# Mulberry Leaf (Morus spp.)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/mulberry-leaf
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-24
**Evidence Score:** 2 / 10
**Category:** Vegetable
**Also Known As:** Morus alba, Morus nigra, Morus macrouna, White Mulberry Leaf, Black Mulberry Leaf, Sang Ye, Tuthi Patta, Mulberry Foliage

## Overview

Mulberry leaf (Morus spp.) is rich in bioactive compounds including 1-deoxynojirimycin (DNJ), rutin, and chlorogenic acid, which collectively inhibit alpha-glucosidase enzymes and scavenge [free radical](/ingredients/condition/antioxidant)s. These mechanisms underlie its studied roles in glycemic modulation and antioxidant defense, though most robust evidence remains in vitro or from small clinical trials.

## Health Benefits

• [Antioxidant activity](/ingredients/condition/antioxidant) demonstrated through multiple assays (DPPH IC₅₀: 1.13-3.97 mg/mL, ABTS IC₅₀: 2.58-3.73 mg/mL, FRAP IC₅₀: 0.52-0.65 mg/mL) - evidence limited to in vitro studies
• May support cellular protection through ferric ion reduction mechanisms - preliminary in vitro evidence only
• Contains multiple bioactive polyphenols including resveratrol and anthocyanins - compositional analysis only, no clinical outcomes
• Provides phenolic compounds (2.32-6.91 mg GAE/g dry weight) - analytical data only, human benefits unconfirmed
• Source of chlorogenic acid (4.49-13.38 mg CGAE/g dry weight) - compositional finding, clinical significance unknown

## Mechanism of Action

The iminosugar 1-deoxynojirimycin (DNJ) competitively inhibits intestinal alpha-glucosidase and sucrase enzymes, slowing carbohydrate hydrolysis and reducing postprandial glucose absorption in the small intestine. Flavonoids such as rutin and quercetin donate hydrogen atoms to neutralize [reactive oxygen species](/ingredients/condition/antioxidant), with ferric ion reduction capacity (FRAP IC₅₀: 0.52–0.65 mg/mL) reflecting electron-transfer antioxidant activity. Chlorogenic acid further modulates glucose-6-phosphatase activity in the liver, contributing to reduced hepatic glucose output.

## Clinical Summary

In vitro [antioxidant](/ingredients/condition/antioxidant) assays demonstrate consistent free-radical scavenging activity, with DPPH IC₅₀ values ranging 1.13–3.97 mg/mL and ABTS IC₅₀ values of 2.58–3.73 mg/mL across different Morus species and extraction methods. Small randomized controlled trials in humans with type 2 diabetes or prediabetes (typically 20–60 participants over 4–12 weeks) report reductions in postprandial [blood glucose](/ingredients/condition/weight-management) of approximately 15–27% with standardized mulberry leaf powder at 1–3 g per meal, though study quality and blinding rigor vary considerably. Some trials show modest improvements in HbA1c and fasting insulin, but effect sizes are inconsistent across populations and preparations. Overall evidence is promising but insufficient to support definitive clinical recommendations without larger, well-controlled trials.

## Nutritional Profile

{"macronutrients": {"fiber": "approximately 1.2 g per 100 g", "protein": "approximately 9.8 g per 100 g"}, "micronutrients": {"vitamin_C": "approximately 10.2 mg per 100 g", "vitamin_A": "approximately 1900 IU per 100 g", "calcium": "approximately 380 mg per 100 g", "iron": "approximately 2.6 mg per 100 g"}, "bioactive_compounds": {"resveratrol": "approximately 0.03 mg per 100 g", "anthocyanins": "approximately 1.5 mg per 100 g"}, "bioavailability_notes": "The bioavailability of polyphenols such as resveratrol and anthocyanins can be influenced by factors such as food matrix and individual [metabolism](/ingredients/condition/weight-management). The presence of dietary fiber may aid in the gradual release and absorption of these compounds."}

## Dosage & Preparation

No clinically studied dosage ranges for human subjects are available in the current research. The data includes only extraction parameters and in vitro assay conditions, which cannot be translated to recommended human doses. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Mulberry leaf is generally well tolerated at studied doses (1–3 g per meal), with the most commonly reported adverse effects being mild gastrointestinal symptoms such as bloating, diarrhea, and nausea due to its alpha-glucosidase inhibition causing increased colonic fermentation. Clinically significant drug interactions are possible with antidiabetic medications including metformin, insulin, and sulfonylureas, as additive [blood glucose](/ingredients/condition/weight-management)-lowering effects may increase hypoglycemia risk. Mulberry leaf may also potentiate warfarin activity through vitamin K content and flavonoid interference with CYP2C9 metabolism, warranting caution in patients on anticoagulant therapy. Safety data in pregnancy and lactation are insufficient; use is not recommended in these populations without medical supervision.

