USDA Nutrient-Dense Foods · Vegetable
Sweet Potato Leaves (Ipomoea batatas) (Ipomoea batatas)
Preliminary EvidenceCompound
Hermetica Superfood Encyclopedia
Sweet potato leaves (Ipomoea batatas) are nutrient-dense dark leafy greens rich in anthocyanins and polyphenolic compounds that provide antioxidant activity. These bioactive compounds work by scavenging free radicals and reducing lipid peroxidation to support cellular protection.
Sweet potato leaves are the edible foliage of the Ipomoea batatas plant, a perennial vine native to Central and South America. Now cultivated globally in tropical regions, the leaves are harvested and consumed either cooked as a vegetable or processed into polyphenol-rich extracts for supplementation. They are classified as a nutrient-dense food rich in flavonoids and chlorogenic acid derivatives.
The clinical evidence for sweet potato leaves is limited, with no large-scale randomized controlled trials or meta-analyses available. Existing research consists of small intervention trials, one of which found that 200 g of cooked leaves per day improved immune markers and antioxidant capacity, while another trial (PMID: 18818160) linked the same daily amount to reduced lipid peroxidation.
Human clinical studies have used 200 grams of cooked sweet potato leaves daily for up to 7 days. One study specified this amount contained 902 mg of polyphenols. No standardized dosages for powdered or extract forms have been established in human trials. Consult a healthcare provider before starting any new supplement.
Sweet potato leaves (Ipomoea batatas) are nutrient-dense leafy greens with the following approximate composition per 100g fresh weight: Macronutrients: Protein 2.0–3.5g (notably higher than many leafy greens, containing essential amino acids including lysine); Total carbohydrates 8–10g; Dietary fiber 2.5–3.5g (mix of soluble and insoluble); Fat 0.2–0.5g; Water content ~85–88g; Energy approximately 40–50 kcal. Key Vitamins: Vitamin A (as beta-carotene) 4,000–8,000 IU (purple varieties tend lower in carotenoids vs. green varieties); Vitamin C 11–35mg (bioavailability moderate, partially reduced by cooking); Vitamin K1 approximately 50–108mcg (high, relevant for clotting and bone metabolism); Folate (B9) 30–60mcg DFE; Riboflavin (B2) 0.15–0.35mg; Thiamine (B1) 0.1–0.2mg; Vitamin E (alpha-tocopherol) 0.5–1.5mg. Key Minerals: Calcium 50–100mg (bioavailability reduced by moderate oxalate content ~200–400mg/100g); Iron 0.9–2.5mg (non-heme; absorption enhanced by co-consumed Vitamin C); Potassium 260–455mg; Magnesium 28–70mg; Zinc 0.3–0.6mg; Manganese 0.2–0.5mg; Phosphorus 50–80mg. Bioactive Compounds: Polyphenols total 150–500mg GAE/100g fresh weight, including chlorogenic acid, caffeic acid, and ferulic acid; Anthocyanins (predominantly in purple-leaf varieties): cyanidin-3-glucoside and peonidin-3-glucoside at 10–200mg/100g depending on cultivar — substantially higher in purple vs. green varieties; Carotenoids: beta-carotene 2–6mg/100g (green varieties higher), lutein and zeaxanthin present at 1–4mg/100g (relevant for ocular health); Quercetin and kaempferol glycosides detected at trace to modest levels (~5–20mg/100g). Bioavailability Notes: Fat-soluble compounds (beta-carotene, lutein, Vitamin E, Vitamin K) require co-consumption of dietary fat for optimal absorption; steaming or brief boiling (vs. raw) may improve protein digestibility but reduces Vitamin C by 20–40% and anthocyanins by up to 50%; oxalates moderately limit calcium and iron bioavailability and may be reduced by boiling and discarding water; overall polyphenol bioaccessibility is estimated at 20–40% depending on matrix and food processing method.
Sweet potato leaves contain anthocyanins and polyphenolic compounds that scavenge reactive oxygen species (ROS) and inhibit lipid peroxidation pathways. These compounds upregulate endogenous antioxidant enzymes like superoxide dismutase and catalase while modulating inflammatory cascades through NF-κB pathway inhibition.
Limited clinical evidence exists for sweet potato leaves as supplements. One small human trial demonstrated that 200g daily consumption of purple sweet potato leaves reduced lipid peroxidation markers, indicating decreased oxidative stress. A 7-day human intervention study examined immune function modulation, though specific outcomes were not detailed. Current evidence is preliminary and requires larger, controlled trials to establish therapeutic efficacy.
Sweet potato leaves are generally recognized as safe when consumed as food, with no significant adverse effects reported in clinical studies. No known drug interactions have been documented, though theoretical interactions may exist with anticoagulant medications due to vitamin K content. Safety during pregnancy and lactation has not been established through clinical trials. Individuals with kidney stones should exercise caution due to oxalate content in leafy greens.
