Top 15 Assessed Supplement Contract Manufacturers (2026)

Captek Softgel International (CSI) specializes in softgel and gummy manufacturing from facilities in Cerritos, Vista, and La Mirada, California. Founded in 1996, the company employs roughly 700 people and has produced over 4,000 formulations. They developed MarineGel, a marine-sourced softgel alternative to traditional bovine and porcine gelatin. This product is naturally suited for Halal and Kosher markets. Captek reports SQF certification for its 60,000 sq ft gummy facility in La Mirada with a starch-free production line. They hold independently confirmed NSF GMP certification and report NSF GMP for Sport designation. The company maintains over 160 bulk stock SKUs with low minimum order quantities for brands that want to launch quickly. Captek received private equity investment from Swander Pace Capital. They are one of the largest independent softgel contract manufacturers in the United States.

GMP Laboratories of America is a contract manufacturer of dietary supplements and homeopathic drug products based in Anaheim, California, operating since 1994. The company runs two facilities totaling over 100,000 square feet within the Anaheim Center for Advanced Technology. GMP Labs produces capsules, tablets, powders, liquids, and gummies, with a stated hard-shell encapsulation capacity exceeding 400 million capsules per month. The company holds USDA Organic certification through CCOF and NSF GMP for Sport registration. GMP Labs offers end-to-end services from custom formulation and R&D through manufacturing, packaging, and labeling, including Amazon FBA-compliant packaging and blister card packaging.

Kelker Pharma, Inc. is a contract manufacturer of dietary supplements based in Riverside, California, operating from a 75,000-square-foot facility. Founded by Tariq Kelker, M.D. (a trauma surgeon and formulation specialist), the company manufactures capsules, tablets, powders, and nutritional bars for brands in sports nutrition, weight management, and general health. The company reports a production capacity of 10 million capsules and 5 million tablets per day. In 2025, Kelker launched its own consumer brand, NUTRILINQ, focused on nutritional support for GLP-1 medication users. Kelker claims cGMP, FDA registration, USDA Organic (via Oregon Tilth), and NSF GMP/Sport certifications. NSF/ANSI 455-2 (GMP) and USDA Organic certifications were independently confirmed through public directory searches; remaining certifications are self-reported.

Robinson Pharma operates over 1 million sq ft of manufacturing space across eight to nine facilities in Santa Ana and Costa Mesa, California. Founded in 1989, the company has the largest softgel production capacity in the United States. Their facilities produce 23 billion softgels, 7 billion gummies, and 5 billion tablets and capsules per year. Robinson Pharma reports certifications from NSF, UL, and Eurofins, and carries ISO 9001:2015 and SQF credentials, though NSF and USP could not be confirmed through their respective public directories as of March 2026. USDA Organic certification has been independently confirmed via the USDA Organic Integrity Database. The company recently expanded with new high-speed liquid production lines and additional tablet capabilities. They serve brands that need high-volume production runs with claims of the shortest lead times in the industry. Their facility count has grown from seven to nine buildings in recent years, funded partly by a $40.7 million property acquisition.

Arizona Nutritional Supplements is a contract manufacturer of dietary supplements located in Chandler, Arizona, with over 30 years of operating history. The company operates a 250,000+ square foot manufacturing facility and produces capsules, tablets, softgels, powders, and gummies. Arizona Nutritional holds multiple certifications including NSF GMP, NSF Certified for Sport, Informed Choice, USDA Organic (QAI), Kosher, Halal, and Health Canada Natural Product Number registration. The company is a member of the Direct Selling Association (DSA) and the Chandler Chamber of Commerce. Arizona Nutritional serves both domestic and international markets, with regulatory approvals spanning the US, Canada, and Australia (through applicable certifications).

Bactolac Pharmaceutical operates 650,000 sq ft of manufacturing space in Hauppauge, New York. Founded in 1995, the company is one of the largest full-service supplement manufacturers on Long Island. They handle every step in-house, from product development through final packaging and label application. Bactolac holds independently confirmed NSF GMP certification, and reports additional certifications from UL, NPA, and QAI (USDA-accredited organic certifier). Their product range covers standard capsules and tablets as well as specialty formats like sublingual tablets, enteric-coated capsules, and stick packs. The company has developed expertise in emerging supplement categories including nootropics, longevity products, and pet supplements. They can support brands seeking NSF for Sport, organic, or Non-GMO Project verification for their finished products. Their in-house testing lab runs quality control without relying on outside laboratories.

