As people increasingly favor ingredients derived from natural plants for blood sugar management, mulberry leaf extract has become a popular choice in blood sugar formulations due to its unique bioactive components, especially 1-Deoxynojirimycin (DNJ).
We are seeing growing demand from dietary supplement brands, functional food manufacturers, and beverage innovators, all seeking natural blood sugar support solutions. This article will explain why mulberry leaf extract is becoming a premium ingredient in modern blood sugar formulations.
What Is Mulberry Leaf Extract?
Mulberry leaf extract is derived from the leaves of the Morus alba tree, traditionally used in Asian herbal medicine for metabolic and circulatory health. The extract is made by drying and processing mulberry leaves-typically using processes such as hot water extraction, concentration, filtration, and spray drying-to obtain a powder suitable for dietary supplements, functional foods, beverages, or teas.
Mulberry leaf extract is typically a brownish-yellow powder. It retains a variety of bioactive components, including flavonoids, alkaloids, polysaccharides, amino acids, and various vitamins and trace elements. 1-Deoxynojirimycin (DNJ) is a piperidine polyhydroxy alkaloid isolated from mulberry leaves. DNJ is unique to mulberry leaves in the plant.
Key Active Compounds: DNJ
DNJ is an iminosugar alkaloid uniquely abundant in mulberry leaves. Its primary mechanism of action is the inhibition of intestinal carbohydrate‑digesting enzymes - especially α‑glucosidase. By blocking this enzyme, DNJ reduces the breakdown of complex carbohydrates (like starches and sucrose) into simple sugars, thereby slowing the rate of glucose absorption into the bloodstream.
Standardizing mulberry leaf extract to a specified DNJ concentration helps ensure consistent physiological effects. For example, clinical studies have used extracts delivering as little as ~6–9 mg DNJ per serving to achieve measurable glycemic benefits.
DNJ specification typically range from:
0.5% DNJ (extract for general health)
1% DNJ (extract for blood sugar formulas)
3–5% DNJ (high-potency niche formulations)
Undersun specializes in producing 0.5%, 1%, 2%, 5%, and 10% DNJ through processes such as pure water extraction, membrane filtration, and decolorization. Our DNJ has no solvent residue, superior solubility, and contains no excipients. It is the ideal choice for brands seeking a clean label.
How Mulberry Leaf Extract Supports Blood Sugar Balance?
By inhibiting carbohydrate-digesting enzymes, mulberry leaf extract - via DNJ - dampens post-meal glucose spikes (postprandial glycemia). This makes it a valuable ingredient for blood sugar formulas designed to support glycemic balance, especially in products targeting individuals with impaired glucose tolerance or those seeking metabolic wellness. A randomized trial found that mulberry leaf extract reduced post-meal glucose by 24–29% in healthy adults consuming carbohydrate-rich meals.
Moreover, emerging preclinical evidence suggests mulberry leaf extract may improve insulin sensitivity through signaling pathways tied to glucose uptake. In animal models, mulberry leaf extract (and DNJ) has been shown to activate the IRS-1/PI3K/Akt pathway in skeletal muscle, enhancing translocation of glucose transporters (GLUT4) to the cell membrane and boosting glucose clearance from the blood.
Synergy With Other Blood Sugar Ingredients
In many blood sugar formulas, mulberry leaf extract is not used alone. Its mechanism - slowing carbohydrate absorption - can synergize with other glucose‑regulating ingredients to produce a more comprehensive metabolic support product. For example:
- With compounds that enhance insulin sensitivity (e.g., chromium, berberine, alpha-lipoic acid), mulberry leaf extract's absorption‑slowing effect can reduce glycemic load while the other ingredients improve peripheral glucose uptake.
- With fiber‑rich ingredients or soluble dietary fibers, mulberry leaf extract may help further moderate carbohydrate digestion and slow glucose release.
- With botanical antioxidants (e.g., flavonoids, polyphenols), the formulation may gain additional benefits - such as reduced oxidative stress, improved insulin signaling, and support for metabolic health beyond glucose control.
