What Specifications Should B2B Buyers Check When Purchasing Shilajit Extract?

Shilajit extract, considered a "panacea" in Ayurvedic medicine, is increasingly becoming a raw material for dietary supplements and functional foods. For B2B buyers making bulk purchases, selecting high-quality Shilajit extracts that meet international standards from numerous suppliers is crucial to ensuring the quality and compliance of the final product. This article systematically explains the core specifications that B2B buyers must verify when purchasing Shilajit extract, and focuses on how Xi'an SOST Biotech Co., Ltd. meets the bulk purchasing needs of global buyers through its rigorous quality control system.

I. What are the key active ingredient standards for Shilajit extract?

The core value of Shilajit extract lies in its complex matrix of bioactive components, among which fulvic acid content is the most critical quality indicator. Fulvic acid is a low molecular weight (typically <2000 Da) humic component with strong chelating ability and cellular nutrient transport function, which can increase mineral bioavailability by 40-60%.

1.1 Industry Standards for Fulvic Acid Content

According to mainstream international market standards, the fulvic acid content of high-quality Shilajit extract should meet the following grading:

Top-tier standard: Fulvic acid content ≥ 60% (HPLC detection method), suitable for high-end dietary supplements and functional foods.

Premium standard: Shilajit extract fulvic acid content 40-50%, meeting the production needs of general health products.

Basic standard: Fulvic acid content 20%-40%, suitable for ordinary nutritional supplements.

It is worth noting that higher fulvic acid content is not necessarily better. Studies have shown that a fulvic acid content of 15-40% in its natural resin form better preserves the synergistic mineral balance, while over-extraction (70-90%) may lead to nutritional imbalance and increase the risk of solvent residue. Therefore, B2B buyers should request suppliers to provide HPLC (High Performance Liquid Chromatography) or UV-Vis spectrophotometric test reports, rather than simple titration results, to ensure data accuracy and repeatability.

1.2 Other Key Active Ingredients

Besides fulvic acid, professional buyers should also pay attention to:
* Humic Acid Content: Generally, it should be in the range of 5%-15%, forming a synergistic effect with fulvic acid.
* Dibenzo-α-pyrones: A unique bioactive marker of Shilajit, standardized testing should be performed.
* Mineral Spectroscopy: Including quantitative analysis of trace elements such as iron, zinc, magnesium, and calcium.

Xi'an Sost Biotech Co., Ltd. provides Shilajit extracts with different fulvic acid contents ranging from 5% to 60%, using precise HPLC detection to ensure that the active ingredient content of each batch meets the customized needs of customers. The company has a complete standardized process and can adjust product specifications according to the regulatory requirements of the target market to meet diverse application scenarios from basic nutritional supplements to high-end functional foods.

II. What Heavy Metal and Microbial Tests are Required?

As a natural mineral-plant complex, Shilajit's raw materials may carry heavy metal contaminants from the geological environment. Therefore, third-party heavy metal testing is an uncompromising quality control link in B2B procurement.

2.1 Mandatory Standards for Heavy Metal Detection

According to the requirements of USP (United States Pharmacopeia), EP (European Pharmacopoeia), and Chinese Pharmacopoeia, the heavy metal limits for Shilajit extract should meet the following requirements:

Tests show that while the heavy metal contamination problem in commercially available Shilajit supplements is not as serious as previously thought, caution is still warranted. B2B buyers must require suppliers to provide an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) test report issued by an ISO 17025 certified laboratory. This method has a detection limit down to the ppb level (parts per billion), far superior to traditional atomic absorption spectrometry.

2.2 Pesticide Residues and Solvent Residues

For plant extracts, pesticide residues and extraction solvent residues are equally critical:
* Pesticide Residues: Must comply with USP<561> or EP 2.8.13 standards, and must not contain prohibited pesticides such as organochlorines and organophosphorus compounds.
* Solvent Residues: If ethanol or water extraction processes are used, must comply with ICH Q3C guidelines; the residual levels of solvents such as methanol, ethanol, and acetone should be below the safety threshold.

Xi'an Sost Biotech Co., Ltd. strictly implements the ISO 22000 and HACCP quality management systems. All batches of Shilajit extract have passed heavy metal and pesticide residue testing by authoritative third-party laboratories, ensuring lead content <1ppm, arsenic <0.5ppm, and mercury <0.1ppm, meeting the most stringent international standards. The company uses a purified water low-temperature extraction process to minimize the use of chemical solvents, controlling residue risks from the source.

III. What microbiological indicators must be tested for Shilajit extract?

Microbial contamination control is the core of dietary supplement raw material safety. Microbiological testing of Shilajit extract must comply with USP<2021> Microbial Limits for Dietary Supplements or EP 2.6.12/2.6.13 European Pharmacopoeia standards.

3.1 Key Indicators for Microbial Limits

3.2 Special Microbiological Control Requirements

For Shilajit resin extract exported to the EU market, it must also comply with EU 2073/2005 food microbiological standards; if used in pharmaceutical production, it must meet the more stringent USP<61>/<62> sterility or microbial limit requirements. Furthermore, the detection of heat-resistant Bacillus spp. is receiving increasing attention, as it may survive high-temperature processing and affect product stability.

B2B buyers should request suppliers to provide independent microbiological testing reports for each batch, rather than annual summary data. Simultaneously, they should confirm that the supplier's production facilities are GMP (Good Manufacturing Practice) certified and that packaging operations are conducted within an ISO 5-8 clean area to minimize the risk of secondary contamination.