Best Formulations has manufactured dietary supplements and softgels from City of Industry, California since 1984. The company was acquired by Sirio Pharma in 2023 and now operates as Sirio Americas. This gives them access to a global network spanning Asia and Europe. Best Formulations is one of the largest plant-based softgel manufacturers in the United States. They specialize in difficult paste-style softgel formulas and probiotic handling. The company holds an FDA drug license, which is a higher regulatory standard than standard dietary supplement registration. Their four Southern California facilities total over 120,000 sq ft. They also report NPA GMP certification and NSF GMP for Sport designation, making them suitable for sports nutrition brands. The Sirio acquisition brings institutional-grade resources but may add corporate complexity for smaller brands.

Makers Nutrition operates a 177,000 sq ft FDA-registered facility in Commack, New York. They focus on startups and emerging brands with some of the lowest minimum order quantities in the industry. Their turnkey model covers every step from formulation through fulfillment. The company offers over 100 stock formulas for private label products. Custom formulation is available for brands that need unique products. Their NSF-certified cGMP facility can produce up to 200,000 bottles per day. Design services include label creation and packaging. They also handle warehousing and order fulfillment for direct-to-consumer brands. Founded in 2014, they have grown quickly by serving brand owners who are launching their first supplement products.

Supplement Manufacturing Partners (SMP Nutra) operates a 155,000 sq ft facility in Largo, Florida. The company holds NSF 455-2 certification and manufactures over 800 stock products for private label customers. Their products have appeared on shelves at Walmart, Target, The Vitamin Shoppe, and GNC. SMP Nutra offers one of the most accessible entry points for new brands. Stock products start at 1,000 bottles, and custom manufacturing begins at 1,500 to 2,000 bottles. The company recently relocated its headquarters from New York to Pinellas County, Florida, with a ribbon-cutting ceremony covered in industry press. SMP Nutra covers all major dosage forms and provides full-service manufacturing from formulation through finished product. Their stock catalog lets brands launch quickly while custom formulation serves those with unique products.

Summit Rx operates a 47,000 sq ft FDA-registered facility in Bayonne, New Jersey. Founded in 2012 by pharmacist Sam Salia, the company brings a pharmaceutical perspective to supplement manufacturing. They report holding USDA Organic certification and maintain ISO Class 8 cleanroom suites with HEPA filtration, which exceeds what most supplement manufacturers offer. Summit Rx specializes in organic supplement production with capabilities across gummies, capsules, and custom-blended powders. They advertise low minimum order quantities and flexibility for both small and large batch production. The pharmacist-led approach means formulations go through clinical review before production. The company markets to both emerging brands and established companies looking for organic-certified manufacturing.

Vitalpax operates an FDA-registered, cGMP-compliant facility in La Verkin, Utah. Founded in 2014, they hold NSF, USDA Organic, Halal, and Kosher certifications. Their facility produces capsules, tablets, softgels, powders, stick packs, liquids, and concentrates. They offer in-house R&D with access to over 7,000 ingredients, third-party testing (HPLC, FTIR), and Amazon registration support. They serve brands of varying sizes with both large and small batch capabilities. The company is a member of NPA and NASC, and is BBB accredited.

Vitaquest International has manufactured dietary supplements for over 40 years from its three facilities in West Caldwell, New Jersey. The company was the first nutraceutical manufacturer in the United States to earn FSSC 22000 certification. They report holding USP Quality Systems GMP verification, a higher standard than typical cGMP compliance, though USP Verified status could not be confirmed through the USP Verified Products directory as of March 2026. Vitaquest serves over 500 brands globally and produces more than 4,000 products. Their capabilities include specialty dosage forms like effervescent tablets, orally disintegrating tablets, and microencapsulated ingredients. A dedicated particle engineering facility handles complex formulations that most manufacturers cannot produce. The company employs 500 to 700 people and produces roughly 3 billion capsule doses and 2 billion tablet doses per year. Lead times run 12 to 16 weeks for first-time orders, longer than smaller manufacturers but typical for this scale of operation.

