Purslane is one of the most nutrient-dense greens you can eat. Often dismissed as a garden weed, it contains more omega-3 fatty acids than any other leafy vegetable, along with unusually high levels of vitamin A, antioxidants, and a hormone called melatonin that’s rare in the plant world. It also comes with one notable downside: high oxalate content, which matters if you’re prone to kidney stones.
Omega-3s Rivaling Some Fish
Purslane’s standout feature is its omega-3 content. Fresh purslane leaves contain about 4 milligrams of alpha-linolenic acid (ALA) per gram of wet weight. That’s roughly four times more than spinach, eight times more than red leaf lettuce, and over fifteen times more than buttercrunch lettuce. ALA is the plant form of omega-3, and while your body converts only a small percentage into the more potent forms found in fish oil, purslane still offers a meaningful boost, especially if you don’t eat seafood regularly.
A single serving of purslane leaves won’t replace a salmon fillet, but as a regular addition to salads, sandwiches, or stir-fries, it contributes omega-3s in a way no other salad green can match.
Vitamins, Minerals, and Rare Antioxidants
A 100-gram serving of raw purslane (about 3.5 ounces) provides roughly 1,320 IU of vitamin A, which supports eye health, immune function, and skin repair. Purslane has been called the reigning champion of vitamins A and E among vegetables by researchers at the University of Florida’s agricultural extension program. It also contains more vitamin C and glutathione (a powerful antioxidant your body uses to protect cells from damage) than spinach does.
What truly sets purslane apart from other greens is its melatonin content. Fresh purslane leaves contain about 19,000 picograms per gram, a remarkably high concentration compared to most fruits and vegetables. Melatonin is best known for regulating sleep, but it also functions as an antioxidant that helps neutralize free radicals. One serving of fresh purslane also delivers about 14.8 milligrams of glutathione, another antioxidant that plays a central role in detoxification and immune defense.
Blood Pressure and Heart Health
A pooled analysis of five randomized controlled trials, published in the Journal of Research in Medical Sciences in 2025, found that purslane supplementation lowered systolic blood pressure (the top number) by about 3 mmHg on average. That’s a modest but clinically meaningful reduction, roughly comparable to what you’d expect from cutting sodium intake or adding regular walking. The effect on diastolic blood pressure (the bottom number) was less consistent overall, though participants over 40 with diabetes who consumed purslane for 12 weeks did see significant diastolic improvements.
The same body of research found that eating about three grams of purslane leaves daily with dinner improved lipid metabolism and reduced high cholesterol markers. Combined with its omega-3 content, these findings suggest purslane offers real cardiovascular benefits when eaten consistently over weeks or months.
Blood Sugar and Diabetes
Purslane has shown promise for blood sugar management, though the evidence is still mixed. One clinical trial gave people with type 2 diabetes 10 grams of purslane seeds daily (mixed into low-fat yogurt) for five weeks. Fasting blood sugar dropped slightly, but the change wasn’t statistically significant. However, an earlier trial using the same dose for eight weeks found results comparable to metformin, one of the most widely prescribed diabetes medications, in influencing fasting blood sugar and insulin levels.
The difference likely comes down to duration. Five weeks may not be enough time to see meaningful changes, while eight to twelve weeks of regular consumption appears more effective. Clinical evidence broadly supports purslane as beneficial for glycemic control in people with type 2 diabetes, but it works as a dietary addition, not a replacement for prescribed treatment.
The Oxalate Problem
Purslane’s biggest nutritional drawback is its oxalate content. Oxalates are naturally occurring compounds that bind to calcium in the body and can contribute to kidney stone formation. Purslane contains about 6,758 milligrams of oxalates per 100 grams on a dry weight basis. That’s lower than spinach (about 8,387 mg per 100 g dry weight) but still high enough to warrant caution.
If you have a history of calcium oxalate kidney stones, raw purslane is generally not recommended as a regular part of your diet. Cooking helps considerably. Boiling or blanching purslane reduces its soluble oxalate concentration, which is the form most likely to increase oxalate levels in your urine and promote stone formation. If you enjoy purslane but worry about oxalates, lightly cooking it and discarding the water is a practical compromise. For people without kidney stone risk, the oxalate content is unlikely to cause problems at normal dietary amounts.
How to Eat It
Purslane has a slightly tangy, lemony flavor with a succulent crunch, similar to watercress but juicier. The leaves, stems, and buds are all edible. You can toss raw leaves into salads, blend them into smoothies, or add them to sandwiches for a peppery bite. In Mediterranean and Middle Eastern cuisines, purslane is sautéed with olive oil and garlic or mixed into yogurt-based dips. It also holds up well in soups and stews.
If you’re foraging purslane from your yard, make sure you’re picking the right plant. Spotted spurge, a common lookalike, produces a milky sap when you break the stem. Purslane does not. Also avoid purslane growing near roads or in areas treated with pesticides or herbicides. Many farmers’ markets and specialty grocery stores carry cultivated purslane, which takes the guesswork out of identification.