Xi'an Sost Biotech Co., Ltd. has established a comprehensive microbiology laboratory equipped with biosafety cabinets and an automated colony counting system. Each batch of Shilajit extract undergoes comprehensive testing for total colony count, mold and yeast, E. coli, and Salmonella, ensuring a total colony count <1,000 CFU/g and zero detection of pathogenic bacteria. The company's production workshop is GMP certified and uses an HVAC air purification system to maintain a positive pressure clean environment, ensuring microbial safety from the source.

IV. What appearance and solubility specifications should buyers confirm?

Physicochemical properties directly affect the processing performance of Shilajit extract and the end-product experience. B2B buyers should specify the following physical specifications before purchasing:

4.1 Appearance and Sensory Indicators

Color: Dark brown to blackish-brown powder or resin, with a uniform color. A lighter color may indicate dilution or low content, while a darker color may indicate excessive ash.

Odor: Characteristic resinous odor with a slightly earthy fragrance. A pungent chemical odor suggests solvent residue or deterioration.

Texture: The powder should be fine and uniform, without lumps; the resin should be ductile and free of gritty texture.

4.2 Solubility and Particle Size Specifications

Solubility is a key indicator for assessing the purity and processing suitability of Shilajit extract:

Water Solubility: High-quality Shilajit extract should dissolve 100% in warm water, forming a dark brown, transparent solution with no visible residue or precipitation. Insoluble matter may indicate inorganic impurities or insufficiently purified raw materials.
Particle size distribution: Generally, 95% passing through an 80-mesh sieve (180 microns) is required. For soft capsules or liquid formulations, 100% passing through a 100-mesh sieve (150 microns) is recommended to ensure dispersibility.

4.3 Physicochemical parameter control

Xi'an Sost Biotech Co., Ltd.'s Shilajit extract undergoes fine grinding and sieving, achieving 100% passing through an 80-mesh sieve, ensuring excellent flowability in capsule filling, tablet compression, and liquid formulations. The product exhibits excellent water solubility, producing a clear, transparent solution without sediment, making it particularly suitable for high-end dosage forms such as ready-to-drink beverages, gummies, and oral liquids. The company offers customized particle size services, ranging from coarse powder to ultrafine powder (above 200 mesh), to meet the needs of various production processes.

V. How do SOST Biotech's Shilajit extract specifications meet buyer needs

As a leading global manufacturer of plant extracts, Xi'an SOST Biotech Co., Ltd. leverages its deep technological expertise and rigorous quality management system to provide B2B clients with Shiraiji extract solutions that meet the highest international standards.

5.1 Comprehensive Product Specifications
SOST Biotech offers a full range of Shilajit extract specifications to meet different market positioning and cost requirements:
Fulvic acid content: 5%, 10%, 20%, 40%, 50%, 60% and customized specifications
Product forms: fine powder, spray-dried powder, resin extract, granules
Packaging specifications: 1kg aluminum foil bags, 25kg cardboard drums, customized bulk packaging
All products are sourced from premium Shilajit raw materials from the high-altitude regions of the Himalayas (above 16,000 feet), using traditional water extraction processes combined with modern purification technology to maximize the retention of bioactive components.

5.2 International Certification and Compliance Assurance
SOST Biotech possesses a complete international certification system to ensure smooth product entry into major global markets:
Quality Management System: ISO 9001:2015, ISO 22000:2018
Food Safety: HACCP Certification
Halal & Kosher Certification: Halal, Kosher
Organic Certification: USDA NOP, EU Organic (optional)
Production Standards: GMP-certified factory
The company's products comply with FDA 21 CFR Part 111 dietary supplement GMP requirements, EU Novel Food regulations, and Health Canada natural health product standards, providing clients with complete technical support documentation (Technical Dossier) for international registration.

5.3 Advanced Testing and Quality Control Capabilities
SOST Biotech has invested in and established a CNAS-accredited laboratory, equipped with:
HPLC (High Performance Liquid Chromatography): for precise detection of fulvic acid and humic acid content
ICP-MS (Inductively Coupled Plasma Mass Spectrometry): for trace heavy metal analysis, with detection limits down to the ppb level
GC-MS (Gas Chromatography-Mass Spectrometry): for pesticide and solvent residue detection
Microbiology Laboratory: fully automated colony counting system and biosafety cabinet
Each batch of Shilajit extract undergoes 36 quality tests, including active ingredients, heavy metals, microorganisms, pesticide residues, solvent residues, and physical properties, ensuring product consistency, safety, and compliance.

5.4 Flexible B2B Services and Supply Chain Advantages

For B2B clients' bulk purchasing needs, SOST Biotech offers:

Customized Formulation Services: Adjusting specifications and excipients according to the client's end-product requirements

OEM/ODM Support: Providing contract manufacturing services for dosage forms such as capsules, tablets, and gummies

Global Logistics Network: Warehousing centers in China and the United States support rapid delivery

Document Support: Providing a complete set of export documents including COA, MSDS, Certificate of Origin, and Certificate of Free Sale

VI. How to Obtain the Latest Shilajit Extract Certificate of Analysis (COA) and Quotation?

For B2B buyers, obtaining the latest, batch-specific Certificate of Analysis (COA) is a direct way to assess supplier transparency and product quality.

B2B buyers should provide the following information when contacting suppliers to obtain an accurate quote:

Target Specifications: Fulvic acid content percentage, product form (powder/resin)
Purchase Quantity: Initial trial order and estimated annual purchase quantity (MOQ typically starts from 1kg)
Target Market: To help suppliers confirm compliance requirements and certification needs
Special Requirements: Such as organic certification, customized packaging, specific testing items
Contact SOST Biotech for professional support:
Business Inquiry Email: ericyang@xasost.com
Company Address: High-tech Zone, Xi'an, Shaanxi Province, China