Product Overview
Quercetin is a naturally occurring dietary flavonol found in various plants, fruits, and vegetables, with Sophora japonica (Japanese Pagoda tree flower buds) serving as one of the richest and most sustainable commercial sources. As a master bioflavonoid, Quercetin is celebrated across the nutraceutical industry for its exceptional biological activities, particularly its capacity to scavenge free radicals and support healthy immune and inflammatory responses.
Promaxbio offers pharmaceutical-grade Quercetin standardized to a minimum purity of 95% or 98% using High-Performance Liquid Chromatography (HPLC). Manufactured under stringent cGMP guidelines, our raw material provides B2B dietary supplement brands, functional beverage manufacturers, and longevity formulators with a reliable, high-purity ingredient tailored for immune health, cellular defense, and anti-aging formulations.
Product Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Product Name | Quercetin | Visual |
| Botanical Name | Sophora japonica L. | Taxonomic Identity |
| Assay (Purity) | Quercetin ≥ 95.0% or 98.0% | HPLC |
| Part Used | Flower Bud | Visual |
| Appearance | Yellow to greenish-yellow crystalline powder | Organoleptic |
| Odor & Taste | Characteristic, bland | Organoleptic |
| Particle Size | 100% pass 80 mesh | USP <786> |
| Loss on Drying | ≤ 5.0% | USP <731> |
| Heavy Metals (as Pb) | ≤ 10 ppm (Pb ≤ 2 ppm, As ≤ 2 ppm) | ICP-MS |
| Microbiological Profile | Total Plate Count < 1,000 CFU/g; Yeast & Mold < 100 CFU/g; E. coli / Salmonella Negative | USP <2021/2022> |
Functional Applications
- Immune System & Respiratory Support: Helps maintain healthy immune function, modulates histamine responses, and supports seasonal respiratory comfort.
- Powerful Antioxidant Defense: Neutralizes reactive oxygen species (ROS) and protects cellular lipids and DNA from oxidative stress.
- Cellular Longevity & Senescence Management: Frequently utilized in advanced anti-aging and longevity protocols for its supportive role in cellular health.
- Cardiovascular & Vascular Wellness: Promotes healthy blood vessel tone, normal circulation, and overall cardiovascular resilience.
Formulation Combinations
- Immune & Respiratory Stacks: Synergizes effectively with Vitamin C, Zinc, and Bromelain (which also enhances quercetin absorption) for comprehensive seasonal defense.
- Longevity & Cellular Stacks: Pairs seamlessly with NMN, Resveratrol, and Fisetin for advanced anti-aging matrices.
- Bioavailability Optimization: Can be combined with Black Pepper Extract (Piperine) to boost systemic absorption and plasma concentrations.
Market Opportunities
- Immune Health Core Staple: A perennial high-demand ingredient in global dietary supplement markets, particularly for year-round immune and respiratory wellness.
- Longevity & Biohacking Boom: Growing consumer preference for plant-derived bioflavonoids supporting healthy aging and cellular rejuvenation.
- Versatile Delivery Formats: Easily formulated into capsules, tablets, functional drink powders, and chewable formats.
Quality & Supply Assurance
Promaxbio guarantees strict cGMP-compliant manufacturing for every commercial batch of Quercetin. Our material undergoes rigorous HPLC assay testing, heavy metal screening via ICP-MS, and complete microbiological verification. Packaged in light-resistant, food-grade polyethylene bags inside secure fiber drums, our product is fully protected against moisture and degradation during storage and international transit.
Frequently Asked Questions (FAQ)
Q1: What is the difference between Quercetin 95% and 98%?
A: Both grades offer exceptionally high purity derived from Sophora japonica. The 98% grade undergoes an additional level of refinement, making it ideal for high-end pharmaceutical and precise capsule formulations.
Q2: How can the bioavailability of Quercetin be improved in a formulation?
A: Quercetin can be paired with absorption enhancers such as Bromelain, Vitamin C, or Piperine (Black Pepper Extract) to significantly improve its intestinal uptake and bioavailability.
References & Scientific Literature
- Li, Y., et al. (2016). Quercetin, inflammation and immunity. Nutrients, 8(3), 167. DOI: 10.3390/nu8030167
- Boots, A. W., Haenen, G. R., & Bast, A. (2008). Health effects of quercetin: from antioxidant to nutraceutical. European Journal of Pharmacology, 585(2-3), 325–337. DOI: 10.1016/j.ejphar.2008.03.008
