In the bustling world of natural health and wellness, few ingredients have stood the test of time like silymarin. Extracted from the seeds of the milk thistle plant ( Silybum marianum ), this powerful compound has earned its reputation as a cornerstone of liver support supplements, pharmaceutical formulations, and even skincare products. But as demand for high-quality botanical extracts grows, so does the challenge of finding suppliers you can trust. Whether you're a small supplement brand sourcing bulk ingredients or a pharmaceutical company in need of pharmaceutical-grade silymarin, the right partner can make or break your product's success. That's why we've scoured the country to bring you the top 10 silymarin suppliers, manufacturers, wholesalers, and traders in the United States—each vetted for quality, reliability, and a commitment to excellence.
| Supplier Name | Location | Key Certifications | Silymarin Purity Range | Minimum Bulk Order |
|---|---|---|---|---|
| Nature's Extract Co. | Oregon | USDA Organic, GMP, ISO 9001 | 80-95% | 50kg |
| PharmaBulk Solutions | New Jersey | FDA Registered, cGMP | 90-98% | 100kg |
| GreenRoot Botanicals | California | Organic Certified, Kosher | 70-95% | 25kg |
| Herbal Essence Labs | Texas | GMP, Halal, ISO 14001 | 85-95% | 50kg |
| PureExtract Industries | Illinois | FDA Inspected, Non-GMO Project Verified | 80-98% | 75kg |
| Botanical Bulk Traders | Georgia | GMP, SQF Certified | 75-90% | 100kg |
| Wellness Extracts LLC | Colorado | USDA Organic, GMP | 85-95% | 30kg |
| BioActive Ingredients Inc. | North Carolina | FDA Registered, ISO 22000 | 90-98% | 50kg |
| EcoHerb Supply Co. | Washington | Organic Certified, Fair Trade | 70-90% | 20kg |
| Global Extract Solutions | Florida | cGMP, ISO 9001, Halal | 85-98% | 100kg |
1. Nature's Extract Co. (Oregon)
Nestled in the lush Willamette Valley of Oregon, Nature's Extract Co. has been a pioneer in organic botanical extracts since 1998. What sets them apart? A dedication to sustainability that starts at the source: they partner with family-owned farms in the Pacific Northwest to grow milk thistle without synthetic pesticides or fertilizers. Their silymarin extraction process uses cold-press technology, preserving the compound's potency while reducing energy consumption—a win for both quality and the planet.
For businesses prioritizing organic credentials, Nature's Extract Co. is a standout. Their silymarin is USDA Organic certified, with purity levels ranging from 80% to 95%, making it ideal for premium supplements and natural skincare lines. They also offer custom formulations, such as water-soluble silymarin for beverages or micronized powder for easy blending into capsules. And with a minimum bulk order of just 50kg, they're accessible to small and mid-sized brands alike.
2. PharmaBulk Solutions (New Jersey)
When precision and pharmaceutical-grade quality are non-negotiable, PharmaBulk Solutions in New Jersey delivers. Founded in 2005, this FDA-registered facility specializes in high-purity botanical extracts for the pharmaceutical and nutraceutical industries. Their silymarin is produced in a cGMP-compliant environment, with purity levels hitting 98%—among the highest in the market.
What makes PharmaBulk a top choice for large-scale buyers? Their production capacity is unmatched: they can process up to 5,000kg of silymarin per month, with lead times as short as 10 business days for rush orders. They also offer a range of particle sizes, from fine powder (50 mesh) to coarse granules, ensuring compatibility with various manufacturing processes. And for clients in regulated industries, their documentation package includes DMF (Drug Master File) support and full traceability from seed to shipment.
3. GreenRoot Botanicals (California)
For brands that value flexibility and personalized service, GreenRoot Botanicals in California is a hidden gem. This family-run business, started in 2010, prides itself on being a "small enough to care, large enough to deliver" supplier. They specialize in organic and conventional silymarin, with purity levels from 70% (ideal for budget-friendly supplements) to 95% (for high-end formulations).
One of GreenRoot's standout features is their low minimum order: just 25kg, making them perfect for startups or businesses testing new products. They also offer private labeling services, helping brands launch their own silymarin-based supplements without the hassle of in-house manufacturing. Their team works closely with clients to adjust extract ratios—for example, blending silymarin with other liver-supporting herbs like dandelion or artichoke—at no extra cost.
