 15 mg/dL, though effects on insulin levels, HbA1c, and insulin resistance measures are not significant.
  • Improvement in lipid profile (Moderate evidence): Evidence suggests purslane may reduce total cholesterol, triglycerides, LDL cholesterol, and C-reactive protein while increasing HDL cholesterol, indicating a favorable impact on cardiovascular risk markers.
  • Blood pressure reduction (Moderate to Low evidence): Meta-analyses of RCTs report a modest reduction in systolic blood pressure (~3 mmHg) with inconsistent effects on diastolic pressure; some subgroups such as older adults and individuals with diabetes may benefit over a 12-week period.
  • Anti-inflammatory and antioxidant effects in diabetes (Low to Moderate evidence): Clinical trials show reductions in inflammatory markers such as NF-κB and C-reactive protein, but effects on oxidative stress markers (MDA, TAC) are inconclusive in humans despite positive findings in animal studies.
  • Atopic dermatitis symptom relief and skin barrier restoration (Low to Moderate evidence): Topical application of aqueous purslane extract improved skin inflammation and barrier function in animal models, potentially by inhibiting JAK1 and related signaling pathways.
  • Anthropometric parameters (body weight and BMI) (Low to Moderate evidence): Some systematic review data indicate purslane may modestly reduce body weight and BMI, but evidence is limited and variable.

Side Effects

Purslane has generally been well tolerated in short-term clinical settings. Minimal adverse effects have been reported in the available RCTs and meta-analyses. No significant specific adverse events have been consistently associated with purslane supplementation.

Drug Interactions

Currently, there is insufficient data on drug interactions with purslane. No clinically significant interactions have been documented in the reviewed clinical literature. Caution and consultation with a healthcare provider are advisable when combining purslane with other medications.

Who Should Avoid It

Due to limited safety data, purslane use during pregnancy and breastfeeding is not well studied, and caution is recommended. No specific contraindications have been established, but individuals with known allergies to related plants or those on medication should consult a healthcare professional before use. Further safety data are needed.

Evidence Limitations

Most clinical evidence for purslane’s effects comes from small to moderate-size randomized controlled trials with variable quality. Limitations include heterogeneity in dosages and formulations used, short durations of follow-up, and incomplete adverse event reporting. Long-term efficacy and safety remain uncertain. Larger, well-designed clinical trials are required to better establish therapeutic potential and safety.

References

Last Reviewed

April 2024

Disclaimer

This information is for educational purposes and does not constitute medical advice. Please consult a healthcare professional before using purslane or any herbal supplements, especially if you have pre-existing health conditions or are taking medications. The effects of purslane are not guaranteed and more research is needed to fully understand its benefits and risks.