Top 10 Milk Thistle Extract Suppliers, Manufacturers, Wholesalers, and Traders in United States

Founded in 2005, GreenHarvest Botanicals has built a reputation as a go-to for high-quality bulk botanical extracts, and their milk thistle extract is no exception. Based in Oregon, they source their milk thistle seeds from organic farms in the Pacific Northwest, where the cool, rainy climate is ideal for growing potent plants. What sets them apart? Their commitment to sustainable farming practices—they work directly with farmers to ensure crops are grown without synthetic pesticides or fertilizers, resulting in USDA Organic-certified extracts. GreenHarvest offers both powder and liquid milk thistle extract, with silymarin concentrations ranging from 80% to 95%, making it versatile for different applications. Whether you're a supplement manufacturer needing bulk powder for capsules or a cosmetic brand looking for liquid extract for serums, they've got you covered. Their minimum order is 50kg, which might seem steep, but for businesses scaling up, their wholesale pricing (which drops as order size increases) makes them a cost-effective choice. They also provide third-party lab reports with every shipment, so you can verify purity and potency—no guesswork involved.

If consistency is your top priority, PureNature Extracts Inc. (founded in 2010) is worth a look. Based in California, this manufacturer specializes in standardized botanical extracts, and their milk thistle extract is held to strict quality control standards. Every batch is tested to ensure silymarin content is exactly as advertised (typically 80% or 90%), so you know you're getting the same potency every time. They also offer organic botanical extracts for brands that want to cater to the clean-label market, with USDA Organic and Kosher certifications to back it up. PureNature's sweet spot is mid-sized orders—their minimum is 25kg, which is more accessible for small to medium businesses than some larger wholesalers. They pride themselves on quick turnaround times, too; most orders ship within 3–5 business days, which is a lifesaver if you're tight on inventory. What's unique about their process? They use a cold-extraction method to preserve the integrity of silymarin, which some studies suggest may enhance bioavailability compared to heat-based methods. For brands focused on efficacy, that's a big plus.

A veteran in the industry, Herbal Essence Labs has been around since 1998, and their longevity speaks to their reliability. Based in Illinois, they're one of the few suppliers on this list that focuses exclusively on botanical extracts wholesale, making them a favorite among large-scale manufacturers. Their milk thistle extract is sourced from both domestic and European farms (they work with growers in Germany and Hungary, known for high-quality milk thistle), and they offer a range of silymarin concentrations, from 60% to 95%. What really stands out about Herbal Essence Labs is their commitment to transparency. They provide full traceability for every batch, including where the seeds were grown, how they were extracted, and what testing was done. They're also NSF-certified, which is a big deal for supplement brands needing to comply with strict industry regulations. The downside? Their minimum order is 100kg, which is best suited for businesses with consistent, high-volume needs. But if you can meet that threshold, their wholesale pricing is hard to beat—they often run bulk discounts for orders over 500kg.

For businesses that need a little flexibility, BioExtract Solutions (founded in 2012) is a great fit. This Colorado-based manufacturer specializes in custom formulations, so if you need milk thistle extract blended with other botanicals (like dandelion root or artichoke leaf for a liver-support complex), they can do that. They also offer high-potency extracts, with silymarin levels up to 98%, which is ideal for premium supplement lines. BioExtract's minimum order is just 10kg, making them accessible for startups or small brands testing new products. They're GMP and Halal certified, so they cater to a wide range of markets, including international clients. One thing customers love? Their customer service—they assign a dedicated account manager to each client, so you're never just a number. They also offer sample sizes (1kg) for testing, which is helpful if you want to verify quality before committing to a large order. Whether you need powder, liquid, or even encapsulated extracts, BioExtract can tailor their products to your specs.

As the name suggests, Nature's Bounty Supply Co. (founded 2008) is all about organic, natural ingredients. Based in Vermont, they source their milk thistle seeds from organic farms in the Northeast, where the soil is rich in nutrients, and the plants are grown without synthetic inputs. Their organic milk thistle extract is USDA Organic and Non-GMO Project Verified, making it a hit with brands targeting health-conscious consumers. They offer both powder and bulk powder options, with silymarin concentrations of 80% and 90%. What's unique about their process? They use a water-based extraction method, which avoids harsh solvents and results in a cleaner-tasting extract—great for brands making liquid supplements or functional beverages. Their minimum order is 30kg, which is reasonable for mid-sized brands, and they offer free shipping on orders over 100kg. They also prioritize sustainability, using recyclable packaging and offsetting their carbon footprint through reforestation projects. For brands that want to align with eco-friendly values, Nature's Bounty is a standout choice.