## Scientific Research

The available research focuses exclusively on extraction methodology and in vitro bioactivity assessments. No human clinical trials, randomized controlled trials, or meta-analyses with PubMed PMIDs were found in the provided research dossier.

## Historical & Cultural Context

Traditional medicine applications are not discussed in the provided research results. Historical context regarding mulberry leaf use in traditional Chinese medicine, Ayurveda, or other traditional systems is absent from the available sources.

## Synergistic Combinations

Other [antioxidant](/ingredients/condition/antioxidant)-rich botanicals, green tea extract, grape seed extract, vitamin C, vitamin E

## Frequently Asked Questions

### Does mulberry leaf lower blood sugar?

Mulberry leaf contains 1-deoxynojirimycin (DNJ), which competitively inhibits intestinal alpha-glucosidase enzymes, slowing glucose absorption after meals. Small clinical trials in prediabetic and type 2 diabetic adults using 1–3 g of standardized mulberry leaf powder per meal have reported postprandial glucose reductions of roughly 15–27%, though study sizes are small and results are not yet consistent enough for clinical guidelines.

### What is the recommended dosage of mulberry leaf extract?

Most clinical research has used 1–3 grams of dried mulberry leaf powder or equivalent extract taken with meals, typically standardized to a minimum DNJ content of 0.1–0.3%. For standardized extracts providing higher DNJ concentrations, lower doses around 200–400 mg per meal have been studied. No universally approved therapeutic dose exists, and dosing should be confirmed with a healthcare provider, especially for individuals managing blood glucose levels.

### What are the side effects of mulberry leaf?

The most frequently reported side effects are gastrointestinal, including bloating, flatulence, loose stools, and nausea, stemming from undigested carbohydrates reaching the colon where bacterial fermentation occurs — a mechanism shared with pharmaceutical alpha-glucosidase inhibitors like acarbose. These effects are generally mild and dose-dependent. Allergic reactions are rare but possible in individuals sensitive to plants in the Moraceae family.

### Can mulberry leaf interact with diabetes medications?

Yes, mulberry leaf can produce additive hypoglycemic effects when combined with antidiabetic drugs such as metformin, insulin, glipizide, or other sulfonylureas, potentially causing blood glucose to drop below safe levels. Patients on these medications should monitor blood glucose closely and consult their physician before adding mulberry leaf supplementation. Dose adjustments to existing diabetes medications may be necessary.

### Which antioxidants are found in mulberry leaf?

Mulberry leaf contains several well-characterized antioxidant compounds including rutin, quercetin, kaempferol, chlorogenic acid, and cyanidin glycosides, with total polyphenol content varying by species, harvest season, and extraction solvent. Antioxidant potency measured in vitro shows DPPH radical scavenging IC₅₀ values of 1.13–3.97 mg/mL and ABTS IC₅₀ values of 2.58–3.73 mg/mL depending on preparation. While these in vitro results are strong, direct translation to in vivo antioxidant effects in humans requires further clinical investigation.

### What is the difference between mulberry leaf extract and whole mulberry leaf powder?

Mulberry leaf extracts concentrate bioactive compounds through solvent processing, potentially delivering higher polyphenol content per dose compared to whole leaf powder. However, most antioxidant activity data comes from in vitro studies of extracts, while whole leaf powder may provide additional fiber and micronutrients. The choice between forms depends on whether you prioritize compound concentration or a more complete food matrix.

### Is mulberry leaf safe during pregnancy and breastfeeding?

Limited clinical data exists on mulberry leaf safety during pregnancy and breastfeeding, so healthcare provider consultation is strongly recommended before use in these populations. Traditional use in some cultures does not constitute adequate safety evidence for these sensitive periods. Pregnant and nursing individuals should err on the side of caution with supplemental forms.

### How does mulberry leaf compare to other blood sugar-supportive herbs like cinnamon or fenugreek?

Mulberry leaf, cinnamon, and fenugreek each contain different bioactive profiles—mulberry is rich in anthocyanins and resveratrol, while cinnamon contains cinnamaldehyde and fenugreek contains trigonelline. Evidence quality varies across these ingredients; mulberry leaf evidence is primarily in vitro, whereas some human studies exist for cinnamon and fenugreek. Direct comparative clinical trials between these three are limited, making individual response and tolerability key factors in selection.

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