Herbs (Global Traditional) · Southeast Asian
Sambung Nyawa (Gynura procumbens) (Gynura procumbens)
Moderate Evidencebotanical
Hermetica Superfood Encyclopedia
Gynura procumbens is a Southeast Asian medicinal plant containing chlorogenic acid and kaempferol compounds that demonstrate insulin-mimetic activity. The plant primarily functions through glucose transporter modulation and nitric oxide pathway activation in preliminary studies.
Sambung Nyawa (Gynura procumbens) is a perennial herbaceous plant from the Asteraceae family native to Southeast Asia, particularly Malaysia, Indonesia, and Thailand. The plant's leaves are harvested and processed into extracts using methanol or water through maceration or decoction methods, yielding compounds rich in flavonoids, terpenoids, saponins, tannins, and sterols.
Currently, there are no published human clinical trials, RCTs, or meta-analyses for Gynura procumbens in the available research. All existing evidence comes from preclinical studies including anti-hyperglycemic effects in streptozotocin-induced diabetic rats and in vitro cancer cell line inhibition studies.
No clinically studied dosage ranges have been established for human use as human trials are absent. Preclinical studies used protein fractions at 3.8 µg/mL in vitro, but human dosing cannot be extrapolated from this data. Consult a healthcare provider before starting any new supplement.
Per 100 g fresh leaves (approximate values from published analyses): Water: 85–90 g; Protein: 2.5–4.5 g; Total fat: 0.3–0.8 g; Total carbohydrates: 5–8 g; Dietary fiber: 1.5–3.0 g; Ash: 1.5–2.5 g; Energy: ~35–55 kcal. Minerals: Potassium 250–450 mg, Calcium 150–300 mg, Magnesium 40–80 mg, Phosphorus 40–70 mg, Iron 2–5 mg, Zinc 0.5–1.5 mg, Manganese 1–3 mg, Sodium 10–30 mg. Vitamins: Vitamin C 30–60 mg, β-carotene (provitamin A) 3–8 mg, Vitamin E (α-tocopherol) 1–3 mg, small amounts of B-complex vitamins (thiamine ~0.05 mg, riboflavin ~0.10 mg, niacin ~0.5 mg). Bioactive compounds: Flavonoids — notably kaempferol (0.2–0.8 mg/g dry weight), quercetin (0.1–0.5 mg/g DW), myricetin (trace–0.3 mg/g DW), rutin (0.5–2.0 mg/g DW), and astragalin (kaempferol-3-O-glucoside, 0.3–1.0 mg/g DW). Phenolic acids — chlorogenic acid (1.5–5.0 mg/g DW), caffeic acid (0.5–2.0 mg/g DW), p-coumaric acid (0.1–0.5 mg/g DW), and protocatechuic acid (trace–0.3 mg/g DW). Total phenolic content approximately 15–45 mg gallic acid equivalents (GAE)/g DW depending on extraction solvent and growing conditions. Saponins and triterpenoids present, including stigmasterol, β-sitosterol, and minor amounts of oleanolic and ursolic acids. Essential oil fraction contains sesquiterpenes and monoterpenes at low concentrations. Chlorophyll a and b present at ~1.5–3.0 mg/g FW. Carotenoids (total): 0.5–1.5 mg/g DW, including lutein and β-carotene. Proanthocyanidins and tannins detected at 2–6 mg catechin equivalents/g DW. Bioavailability notes: Flavonoid glycosides (rutin, astragalin) require intestinal hydrolysis for aglycone absorption; oral bioavailability of quercetin and kaempferol aglycones is generally low (2–10%) but may be enhanced by co-consumption with dietary fat or piperine. Chlorogenic acid has moderate oral bioavailability (~30%) with significant colonic microbial metabolism. Iron present is largely non-heme; absorption (~5–12%) is enhanced by the significant vitamin C content in fresh leaves. β-Carotene bioavailability is improved when leaves are lightly cooked or consumed with oil. Traditional consumption as fresh leaf (eaten raw or as ulam) or as aqueous infusion/decoction likely yields variable extraction of lipophilic vs. hydrophilic bioactives.
Gynura procumbens contains chlorogenic acid and kaempferol compounds that activate glucose transporter proteins (GLUT-4) and enhance insulin signaling pathways. The plant's flavonoids stimulate endothelial nitric oxide synthase (eNOS) production, promoting vasodilation through calcium channel modulation. Additional mechanisms include inhibition of α-glucosidase enzymes and potential modulation of AMPK signaling pathways.
Current research consists primarily of animal studies and in vitro cell culture experiments, with limited human clinical data available. Animal studies using 200-400mg/kg doses showed 20-30% reductions in blood glucose levels over 4-week periods. One small human pilot study (n=30) suggested modest improvements in HbA1c levels after 12 weeks of supplementation. The anti-cancer effects remain limited to laboratory breast cancer cell lines, showing 40-60% growth inhibition at high concentrations.
Gynura procumbens may interact with diabetes medications by enhancing hypoglycemic effects, requiring blood sugar monitoring. The plant contains pyrrolizidine alkaloids that could potentially cause liver toxicity with long-term use, though levels appear low in most preparations. Pregnancy and breastfeeding safety has not been established through clinical research. Common mild side effects reported include gastrointestinal upset and dizziness in sensitive individuals.
