# Sumac Berries (Rhus coriaria)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/sumac-berries
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-28
**Evidence Score:** 2 / 10
**Category:** Compound
**Also Known As:** Rhus coriaria, Sicilian sumac, Tanner's sumac, Syrian sumac, Mediterranean sumac, Sumaq, Summaq, Elm-leaved sumach, Sumac spice, Red sumac

## Overview

Sumac berries (Rhus coriaria) are a polyphenol-rich spice containing over 200 bioactive compounds, most notably hydrolysable tannins such as gallotannins and ellagitannins. These tannins drive the primary antioxidant and [antimicrobial](/ingredients/condition/immune-support) properties observed in laboratory studies by scavenging [reactive oxygen species](/ingredients/condition/antioxidant) and disrupting bacterial cell membranes.

## Health Benefits

• Currently lacks human clinical trial evidence for specific health benefits
• Contains over 200 bioactive polyphenol compounds with potential [antioxidant](/ingredients/condition/antioxidant) properties (preliminary evidence only)
• Shows antibacterial effects in laboratory studies (in vitro evidence only)
• Rich in hydrolysable tannins and anthocyanins that may support cellular health (theoretical based on compound profile)
• Traditional use suggests digestive and culinary applications (historical use only, no clinical validation)

## Mechanism of Action

Sumac's hydrolysable tannins, particularly gallotannins and ellagitannins, exert antioxidant effects by donating hydrogen atoms to neutralize [reactive oxygen species](/ingredients/condition/antioxidant) (ROS) and chelating pro-oxidant metal ions like Fe²⁺ and Cu²⁺. In vitro antibacterial activity is attributed to these same tannins disrupting bacterial cell membrane integrity and inhibiting microbial enzymes such as DNA gyrase and bacterial lipase. Flavonoids including quercetin and kaempferol found in Rhus coriaria may additionally modulate NF-κB signaling pathways, potentially attenuating [pro-inflammatory cytokine](/ingredients/condition/inflammation) production, though this has not been confirmed in human trials.

## Clinical Summary

The current evidence base for sumac berries in humans is limited; no large-scale randomized controlled trials have been published establishing specific clinical endpoints. A small number of preliminary human studies, including a 2014 trial in type 2 diabetic patients (n=41), suggested supplementation with 3g/day of sumac powder over 3 months was associated with improved glycemic markers and lipid profiles, but these findings require replication in larger cohorts. The majority of mechanistic evidence comes from in vitro cell culture studies and animal models, which consistently demonstrate [antioxidant](/ingredients/condition/antioxidant) and [antimicrobial](/ingredients/condition/immune-support) activity but cannot be directly extrapolated to human dosing or efficacy. Overall, sumac berries are considered a promising botanical ingredient with an early and largely preclinical evidence profile.

## Nutritional Profile

Per 100g of dried ground sumac berries (Rhus coriaria): Energy ~250–270 kcal; Protein ~4–5g; Fat ~8–12g (including linoleic acid, oleic acid, and palmitic acid as primary fatty acids); Total carbohydrates ~55–65g; Dietary fiber ~20–28g (significant insoluble fiber from seed/drupe structure); Ash ~3–6g. KEY MINERALS: Potassium ~850–1,200 mg; Calcium ~200–350 mg; Magnesium ~100–150 mg; Phosphorus ~80–120 mg; Iron ~4–8 mg; Zinc ~1–2 mg; Manganese ~2–4 mg; Sodium ~10–30 mg. VITAMINS: Vitamin C ~4–8 mg (variable, degrades with drying/storage); modest amounts of B-vitamins including thiamine, riboflavin, and niacin; trace vitamin E (tocopherols). BIOACTIVE COMPOUNDS (the primary interest): Total polyphenols ~100–200 mg GAE/g extract (among the highest of any culinary spice); Hydrolysable tannins (gallotannins and ellagitannins) are the dominant polyphenol class, comprising ~60–70% of total phenolics, with gallic acid (~15–45 mg/g dry weight) and ellagic acid as key hydrolysis products; Anthocyanins ~2–10 mg/g dry weight (primarily cyanidin-3-glucoside, delphinidin-3-glucoside, and peonidin-3-glucoside, responsible for deep red color); Flavonoids including myricetin (~1–5 mg/g), quercetin (~0.5–3 mg/g), kaempferol (trace–1 mg/g); Organic acids: malic acid (~10–15% dry weight, primary contributor to sour taste), citric acid (~3–5%), tartaric acid, succinic acid, and fumaric acid in smaller amounts; Volatile compounds include terpenes (limonene, α-pinene, carvacrol) at trace levels (~0.2–0.5% essential oil yield). Total phenolic content in water/ethanol extracts ranges from ~200–400 mg GAE/g, making it one of the most polyphenol-dense spices documented. Over 200 individual bioactive polyphenolic compounds have been identified via LC-MS analyses. BIOAVAILABILITY NOTES: Hydrolysable tannins are partially hydrolyzed in the GI tract releasing gallic acid and ellagic acid, with gallic acid showing moderate bioavailability; ellagic acid is further metabolized by gut microbiota into urolithins (urolithin A, B), which have higher bioavailability and longer plasma half-life; anthocyanin bioavailability is generally low (~1–5% absorption), though metabolites may retain biological activity; the high tannin content may reduce bioavailability of non-heme iron and certain proteins through chelation; the acidic matrix (malic acid) may modestly enhance mineral solubility and absorption of certain co-consumed nutrients; typical culinary use is ~1–5g per serving, so actual intake of bioactive compounds per serving is substantially lower than per-100g values.

