Purslane (Portulaca oleracea) is an edible succulent plant that grows wild across most of the world, often dismissed as a garden weed in North America. It has thick, fleshy leaves with a mild, tangy flavor and a satisfying crunch. Despite its reputation as a nuisance, purslane has been eaten as food and used as medicine for more than 4,000 years and remains a common ingredient in Latin American, European, Asian, and Mediterranean cooking.
What makes purslane unusual among leafy greens is its nutritional density. It contains more omega-3 fatty acids than any other known leafy vegetable, along with significant amounts of vitamins A, C, and E.
How to Identify Purslane
Purslane grows low to the ground in a spreading, mat-like pattern. Its stems are fleshy and smooth, often reddish-purple in color, and can grow as thick as your pinky finger in good soil. The leaves are small, club-shaped, and succulent, with smooth edges and a light green color. They cluster together at the joints where stems meet. When the plant flowers, it produces small yellow blooms.
One important detail for foragers: purslane has a toxic look-alike called spurge. The two plants grow in similar conditions and share a low, spreading habit, but they’re easy to tell apart once you know what to look for. Break a stem. If the sap is clear and watery, it’s purslane. If a milky white drop forms immediately, it’s spurge, and you should avoid touching that sap since it can blister your skin.
Beyond the sap test, the differences are consistent:
- Stems: Purslane stems are thick, fleshy, and hairless. Spurge stems are thin (no thicker than a toothpick) and covered in fine hairs.
- Leaves: Purslane leaves are smooth-edged, fleshy, and light green. Spurge leaves are paper-thin, darker green, and have serrated edges. Spotted spurge also has a dark purple blotch in the center of each leaf.
- Flowers: Purslane flowers are yellow. Spurge flowers are white to pinkish.
Omega-3 Content Sets It Apart
Purslane’s standout nutritional feature is its omega-3 fatty acid content. A 100-gram serving of fresh leaves (roughly one cup) provides 300 to 400 milligrams of alpha-linolenic acid, the plant-based form of omega-3. That’s more than spinach and more than any other leafy green that’s been measured. For context, most people get their plant-based omega-3s from foods like flaxseed and walnuts, so a common “weed” delivering this much is genuinely unusual.
Alpha-linolenic acid plays a role in reducing inflammation and supporting heart health. Your body can convert small amounts of it into the longer-chain omega-3s found in fish oil, though the conversion rate is low. Still, for people who eat little or no fish, purslane is a meaningful dietary source.
Vitamins and Antioxidants
A 100-gram serving of fresh purslane provides about 1,320 IU of vitamin A (44% of the recommended daily allowance) and 21 mg of vitamin C (35% of the RDA). It also contains 22.2 mg of vitamin E per 100 grams, which is exceptionally high for a leafy green. Vitamin E functions as an antioxidant that protects cells from damage, and most people don’t get enough of it from vegetables alone.
Purslane also contains a range of plant compounds with antioxidant and anti-inflammatory properties. These contribute to its traditional reputation as a healing plant, and they’re part of why researchers have taken a closer look at its effects on metabolic health.
Effects on Blood Sugar and Cholesterol
Several clinical trials have tested purslane’s effects on blood sugar and cholesterol, mostly using purslane seed powder or capsules rather than the fresh plant. In a randomized, double-blind trial involving people with type 2 diabetes, daily consumption of 10 grams of purslane seed powder significantly reduced fasting blood sugar, post-meal blood sugar, and insulin levels. A separate trial combining purslane with aerobic exercise in women with type 2 diabetes found meaningful drops in blood sugar and cholesterol, along with increases in HDL (the protective form of cholesterol).
Trials in other populations have shown similar patterns. Obese adolescents who took purslane seed capsules for one month had significant decreases in LDL cholesterol and triglycerides. Patients with non-alcoholic fatty liver disease who consumed purslane seeds alongside a low-calorie diet for eight weeks saw reductions in blood sugar and cholesterol compared to the control group. These results are promising, though the trials were relatively small and used concentrated seed preparations, not the amounts you’d typically eat in a salad.
How to Eat Purslane
The entire plant is edible: leaves, stems, and flower buds. Raw purslane has a mild tanginess and a crisp, juicy texture that works well in salads, where it pairs naturally with tomatoes, cucumbers, and feta cheese. In Mexican cuisine, it’s commonly sautéed with onions, garlic, and chili peppers as a taco filling. Mediterranean cooks add it to soups, stews, and yogurt-based dips. It can also be blended into smoothies, tossed into stir-fries, or used anywhere you’d use spinach or watercress.
Young leaves and tender stem tips have the best texture. Older stems can get a bit fibrous, though they soften with cooking. If you’re harvesting from your garden or yard, make sure the area hasn’t been treated with herbicides or pesticides.
Oxalate Content and Who Should Be Cautious
Purslane contains oxalates, compounds that can bind to calcium and contribute to kidney stone formation in susceptible people. The oxalate content varies depending on growing conditions and the part of the plant, but fresh leaves have been measured at roughly 113 to 255 mg of total oxalates per 100 grams, with some samples reaching much higher levels. Young leaves tend to contain less than mature ones.
For most people, eating purslane occasionally poses no issue. But if you have a history of calcium-oxalate kidney stones or are at elevated risk for them, it’s worth limiting your intake. Cooking purslane and pairing it with calcium-rich foods like yogurt can reduce the amount of oxalate your body absorbs. Some researchers have noted that while purslane’s nutritional benefits are underappreciated in Western diets, its relatively high oxalate content is a reason to treat it as a regular part of a varied diet rather than a daily staple eaten in large quantities.