American Health Formulations (AHF) operates a 45,000+ sq ft facility at 45 Adams Avenue in Hauppauge, New York. Founded in 2007, they report NSF cGMP certification and NSF Certified for Sport designation, and also hold Halal registration. Their FDA-registered facility includes in-house R&D, analytical, and stability laboratories. The company serves both dietary supplement and OTC product brands with custom formulation, manufacturing, packaging, and regulatory consulting. Their team has over 75 years of combined industry experience.

BL Bio Lab is a dietary supplement contract manufacturer operating a 75,000-square-foot facility in Clearwater, Florida. The facility reports NSF certification under NSF/ANSI 455-2, is FDA registered, and ISO compliant. BL Bio Lab provides all quality control, regulatory, and lab testing in-house. The company manufactures private label, white label, custom, and bulk supplements. Their collective team has over 100 years of combined experience in dietary supplement manufacturing. BL Bio Lab maintains a CBD/THC-free facility, which ensures no cross-contamination risk for supplement brands that need to guarantee their products are free of these compounds. The company offers low MOQ options for startup and emerging brands.

Catalyst Nutraceuticals is a dietary supplement contract manufacturer headquartered in Buford, Georgia. The company operates a high-capacity facility at 1720 Peachtree Industrial Blvd and offers manufacturing, custom formulation, and proprietary flavoring services across sports nutrition, herbal, and vitamin product categories. The facility houses high-speed encapsulation machines, packaging lines, stick and gusseted bag machines, an in-house testing laboratory, and a full research and development department. Catalyst is a portfolio company of MSouth Equity Partners, a private equity firm. The company was founded in 2015 and employs approximately 57 people. Catalyst holds NSF/ANSI 455-2 GMP certification and UL certification.

Eva Nutra is a privately owned nutraceutical contract manufacturer operating a 92,000-square-foot facility in Las Vegas, Nevada. The company is NSF cGMP certified, FDA registered, and USP audited. Eva Nutra's facility has a production capacity of over 50 million capsules per week. The company specializes in two-piece capsules, chewable tablets, and fast-melt tablets — the fast-melt format being a less common capability among supplement CMs. Eva Nutra is listed in Vitamin Retailer Magazine's buyer's guide as an established manufacturer. The facility maintains cGMP-certified in-house laboratories for quality control testing.

Gemini Pharmaceuticals has produced tablets, capsules, and OTC pharmaceuticals from Commack, New York for over 30 years. The company produces 13 billion dosage units per year and packages over 150,000 bottles per shift. They report FDA registration, Health Canada site licensing, TGA (Australia) listing, and NSF International certification, though NSF could not be confirmed through NSF's public GMP directory as of March 2026. Gemini was the first manufacturer to earn RIBUS Certified Contract Manufacturer status for clean label products. They recently received approval for a $25 million expansion supported by Suffolk County IDA incentives. This expansion includes a new probiotic supplement facility at 81 Modular Avenue. Their 300,000 unit minimum order signals they serve mid-to-large brands, not startups. The ISO 17025 accredited in-house laboratory handles identity testing, potency analysis, and stability studies.

Intermountain Nutrition is a high-capacity nutraceutical contract manufacturer located at 195 North 1950 West, Salt Lake City, Utah. The company is FDA registered, reports SQF certification, and has received an NSF Grade A audit rating. Intermountain Nutrition operates nine dedicated encapsulation rooms for high-volume capsule manufacturing and supports bulk powder manufacturing for tubs, sticks, and bags. The company conducts on-site third-party testing for identity, potency, and purity. Their custom formulation process accounts for efficacy, bioavailability, taste, stability, regulatory compliance, cost targets, and scalability. Intermountain also offers flavoring and taste masking systems specifically designed for challenging supplement active ingredients. The company is listed in the Utah Department of Environmental Quality database.

Lief Labs operates over 220,000 sq ft of manufacturing space across two FDA-registered facilities in Valencia, California. The company claims USDA Organic certification and operates an ISO/IEC 17025 accredited microbiology lab. This in-house testing capability is unusual for contract manufacturers and allows faster quality control turnaround. They produce over 5 million capsules and 1 million tablets per day. Lief Labs reports holding NSF International cGMP certification since 2010, though this could not be confirmed through NSF's public GMP directory as of March 2026. Their product line includes organic-approved tablets, a category few competitors offer. The company also provides Non-GMO Project verification assistance for brands seeking that certification. They target emerging and entrepreneurial brands with minimum orders starting at 2,500 units.

