Product Description
Traditional Tropical Ingredients for Blood Sugar Reduction and Antibacterial Effects – Standardized Guava Extract with Quercetin/Polyphenols
Product Description
Guava Extract features quercetin and polyphenol components as active ingredients. It is derived from the leaves (also includes fruit sources) of the Myrtaceae guava (Psidium guajava), refined into a standardized concentrated powder through water-alcohol extraction and precipitation processes, with a polyphenol content of 5%–10%. Its flavonoid and tannin components have traditional applications and research basis in blood sugar health and antibacterial purposes, making it suitable for formulas related to blood sugar management, antibacterial, and antioxidant functions.
Guava leaves are commonly used as a blood sugar-lowering herb in tropical regions. Southeast Asia and South America have large markets, and in recent years, large-scale cultivation has begun in southern China.
Why Choose Nutralighting
- Our Guava Extract is formulated to meet the demands of B2B clients across multiple sectors
- Nutralighting ensures every batch meets rigorous quality standards. Our Guava Extract is tested for purity, potency, heavy metals, pesticide residues, and microbial contamination.
Basic Information
| Item | Content |
| Chinese Name | Guava Extract |
| Alias | Bālā (Fujian, China) |
| English Common Name | Guava Extract |
| Recommended Promoted English Name | Guava Extract (Standardized Natural Extract) |
| Main Ingredients | Quercetin, Polyphenols |
| Main Specifications | Polyphenols 5%-10% |
| Target Market | Southeast Asia, China, South America |
| Core Application Areas | Blood Sugar Health; Antibacterial; Antioxidant |
Standard Specifications (COA)
The following specifications are general reference values; specific values are based on the COA report of each batch.
| Test Items | Standard |
| Polyphenols | 5%-10% |
| Loss on Drying | ≤5.0% |
| Total Ash | ≤6.0% |
| Lead (Pb) | ≤1.0 mg/kg |
| Arsenic (As) | ≤2.0 mg/kg |
| Cadmium (Cd) | ≤0.5 mg/kg |
| Mercury (Hg) | ≤0.1 mg/kg |
| Pesticide residues (organochlorine/organophosphorus) | Complies with USP <561> |
| Aflatoxin B1 | ≤5.0 μg/kg |
| Total aflatoxins | ≤10.0 μg/kg |
| Total microbial count (TAMC) | ≤1×10⁴ CFU/g |
| Yeasts and molds (TYMC) | ≤1×10² CFU/g |
| Escherichia coli | Not detected (1g) |
| Salmonella | Not detected (1g) |
Introduction of Plant Material
The raw material of this product is dried leaves or fruits of Psidium guajava L. from the Myrtaceae family. Mainly produced in Guangdong, Guangxi, Fujian, Hainan, and Taiwan. Guava leaves are traditional Southeast Asian herbal medicine, with blood sugar-lowering and antibacterial effects. Recorded in the 2020 edition of the Pharmacopoeia of China (Guava Leaf).
Core Functions
Guava (Psidium guajava) extract has a substantial research basis in blood sugar health and antibacterial effects. Its components such as guavinoside and gallic acid can inhibit α-glucosidase and delay carbohydrate absorption, supporting postprandial blood sugar levels; in vitro studies show inhibitory activity against Staphylococcus aureus and Escherichia coli. Guava fruits are rich in vitamin C and have antioxidant properties.
The above results are mainly based on in vitro and clinical literature, and practical applications require comprehensive evaluation considering dosage forms and dosages.
Regulatory and Regional Access Status
The following information is compiled based on publicly available regulatory data. Actual market access should refer to the latest regulations of the target country.
| Region/Country | Regulatory Status | Key Notes |
| USA (FDA) | Dietary Supplements / GRAS | Plant extracts are generally regulated as dietary supplements; some ingredients have been recognized as GRAS (specific confirmation needed case by case). USP has monographs for many extracts. |
| China (NHC/NMPA) | Health Food Ingredients / Novel Foods | According to the 2020 edition of the Chinese Pharmacopoeia and standards such as GB 16740; some varieties are included in the health food ingredient catalog or can be used in general food catalogs, and the latest regulatory status of each variety needs to be specifically verified. |
Application Directions and Recommended Dosage
| Application Directions | Recommended Addition Amount | Applicable Dosage Form | Remarks |
| Oral Solid Beverage / Powder Drink | Determined According to Specification | Strip Pack, Bag, Can | Can be mixed with other functional ingredients, recommended to control amount using standardized extracts |
| Compressed Candy / Capsule | Determined According to Specification | Tablet, Hard Capsule | Each capsule is recommended to contain 250~500 mg of extract, taken 2~3 times daily |
| Oral liquid / functional beverage | According to specifications | Glass bottle, PET bottle | It is recommended to disperse in warm water first before adding to the system, pay attention to pH stability |
| Personal care and skincare products | 0.1~2.0%(w/w) | Lotion, serum, mask | Solubility and stability need to be evaluated according to the formulation system |
Recommended Daily Dosage Reference
- General Health Use: Use according to product specifications and formulation recommendations.
- Personal Care/Skincare: The amount added to formulations depends on the specific product, recommended 0.1~2.0%.
Appendix: References
(The following references are for technical reference; some are open access and can be viewed via PubMed/PMC or the journal’s official website)
[1] Chinese Pharmacopoeia 2020 Edition Part I (Guava Leaf Standard)
[2] Journal of Ethnopharmacology, 2020: Psidium guajava antidiabetic effects
[3] Phytotherapy Research, 2019: Guavusin and glucose metabolism
[4] Journal of Functional Foods, 2021: Guava leaf antimicrobial activity
Frequently Asked Questions
Our standard MOQ is 1 kg for sample orders and 25 kg for bulk commercial orders. Custom MOQ arrangements are available for long-term partners.
Yes. A full MSDS and Certificate of Analysis (COA) is provided with every shipment.
We use a proprietary water-based and food-grade ethanol extraction process followed by spray drying, ensuring a clean-label result without residual organic solvents.
Yes. Nutralighting supports OEM/ODM services including custom particle size, active standardization, and private labeling for B2B clients.
The shelf life is 24 months when stored properly in a cool, dry place away from direct sunlight and moisture.
We export globally, with main markets including North America, Europe, Southeast Asia, and Oceania. All shipments comply with local import regulations.
Packaging & Shipping
Standard Packaging
- Standard packaging: 25 kg/drums with dual inner plastic bags.
- Custom packaging available: 1 kg/aluminum foil bags, 5 kg/cartons, or as specified by the buyer.
- All packaging is food-grade and moisture-proof.
Shipping Terms
- Shipping methods: Express (DHL, FedEx, UPS), air freight, and sea freight.
- Sample orders (≤5 kg) can be shipped via express within 3–7 business days.
- Bulk orders are shipped by air or sea depending on quantity and destination.
- Documents provided: Commercial Invoice, Packing List, Bill of Lading, and Certificate of Origin.
Shelf Life & Storage
- Store in a cool, dry place below 25°C.
- Keep away from direct sunlight, heat, and moisture.
- Seal tightly after each use to maintain potency and freshness.
- Shelf life: 24 months under proper storage conditions.