Botanical Innovations LLC, founded in 2015, is a newer player but has quickly made a name for itself with its focus on innovation. Based in North Carolina, they specialize in milk thistle extract for both supplements and cosmetics—yes, you read that right. Their extracts are gentle enough for skincare products (think serums and creams targeting liver health from the inside out, or topical formulas for antioxidant support). They offer both standard and organic options, with silymarin levels ranging from 70% to 95%. What makes them unique? They use a proprietary extraction process that preserves not just silymarin, but other beneficial compounds in milk thistle, like flavonoids and antioxidants. This "full-spectrum" approach is popular with brands that want to highlight the extract's holistic benefits. Their minimum order is just 5kg, which is perfect for small-batch producers or startups. They're also cGMP and ISO 22000 certified, ensuring strict quality control. Plus, they offer private labeling services, so you can get your product to market faster without investing in your own manufacturing facilities.

If you're looking for a global reach with a local touch, Global Extract Traders (founded 2001) fits the bill. Based in Texas, they import milk thistle extract from top manufacturers in Europe and Asia, but also work with domestic growers in the U.S. This dual sourcing model allows them to offer competitive pricing and a steady supply, even during crop shortages. They specialize in botanical extracts wholesale, making them a favorite among large distributors and retailers. Global Extract Traders offers a wide range of milk thistle products, including standardized extracts (80–95% silymarin), crude extracts, and even milk thistle seed oil. Their certifications include SQF (Safe Quality Food) and Organic, so you can trust the safety and quality of their products. Their minimum order is 200kg, which is best for big-box retailers or large supplement brands, but they offer volume discounts that can significantly lower per-kilogram costs. They also have a dedicated logistics team to handle international shipping, making them a great partner if you're exporting products to other countries.

Healthy Roots Extracts, founded in 2018, is a small-batch manufacturer with a big focus on sustainability. Based in Washington state, they work with family-owned farms to source milk thistle seeds, ensuring fair wages and eco-friendly practices. Their milk thistle extract is USDA Organic and Fair Trade certified, appealing to brands that want to tell a story about ethical sourcing. They offer both powder and liquid extracts, with silymarin concentrations of 80% and 90%. What's special about their process? They use solar-powered extraction facilities, reducing their carbon footprint, and their packaging is 100% compostable. Their minimum order is just 5kg, making them ideal for boutique brands or Etsy sellers looking for high-quality, eco-friendly ingredients. They also offer educational resources for their clients, like marketing materials highlighting the sustainability of their supply chain—helping brands connect with conscious consumers. While they're smaller than some of the other suppliers on this list, their commitment to quality and ethics has earned them a loyal following.

A staple in the Midwest since 1998, Midwest Botanicals has built its reputation on reliability and consistency. Based in Iowa, they source milk thistle seeds from local farmers, supporting the regional agricultural economy. They specialize in bulk botanical extracts, with milk thistle being one of their top sellers. Their extract is available in powder form, with silymarin levels of 80% and 90%, and they also offer custom blends for specific applications. Midwest Botanicals is GMP certified and gluten-free, making their products suitable for a wide range of dietary needs. Their minimum order is 100kg, which is geared toward large manufacturers, but they offer flexible payment terms for long-term clients. What customers appreciate most is their dependability—they rarely have stockouts, thanks to their large warehouse and strategic sourcing. They also provide same-day shipping for orders placed before noon, which is a lifesaver for businesses facing unexpected inventory gaps. If you're looking for a no-fuss, reliable supplier with deep roots in the U.S. agricultural community, Midwest Botanicals is a solid choice.

Rounding out our list is Coastal Extracts & Traders, founded in 2014 and based in Florida. As their name suggests, they're a trading company that partners with top manufacturers across the U.S. to offer a curated selection of botanical extracts, including milk thistle. They specialize in wholesale distribution, so they can connect you with the right manufacturer for your needs—whether you're after organic, high-potency, or budget-friendly extracts. Coastal Extracts offers both liquid and powder milk thistle extract, with silymarin concentrations from 60% to 95%. Their certifications include ISO 13485 (for medical devices) and Organic, making them a good fit for pharmaceutical and cosmetic brands. Their minimum order is 50kg, and they offer competitive pricing by leveraging their network of manufacturers. They also provide value-added services like custom packaging and labeling, which can save you time and money on production. For businesses that want a one-stop shop for all their botanical extract needs, Coastal Extracts & Traders is a convenient and reliable partner.