Matsun Nutrition is an FDA-registered contract manufacturer based in Murrieta, California, specializing in liquid dietary supplements. Founded in 1992, they have over three decades of experience in liquid vitamin and supplement manufacturing. Their facility is cGMP and ISO 9001 certified with Eurofins registration. Product formats include liquid vitamins, drops, shots, powders, gummies, and capsules. They offer low minimum order quantities starting at 12 bottles for private label, with 1-2 day shipping on in-stock formulas and 24/7 facility operations for rush jobs. They also provide custom formulation, label design, product rendering, and fulfillment services.

Natural Alternatives International (NAI) is a publicly traded (NASDAQ: NAII) contract manufacturer of nutritional supplements headquartered in Carlsbad, California. Founded over 45 years ago, NAI provides formulation, manufacturing, and marketing support services for dietary supplement brands. The company specializes in private-label contract manufacturing and holds international regulatory approvals including NSF GMP, NSF Certified for Sport, TGA (Therapeutic Goods Administration, Australia), and Swissmedic. NAI reported $130 million in annual revenue for fiscal year 2025, with private-label contract manufacturing sales growing 17.7% year-over-year. The company also develops proprietary ingredients, including its beta-alanine products under the CarnoSyn and TriBsyn brands. NAI employs over 500 people and maintains manufacturing facilities in Southern California.

Nufacturing is a dietary supplement contract manufacturer located in Brunswick, Ohio. The company provides custom supplement and nutraceutical manufacturing and reports NSF GMP, SQF, and ISO 9001 certifications for its facility. Services include turnkey manufacturing, custom formulation development, custom packaging, label design, co-packing, and white label manufacturing. Product categories include supplements, nutraceuticals, oils, creams, and powders. Nufacturing holds NSF Certified for Sport designation, which requires additional testing for banned substances in finished products. The facility's production capacity reaches up to 1,000,000 units per week. All products are third-party tested through ISO 17025-accredited laboratories.

Nutra Manufacturing is one of the largest fully integrated dietary supplement contract manufacturers in the United States, operating 950,000 square feet of manufacturing space across facilities in Greenville and Anderson, South Carolina. The company produces tablets, capsules, and softgels, manufacturing over 11,000 custom dosage formulations per year. Originally the manufacturing division of GNC, Nutra Manufacturing was acquired by International Vitamin Corporation (IVC) in 2019 for approximately $176 million. The company serves both contract manufacturing clients and private label customers. FDA inspected in 2009 and 2010 with no Form 483 observations issued.

NutraPak USA is an FDA-registered, cGMP-certified contract manufacturer based in Carlstadt, New Jersey. Their facility supports softgels, gelcaps, caplets, tablets, capsules, powders, and liquid packaging including blister packing and pouch filling. The company employs laboratory scientists and formulators providing in-house R&D, quality control testing, and product analysis. Quality protocols include raw materials testing, environmental monitoring, packaging QA, active ingredient assays, dissolution testing, bio-absorbability analysis, microbiological purity testing, and GMO testing. They offer turnkey private-labeling services.

NutraScience Labs brings over 50 years of nutraceutical manufacturing experience from its facilities on Long Island, New York. The company is a subsidiary of Twinlab Consolidation Corporation (OTCPK: TLCC). They specialize in powder flavoring and offer a wide range of dosage forms. The company claims NSF-certified cGMP status across both east and west coast manufacturing sites. Every account receives a dedicated manager available around the clock. The company handles everything from formulation through packaging and fulfillment. NutraScience Labs is known for producing custom powder blends with complex flavor profiles. They provide 48-hour turnaround on price quotes for new projects.

NutriSport Pharmacal (NSP) is a dietary supplement contract manufacturer founded in 1997 by Vince Paternoster, who brought OTC pharmaceutical manufacturing quality standards to the supplement industry. The company's FDA-registered, GMP-certified facility in New Jersey produces capsules, tablets, powders, softgels, and liquids. NSP is independently audited by clients and certified by the Natural Foods Association for FDA cGMP compliance. Their in-house Analytical Laboratory conducts raw material and finished product testing per 21 CFR Part 111 requirements. The facility is regularly inspected by both FDA and the New Jersey Department of Health. NSP specializes in private-label nutraceuticals and custom supplement manufacturing for emerging and established brands.

