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Antioxidant Manufacturers

Last updated: February 2026

This directory lists 69 antioxidant manufacturers across the United States, from botanical extractors focusing on natural polyphenols to specialized chemical producers of synthetic antioxidant compounds.

Buyers typically engage these manufacturers to address critical formulation challenges such as preventing lipid oxidation in food products, stabilizing active pharmaceutical ingredients (APIs), extending the shelf life of cosmetics, or substantiating the efficacy claims for nutraceutical-grade supplements. Expertise in achieving specific polyphenol profiles or ensuring GRAS status for food applications is paramount.

The suppliers in this space often fall into distinct categories: those specializing in natural, plant-derived extracts (e.g., rosemary, green tea, grape seed), synthetic chemical manufacturers (e.g., BHA, BHT, TBHQ), and emerging biotechnology firms focused on fermentation-derived antioxidants. Their differentiation hinges on raw material sourcing transparency, extraction technologies (e.g., supercritical CO2 vs. solvent extraction), purity and concentration levels, and their ability to provide custom blends optimized for specific applications.

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Company Directory

69 companies nationwide

3V Sigma USA

Based in New York, NY, 3V Sigma USA manufactures specialty chemicals, focusing on high-performance antioxidants. Their solutions enhance product durability and provide protection against degradation from heat, light, and oxidation, optimizing material lifespan for industrial applications.

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A&B Ingredients, Inc.

Fairfield, NJ

Based in Fairfield, NJ, A&B Ingredients, Inc. develops plant-based, clean label ingredient solutions, including natural antioxidants, for the food and beverage industry. They focus on natural shelf life extension and food safety, pioneering new ingredient technologies through their R&D lab and applications team.

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American Health Formulations (AHF Vitamins)

Hauppauge, NY

Based in Hauppauge, NY, American Health Formulations (AHF Vitamins) is a contract manufacturer for dietary supplements and nutraceuticals. They provide custom formulation, private label, and product development. AHF produces various product types, including antioxidant supplements, immune support, and sports nutrition.

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Blue California

Rancho Santa Margarita, CA

Based in Rancho Santa Margarita, CA, Blue California designs and produces innovative, sustainable custom ingredient solutions. They specialize in science-backed health, wellness, and functional ingredients, including the antioxidant Ergothioneine (ErgoActive®). The company offers a wide range of ingredients for healthy aging and various industries.

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California Natural Color

Fresno, CA

Based in Fresno, CA, California Natural Color manufactures naturally sourced ingredients, including high-quality grape seed extract, for the food, beverage, and nutraceutical industries. They also provide liquid and crystal colors made from fruits, vegetables, and other plant-based sources, supporting clean label product development.

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Canyonside Labs

Twin Falls, ID

Canyonside Labs, based in Twin Falls, ID, specializes in contract manufacturing for dietary supplements. They offer custom formulation, private label, and manufacturing services for capsule, liquid, and powder supplements, serving brands globally.

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Colortech Inc.

Morristown, TN

Based in Morristown, TN, Colortech Inc. manufactures a comprehensive range of color and additive masterbatches for the plastics industry. They specialize in formulations that include antioxidants, protecting polymers from oxidation and heat degradation, enhancing product performance and longevity.

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Conagen, Inc.

Conagen, Inc. develops and manufactures natural ingredients using synthetic biology and specialized fermentation. They produce high-quality products, including the antioxidant hydroxytyrosol, for the food and beverage, nutrition, and pharmaceutical markets at commercial scales.

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Connoils By Kraft

Waukesha, WI

Connoils By Kraft manufactures, distributes, and supplies bulk oil ingredients and powders, including Saw Palmetto, CBD, MCT, Hemp Seed, and Coconut. The company creates customized formulations for food, nutritional, and drink grade products, serving the pet nutrition, functional food, health, beauty, and sports nutrition industries.

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Cyanotech Corporation

Kailua-Kona, HI

Cyanotech Corporation cultivates Hawaiian microalgae, including Astaxanthin (BioAstin), for high-value health and nutrition products. Operating a 90-acre farm in Kailua-Kona, Hawaii, the company specializes in manufacturing potent antioxidant ingredients. They are committed to sustainable and environmentally sensitive production.

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Desert King

Chula Vista, CA

Based in Chula Vista, CA, Desert King manufactures high-purity botanical extracts from Quillaja saponaria and Yucca schidigera. Produced in state-of-the-art facilities, these saponin-rich extracts serve pharmaceuticals, food & beverage, personal care, and animal health, valued for their antioxidant properties.

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Dover Chemical Corporation

Hammond, IN

Based in New York, NY, Dover Chemical Corporation manufactures liquid and solid antioxidants, including organophosphites. The company also produces polymer additives, flame retardants, and specialty chemicals. With ISO9001:2015 certified manufacturing facilities in Dover, OH, and Hammond, IN, they serve various industrial markets.

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Elis Manufacturing & Packaging Solutions

Kaufman, TX

Elis Manufacturing & Packaging Solutions, based in Kaufman, TX, offers end-to-end contract manufacturing for nutraceuticals and consumables. They specialize in tailored blending, encapsulation, custom formulations, and comprehensive filling and packaging services. The company manages the entire product journey from ingredient sourcing to fulfillment.

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Ethical Naturals, Inc.

Novato, CA

Based in Novato, CA, Ethical Naturals, Inc. manufactures specialty botanical extracts and ingredients for private label. Operating from an NSF-Certified cGMP facility, the company supplies high-grade ingredients globally, including antioxidant compounds like Polyphenol-C and ResveraTrue® resveratrol, along with L-Theanine and Glucosamine.