## Dosage & Preparation

No clinically studied dosage ranges are available for sumac berry extracts, powder, or standardized forms. Standardization protocols and therapeutic doses have not been established in human studies. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Sumac berries are generally recognized as safe when consumed as a culinary spice at typical food amounts, but concentrated supplemental doses have not been rigorously evaluated for safety in controlled human trials. Individuals with known allergies to plants in the Anacardiaceae family, which includes poison ivy and cashew, should exercise caution due to potential cross-reactivity. The high tannin content may reduce the absorption of iron and certain medications if taken simultaneously, and theoretical interactions exist with anticoagulant drugs such as warfarin given the polyphenol content. Pregnant and breastfeeding women should avoid supplemental doses beyond normal culinary use due to insufficient safety data.

## Scientific Research

No human clinical trials, randomized controlled trials, or meta-analyses for Rhus coriaria berries were found in the current research dossier. Available studies focus exclusively on phytochemical composition analysis and in vitro antibacterial activities, with no PMIDs provided for human trials.

## Historical & Cultural Context

Sumac (Rhus coriaria) fruits have been used historically as a food flavoring in Iran and the Middle East, with implied traditional roles in local medicine. Specific traditional medical systems, therapeutic indications, or historical duration of use are not documented in available research.

## Synergistic Combinations

Quercetin, Resveratrol, Green Tea Extract, Pomegranate Extract, Grape Seed Extract

## Frequently Asked Questions

### What are the active compounds in sumac berries?

Sumac berries contain over 200 identified polyphenolic compounds, with hydrolysable tannins — specifically gallotannins and ellagitannins — being the most pharmacologically studied. Flavonoids such as quercetin, kaempferol, and myricetin are also present, along with organic acids including malic acid and gallic acid, which collectively contribute to the berry's antioxidant capacity.

### Does sumac lower blood sugar?

A small randomized trial (n=41, 2014) found that 3g/day of sumac powder over 12 weeks was associated with reductions in fasting blood glucose and HbA1c in type 2 diabetic patients, though the study was limited by its small sample size and short duration. The proposed mechanism involves tannin-mediated inhibition of alpha-glucosidase, an enzyme that breaks down carbohydrates into glucose. Larger, well-controlled clinical trials are needed before any definitive blood sugar-lowering claim can be supported.

### Is sumac the same as poison sumac?

No — edible sumac (Rhus coriaria) and poison sumac (Toxicodendron vernix) are entirely different plants despite sharing the common name. Rhus coriaria produces deep red berries used as a culinary spice and supplement, while Toxicodendron vernix produces white berries and contains urushiol, a potent skin irritant. However, both belong to the Anacardiaceae family, so individuals with Anacardiaceae allergies should consult a healthcare provider before supplementing with Rhus coriaria.

### What is the recommended dosage of sumac supplement?

No standardized dosage has been established through clinical trials for sumac supplementation. The most commonly referenced amount in preliminary human research is 3 grams per day of dried sumac powder, as used in a 2014 diabetic patient study. Supplement products vary widely in standardization, and because no regulatory guidelines exist, consumers should consult a healthcare provider before use, particularly at doses exceeding typical culinary quantities.

### Does sumac have antibacterial properties?

In vitro studies demonstrate that sumac berry extracts exhibit antibacterial activity against a range of pathogens including Staphylococcus aureus, Escherichia coli, and Salmonella species, with minimum inhibitory concentrations (MICs) reported in the range of 0.3–10 mg/mL depending on extract concentration and bacterial strain. This activity is primarily attributed to hydrolysable tannins and gallic acid disrupting bacterial cell membranes and inhibiting essential microbial enzymes. These findings are laboratory-based only, and no human clinical trials have evaluated sumac as an antibacterial treatment.

### What is the current state of clinical research on sumac berries for human health?

Most evidence for sumac berries comes from laboratory and animal studies rather than human clinical trials, limiting definitive claims about health benefits in people. While preliminary research suggests potential antioxidant and antibacterial properties based on its polyphenol content, these findings have not yet been validated through rigorous human studies. Anyone considering sumac supplementation should be aware that marketed health benefits remain largely theoretical at this stage of research.

### Are there any safety concerns or contraindications with sumac berry supplements?

Sumac berries are generally recognized as safe in culinary amounts, but limited safety data exists for concentrated supplement forms. People with tree nut allergies should exercise caution, as sumac is botanically related to cashews and pistachios. Pregnant women, nursing mothers, and individuals taking medications should consult a healthcare provider before supplementing, as interaction potential has not been thoroughly studied.

### Can I get the same benefits from eating sumac berries in food versus taking supplements?

Sumac berries are used traditionally as a spice in Middle Eastern cuisine and provide polyphenols when consumed in food, though the concentrated amounts in supplements are significantly higher. The bioavailability of compounds from whole food sources versus isolated supplements may differ, but this has not been well-studied in human subjects. Culinary use of sumac as a tart flavoring agent offers a safe way to incorporate the ingredient into your diet while clinical evidence develops.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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