Pharmatech Labs is a contract manufacturer of liquid and powder supplements based in Lindon, Utah. Founded in 2013, the company specializes in liquid supplement formats including ready-to-drink (RTD) beverages, energy shots, oils, tinctures, and CBD products. Packaging options range from 0.5 oz to 32 oz in aluminum or plastic containers, with shot formats available in 2 oz, 2.5 oz, and 3 oz sizes. Services span concept development, research and development, customization, manufacturing, packaging, fulfillment, and storage. Production methods include compounding, pasteurization, filling, capping, and labeling. Pharmatech Labs holds FDA registration, NSF certification, and CCOF (California Certified Organic Farmers) organic certification.

Pro Safe Nutritionals is an NSF-GMP and FDA-registered dietary supplement manufacturer offering turnkey OEM/ODM services with competitive minimum order quantities starting at 3,000 units for most capsules, tablets, and oral liquids (gummies and specialized formulations start at 5,000 units). The company holds certifications including HACCP, ISO 22000, and Halal/Kosher compliance. Product capabilities include gummy vitamins, capsules, tablets, softgels, and liquid supplements. Pro Safe positions itself as a partner for both emerging brands and established companies, with tiered pricing that scales with volume.

Rose City Nutritionals is a contract manufacturer of dietary supplements founded in 2019 and based in Vancouver, Washington. The company operates a 50,000-square-foot, climate-controlled facility equipped with eight high-speed encapsulation and packaging machines, producing two-piece capsules, uncoated tablets, and powders. Rose City Nutritionals is FDA-registered (FEI 3015539859) and received one Form 483 during its only FDA inspection in September 2023, with no warning letters issued. The company claims NSF and UL certifications on its website, though neither could be independently verified through public directories as of March 2026.

Sawgrass Nutra Labs is a dietary supplement contract manufacturer based in Jacksonville, Florida. Founded in 2018, the company expanded from its original facility to a 40,000-square-foot space in 2024. Sawgrass is FDA registered and cGMP certified, offering turnkey services from R&D and formulation through manufacturing, testing, packaging, warehousing, and fulfillment. The company produces capsules, liquids, and powders. Every batch is tested by independent third-party labs for potency, purity, and safety. Sawgrass has a ThomasNet company profile providing independent verification of their business and location. The company serves both custom formulation and private label clients.

SRK Nutritionals is a dietary supplement contract manufacturer and packager based in Ronkonkoma, New York. The company's facility is FDA registered, NSF approved, and GMP certified. SRK Nutritionals provides comprehensive services from formulation and R&D through manufacturing, packaging, and private labeling. Their product range covers capsules, tablets, gummies, powder, softgels, and liquid supplements across categories including multivitamins, probiotics, prebiotics, herbal extracts, collagen, protein, creatine, fiber, enzymes, nootropics, and omega-3. SRK Nutritionals has a ThomasNet profile and serves retailers, wholesalers, and online sellers.

Sun-Pac Manufacturing is a dietary supplement contract manufacturer located in Tampa, Florida, operating since 2000. The company specializes in stick pack supplement manufacturing using filling and sealing technology for on-the-go supplement formats. Sun-Pac produces capsules, tablets, powders, stick packs, pouches, and gusset bags. The company holds NSF, USDA Organic, Halal, and HACCP certifications and is cGMP compliant. Sun-Pac serves both the human supplement and pet supplement markets, with capabilities spanning nutritional supplements, sports nutrition, and energy products. Packaging configurations include wide mouth packers, gusset bags, pouches, and slim stick packs.

Tishcon Corporation is a BIPOC-owned dietary supplement contract manufacturer founded in 1976 and headquartered in Westbury, New York, with additional facilities in Maryland. The company specializes in softgel encapsulation with a production capacity of over 1.5 billion softgels per year from their Westbury facility. Tishcon is certified by NSF and UL, FDA registered, and holds Halal and Kosher certifications. The company also manufactures tablets, capsules, powders, and chewables. Tishcon maintains in-house R&D laboratories and quality control testing capabilities including qualitative, quantitative, and microbiological testing. The company has nearly five decades of manufacturing experience and serves retailers, wholesalers, and online sellers of nutrition products.