Because mulberry leaf extract is plant-based and relatively neutral in taste, it integrates well into multi-ingredient blends. This flexibility makes it ideal for diverse delivery forms - from capsules to functional foods and beverages.
Clinical Evidence Supporting Mulberry Leaf's Glucose Benefits
Here are two data‑driven examples:
1. In a randomized, double‑blind, placebo‑controlled study, participants who consumed mulberry leaf extract along with a sucrose challenge experienced significantly lower post‑meal blood glucose and insulin peaks compared with placebo. The study reported a more balanced glucose response, avoiding reactive hypoglycemia that appeared in the placebo group.
2. In another crossover trial involving subjects with impaired glucose metabolism, ingestion of mulberry leaf extract enriched in DNJ (3, 6, or 9 mg) led to attenuated acute glycemic response after a 200 g boiled white‑rice challenge; over a 12‑week supplementation period (6 mg DNJ, t.i.d.), participants showed improved postprandial glycemic control as indicated by higher 1,5-anhydroglucitol levels. Furthermore, a self-controlled crossover study demonstrated that consuming mulberry leaf extract alongside various carbohydrates (sucrose, maltose, maltodextrin) significantly reduced the glycemic index (GI) of these carbs - e.g., reducing the GI of sucrose by roughly 33.5% and maltose by ~53.1% relative to controls.
Uses in Beverages, Powders, and Gummies
As a powdered extract, mulberry leaf extract can be easily incorporated into many delivery formats.
- Functional Beverages & Teas: Mulberry leaf extract can be blended into ready-to-drink or powdered beverages.
- Powdered Supplements: For traditional supplement formats, mulberry leaf extract powder - standardized for DNJ - can easily be encapsulated or measured for inclusion in bulk supplement blends.
- Gummies & Chewables: Because mulberry leaf extract is plant-based and generally tolerable (without strong bitterness), it can be formulated into chewables. Combined with flavors and sweeteners, mulberry leaf extract-based gummies.
Current Legal Status in Different Countries
- United States: Mulberry leaf extract is allowed in dietary supplements under DSHEA 1994.
- European Union: Mulberry leaf extract is classified as a Novel Food unless proven to be used before 1997. Companies must seek pre-market approval. Health claims require EFSA substantiation.
- United Kingdom: Allowed in supplements and functional foods. Any blood sugar claim must be supported by scientific evidence and approved through UKNHCC.
- Japan (FOSHU & FFC): Japan has a structured system for metabolic health foods. Mulberry leaf extract is commonly used in FFC-labeled and FOSHU-approved products. Claims related to postprandial blood glucose require clinical data.
- Other Asian Markets: ASEAN and South Korea vary by country. Most allow mulberry leaf extract in supplements but restrict disease claims.
Choose a Reliable Mulberry Leaf Extract Manufacturer
Choosing a reliable mulberry leaf extract manufacturer is crucial to ensuring the stability and safety of your formulation and the impact of your brand. Undersun has ISO, HACCP, Kosher, and Halal certifications, ensuring strict quality control. Our company offers multiple DNJ specifications, customizable formulations, and complete documentation including COA, heavy-metal testing, and microbial reports. With its own factory, transparent sourcing, and strong R&D capability, Undersun provides dependable support for supplements, functional foods, and beverage brands. Contact us today!
FAQ
1. Can mulberry leaf extract be used in beverages?
Yes. Water-soluble grades are heat-stable and commonly used in RTD functional drinks.
2. Is mulberry leaf extract safe for long-term use?
Human studies indicate high safety with minimal gastrointestinal side effects.
4. What is the recommended daily dosage?
Typical dosage ranges from 500–1500 mg depending on DNJ concentration and formula type.
5. Can mulberry extract be combined with berberine or chromium?
Yes. These combinations are common and demonstrate strong synergy in metabolic support formulas.
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Reference
https://pubmed.ncbi.nlm.nih.gov/24843505/
https://link.springer.com/article/10.1186/s12986-021-00571-2
