Moringa

What it is

Moringa (Moringa oleifera) is a fast-growing tree eaten as a vegetable and used in traditional medicine across Africa and Asia. The leaves, seeds and pods are the main parts eaten or sold as food supplements, and the leaves are rich in polyphenols (plant compounds with antioxidant activity) [1]. On the shelf it comes as dried leaf powder, capsules, tea and extracts, and the amount of active compounds is not standardised between products [2].

How it might work

The leaves contain polyphenols, flavonoids and glucosinolates, which are thought to be behind the effects seen in lab work [2]. In a pooled analysis of 44 studies in diabetic rodents, moringa extracts lowered blood glucose, but animal results do not show that the same happens in people [3].

What the research says

Blood sugar. The best sign of a benefit comes from a 12-week placebo-controlled trial in 65 adults with prediabetes. Fasting blood glucose and HbA1c (a three-month average of blood sugar) fell in the moringa group and rose slightly in the placebo group [4]. A small crossover study of 17 people with diabetes found that adding 20 g of leaf powder to a meal gave a lower blood-sugar rise afterwards, with no difference in 10 healthy people [5]. A 2025 meta-analysis (a study that pools results from several trials) of nine trials, however, found no significant drop in fasting glucose across seven trials with 227 people (SMD −0.12, 95% CI −0.38 to 0.14), and no significant drop in HbA1c across three trials [6]. A 14-day trial in 40 people with type 2 diabetes also found no difference between groups after adjusting for starting values [7].

Breast milk. A Cochrane review of 41 trials of oral milk-boosting remedies (3,005 mothers) included moringa among the natural options. The trials were too different to pool, and the reviewers rated the evidence very low certainty, but moringa and a mixed herbal tea may increase infant weight [8]. A 2026 review of ten trials in mothers of premature babies found low-certainty evidence that moringa leaf capsules, among other herbal remedies, increase breast milk production [9]. In a pilot trial of 50 Kenyan mother-baby pairs, 20 g a day of moringa for three months did not change the vitamin A in breast milk, though it modestly raised alpha-carotene [10].

Immune support in HIV. In a double-blind trial of 200 adults on HIV treatment in Nigeria, moringa leaf powder for six months was linked to higher CD4 counts than placebo, while viral load and weight were unchanged [11].

Blood pressure. In the 2025 meta-analysis, systolic blood pressure did not change significantly (SMD −0.14, 95% CI −0.47 to 0.18, four trials). Diastolic pressure fell (SMD −0.41, 95% CI −0.75 to −0.07), but the result disappeared when any one of several trials was removed [6]. In a small trial of 41 healthy people, blood pressure was lower two hours after eating 120 g of cooked leaves [12].

Cholesterol and weight. The same meta-analysis found no significant change in LDL cholesterol (SMD −0.30, 95% CI −1.10 to 0.51), total cholesterol, HDL, triglycerides, body weight or BMI. Results varied widely between trials [6]. Subgroup analyses hinted at better results with doses under 10 g a day and trials of 12 weeks or more, but these were exploratory [6]. In the prediabetes trial, inflammation markers, blood lipids and blood pressure did not differ from placebo [13].

Doses used in studies

Trial doses ranged from 900 mg a day of an extract to 60 g a day of leaves, for 2 weeks to 6 months [6]. Examples: 2.4 g a day of dry leaf powder in capsules for 12 weeks in prediabetes [4]; 20 g of powder added to one meal [5]; 20, 40 or 60 g a day of leaves for 14 days in type 2 diabetes [7]; 20 g a day in porridge for three months in breastfeeding mothers [10]; and 1.85 g a day for 14 days in a drug-interaction study [14]. These are the amounts tested, not recommendations.

Safety and interactions

Side effects. A 2015 review found no adverse effects reported in human studies of moringa [2]. A narrative review of 12 studies in pregnant and breastfeeding women reported no contraindications [15]. Most trials were short and not designed to detect rare or long-term harms [6].

Upper limits. No safe upper intake has been set. Trials used up to 60 g of leaves a day for two weeks [6].

Medicines. In lab tests on human liver enzymes, a moringa extract only weakly inhibited the CYP1A2 enzyme, which processes some medicines [16]. In 11 people with HIV, 1.85 g a day of leaf powder for 14 days did not significantly change blood levels of the drug nevirapine (AUC ratio 1.07, 90% CI 1.00 to 1.14) [14]. We found no studies testing moringa alongside blood-sugar or blood-pressure medicines. Because some trials found lower blood sugar, people on such medicines may want to ask a doctor before using it.

Pregnancy and breastfeeding. A review of herbs to avoid in pregnancy lists Moringa oleifera, based mainly on animal and lab studies [17]. Human studies of supplementation in pregnancy reported no contraindications, but that review covered a small set of studies [15]. Moringa has been given to breastfeeding mothers at 20 g a day for three months in a small trial [10].

Kidney, liver and bleeding disorders. We found no human studies on moringa in people with kidney disease, liver disease or bleeding disorders.

Caveats and open questions

The 2025 meta-analysis rated the certainty of the evidence as very low for every outcome, because of bias, large differences between trials and indirectness [6]. Trials differed in what they tested (leaf powder, steamed leaves, extracts, herbal blends), the dose and the length [6]. The most encouraging blood-sugar results come from a single small trial that has not been replicated in a larger one [4]. Product strength is not standardised, so results from one product may not apply to another [2].