Description
The standardized extract of Guava leaves (Psidium guajava), containing polyphenols and flavonoids including quercetin as the principal markers. Used in blood-sugar support, oral-care, and traditional medicine applications.
Green-brown to brown free-flowing powder. Water-soluble.
We supply food-grade Guava Leaf Extract from manufacturers in China holding ISO, Halal, Kosher and other certifications relevant to the product and production.
Common market grades include 10:1 herb-to-extract ratio (the baseline), 10 percent Polyphenols (standard supplement grade), 20 percent Polyphenols (premium grade), and Quercetin 1 to 5 percent standardized grades.
Bulk and reduced-MOQ shipments. Batch-level COA covering total polyphenols (UV), quercetin content (HPLC), residual solvents, heavy metals, pesticides, and microbiology.
Introduction
Guava leaves have been used in traditional medicine across Latin American, Asian, and African cultures for digestive complaints, oral health, and diabetes management. The compound's blood-sugar positioning has been formalized in Japan, where Guava Leaf Tea is approved as a Food for Specified Health Uses (FOSHU) for blood-sugar management.
Industrial production proceeds by hot-water and ethanol extraction of dried Guava leaves, followed by purification and standardization to defined polyphenol or quercetin content.
Recognized as a permitted food ingredient by the U.S. FDA, the European Food Safety Authority, and equivalent regulators worldwide.
The polyphenols inhibit alpha-glucosidase and alpha-amylase enzymes, slowing carbohydrate digestion and reducing post-meal blood-glucose elevations. Clinical evidence supports modest effects on post-prandial glucose at appropriate doses.
Strategic positioning targets blood-sugar support supplements, oral-care formulations, and functional beverage applications.
Where it is used
- Blood-sugar support dietary supplements: glucose-management formulations (the dominant commercial application)
- Oral-care products: toothpaste, mouthwash, and gum-health formulations
- Traditional medicine product formulations across Latin American and Asian markets
- Functional beverages: wellness teas and metabolic-health drinks
- Weight-management supplements
- Cosmetic skincare: anti-aging and antimicrobial formulations
- Digestive-health and anti-diarrheal traditional applications
Technical data
| Item | Specification |
|---|---|
| Appearance | Green-brown to brown free-flowing powder |
| Total polyphenols (UV) | 10% / 20% (grade dependent) |
| Quercetin (HPLC) | 1% to 5% (standardized grades) |
| Loss on drying | ≤ 5.0% |
| Residue on ignition | ≤ 8.0% |
| Heavy metals (as Pb) | ≤ 2 mg/kg |
| Total plate count | ≤ 10000 cfu/g |
| Source | Psidium guajava dried leaves |
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