Supplement analysis backed by scientific evidence · PT

← All supplements
Moderate evidenceHeart & metabolic

Purslane

A leafy weed rich in alpha-linolenic acid, taken for blood sugar and cholesterol. Several meta-analyses of small trials show modest improvements, mostly in people who already have metabolic problems.

Evidence last reviewed: August 2026

View on iHerb Ships to 180+ countries · welcome discount for new customers

What the science says

  • Modest improvement in glycemic markers Moderate evidence

    A GRADE-assessed meta-analysis of randomised controlled trials found purslane lowered fasting glucose, insulin and HbA1c. The included trials were small and largely from one region.

  • Small reductions in blood lipids Moderate evidence

    A meta-analysis of randomised trials reported reductions in total and LDL cholesterol and triglycerides, with effects that were statistically significant but clinically small.

  • No effect on blood pressure or body weight Limited evidence

    A 2023 meta-analysis of randomised trials found no meaningful change in blood pressure, body weight, BMI or waist circumference.

Dosage & safety

Studied doseTrials used roughly 5–10 g/day of purslane seed powder, or 180–500 mg/day of extract, for 8–12 weeks.
SafetyWell tolerated as a food. High oxalate content is a concern for people prone to kidney stones, and it may add to glucose-lowering medication. Traditional use as a uterine stimulant means it is best avoided in pregnancy.

Scientific references

Where to buy

View on iHerb

Ships to 180+ countries · welcome discount for new customers

Referral link — this site may earn a commission on purchases.

Related in Heart & metabolic