4. Herbal Essence Labs (Texas)
Based in Houston, Texas, Herbal Essence Labs has built a reputation for innovation in botanical extraction. Since 2012, they've invested in cutting-edge supercritical CO2 extraction technology, which uses pressurized carbon dioxide to extract silymarin without harsh solvents. The result? A cleaner, more stable product with a longer shelf life—up to 36 months when stored properly.
Their silymarin is Halal and Kosher certified, opening doors to global markets, and their ISO 14001 certification reflects a commitment to eco-friendly practices, including waste reduction and renewable energy use in their facility. For clients in the food and beverage industry, they offer liquid silymarin extracts (in concentrations of 10-20%) that blend seamlessly into juices, smoothies, and functional drinks.
5. PureExtract Industries (Illinois)
PureExtract Industries in Chicago is all about transparency. Walk into their facility, and you'll find a wall of screens displaying real-time data from their extraction process: temperature, pressure, and purity levels, all visible to visitors. This commitment to openness has made them a favorite among brands that prioritize ethical sourcing and manufacturing.
Their silymarin is Non-GMO Project Verified and sourced from non-GMO milk thistle seeds grown in the Midwest. Purity ranges from 80% to 98%, with a focus on consistency—they guarantee less than 2% variation between batches. For bulk buyers, they offer flexible payment terms and a loyalty program that reduces costs for repeat orders over 500kg annually.
6. Botanical Bulk Traders (Georgia)
As the name suggests, Botanical Bulk Traders in Atlanta specializes in large-scale orders, making them a go-to for national supplement chains and international distributors. Founded in 2001, they've built a global network of milk thistle suppliers, allowing them to offer competitive pricing on bulk silymarin (minimum order: 100kg).
Their SQF certification (Safe Quality Food) ensures strict food safety standards, and they're one of the few suppliers in the U.S. that can handle ocean freight logistics, simplifying international shipments. They also stock pre-packaged silymarin in 25kg drums, reducing lead times to just 3-5 business days for in-stock orders.
7. Wellness Extracts LLC (Colorado)
Wellness Extracts in Boulder, Colorado, is a favorite among eco-conscious brands. Their facility runs on 100% renewable energy, and they offset their carbon footprint by donating a portion of profits to reforestation projects. Their silymarin is USDA Organic certified and extracted using ethanol derived from organic sugarcane, avoiding synthetic solvents entirely.
While their minimum order is 30kg, they offer a "sustainability discount" for brands that commit to annual orders, reducing costs by 10% for clients who share their environmental values. They also produce a unique "whole-plant" silymarin extract, which includes other beneficial compounds from milk thistle (like flavonoids and fatty acids) for enhanced synergistic effects.
8. BioActive Ingredients Inc. (North Carolina)
BioActive Ingredients in Raleigh focuses on science-backed botanical extracts, and their silymarin is no exception. They partner with universities to fund research on silymarin's benefits, and their team includes a PhD in pharmacognosy (the study of medicinal plants) who consults with clients on formulation development.
Their ISO 22000 certification ensures a robust food safety management system, and they offer custom encapsulation services—turning silymarin powder into ready-to-sell capsules in sizes from 250mg to 1000mg. For pharmaceutical clients, they can produce silymarin with ultra-low heavy metal levels (<0.1ppm), meeting strict USP standards.
9. EcoHerb Supply Co. (Washington)
EcoHerb Supply Co. in Seattle is a Fair Trade certified supplier, ensuring that the farmers who grow their milk thistle receive fair wages and safe working conditions. Their silymarin is organic and ranges in purity from 70% to 90%, with a focus on affordability without sacrificing ethics.
They're known for their flexibility: minimum orders start at 20kg, and they offer payment plans for small businesses. They also produce a "silymarin plus" blend, combining the extract with turmeric and ginger for anti-inflammatory supplements—a popular trend in the wellness space.
10. Global Extract Solutions (Florida)
Rounding out our list is Global Extract Solutions in Miami, a hub for international trade. With a focus on global distribution, they specialize in exporting U.S.-made silymarin to markets like Europe, Asia, and Latin America. Their Halal and ISO 9001 certifications make them compliant with diverse international regulations.
They offer a range of packaging options, from food-grade bags to drum liners suitable for long sea voyages, and their logistics team handles customs documentation, making international shipping hassle-free. Their silymarin is available in both powder and liquid forms, with purity levels up to 98% for pharmaceutical clients.