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FAR Chemical

Palm Bay, FL

FAR Chemical is a custom and toll manufacturer specializing in complex specialty chemicals, fine organics, and intermediates. They offer comprehensive process development, engineering, and scale-up, producing chemical compounds from gram to multiple ton quantities. Serving diverse industries including pharmaceuticals, personal care, flavors, and polymers, FAR Chemical provides custom chemical synthesis.

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Fenchem US

Mount Laurel, NJ

Based in Mount Laurel, NJ, Fenchem US specializes in ingredient technology, developing and supplying antioxidant solutions like TOCOVET® D-alpha Tocopheryl Acetate and Mixed Tocopherols. They offer custom-made production for human nutrition, animal feed, food & beverage, and personal care markets.

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FoodSafe Technologies

Deer Park, NY

FoodSafe Technologies offers innovative antioxidant solutions designed to enhance the shelf life and nutritional stability of protein-based foods. The company specializes in developing advanced technologies to preserve food quality and safety for the food industry.

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Freedom To Formulate

Sisters, OR

Freedom To Formulate is a Sisters, OR-based custom health supplement manufacturer, operating an NSF GMP certified facility. They create bespoke nutritional supplements and personalized compounded nutrients. Products target anti-aging, cardiovascular, and metabolic health, often incorporating ingredients with antioxidant properties into their formulations.

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Gemini Pharmaceuticals

Gemini Pharmaceuticals manufactures dietary supplements and nutraceuticals in the USA. The company provides comprehensive turnkey manufacturing and packaging services for various health and wellness products. They focus on delivering complete solutions to clients in the nutrition and pharmaceutical sectors.

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GenVid Lab

Miami, FL

Based in Miami, FL, GenVid Lab offers comprehensive contract manufacturing and packaging solutions for nutraceuticals. They specialize in custom formulation and production of supplements in various forms, including capsules, tablets, powders, and liquids. GenVid Lab partners with brands to manufacture high-quality products, including those featuring antioxidants.

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Health Genesis

Anaheim, CA

Based in Anaheim, CA, Health Genesis operates an FDA-registered, GMP-compliant manufacturing facility. They provide manufacturing services for health-related products, ensuring rigorous testing at multiple stages. The company offers low minimum order requirements for its clients.

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HP Ingredients

Bradenton, FL

Based in Bradenton, FL, HP Ingredients supplies science-backed raw materials and offers private label manufacturing for dietary supplements. Specializing in ingredients like antioxidant-rich MaquiBerry, they enable businesses to create custom, clean-label products addressing diverse health issues.

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Kensing

Kankakee, IL

Kensing, based in Kankakee, IL, is a manufacturer specializing in high-purity plant-based vitamin E. The company produces vitamin E products with at least 96% purity, serving various industrial and commercial sectors that require quality antioxidant ingredients.

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King Industries, Inc.

Norwalk, CT

Based in Norwalk, CT, King Industries, Inc. develops and manufactures specialty chemical additives. Since 1932, the company has focused on creating solutions that enhance the performance of diverse materials and chemical formulations. They offer comprehensive technical support for their manufactured products.

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Kurita America Inc.

Minneapolis, MN

Based in Minneapolis, MN, Kurita America Inc. provides industrial water treatment solutions, including the OxiOUT 1000 product. This certified antioxidant increases the shelf life of wet cakes by combating mold. The company specializes in integrating technologies and engineering to solve complex industrial water management challenges.

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Layn Natural Ingredients

Newport Beach, CA

Based in Newport Beach, CA, Layn Natural Ingredients manufactures innovative water-soluble polyphenol feed additives. These specialized ingredients are designed to enhance poultry and swine nutrition, acting as powerful natural antioxidants. The company provides essential solutions for commercial agricultural customers focused on animal health and performance.

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Botanic Healthcare

Lebanon, NJ

Based in Lebanon, NJ, Botanic Healthcare (operating as LipsoBio®) specializes in manufacturing liposomal antioxidant molecules and advanced nutrient delivery systems. Their LipsoBio® technology enhances the absorption, bioavailability, and stability of essential compounds for healthcare and nutrition applications.

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Makers Nutrition

Hauppauge, NY

Based in Hauppauge, NY, Makers Nutrition is a contract supplement manufacturer. They specialize in formulating and producing various dietary supplements, including vitamins, immune support formulas, custom gummies, liquids, and superfoods. They provide private label manufacturing services for businesses in the supplement industry.

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Matsun Nutrition

Matsun Nutrition is a US-based contract and private label manufacturer specializing in liquid vitamins and supplements. They handle manufacturing for clients, offering custom formulations including organic and non-GMO options, with low minimums to launch new brands.

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NAI

Carlsbad, CA

NAI is a contract manufacturer specializing in custom nutritional supplements. With manufacturing facilities in Carlsbad and Vista, California, they offer comprehensive formulation, production, and packaging services. NAI produces a diverse range of dietary supplements for B2B clients, including innovative antioxidant-based products for the health and wellness industry.

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NP Nutra

NP Nutra specializes in providing premium nutraceutical ingredients and raw materials, including superfruits, adaptogens, and organic vegetable blends. They offer high-quality solutions like CocoK6™ and Veggie Fusion™ Blend for use in beverages, supplements, and functional foods.

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NutriScience

Milford, CT

Based in Milford, CT, NutriScience specializes in developing innovative proprietary ingredients backed by scientific research. With over 25 years of industry and technical knowledge, the company provides advanced solutions for the nutritional and health sectors, focusing on ingredient development.

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BASF

Florham Park, NJ

Based in Florham Park, NJ, BASF's nutrition division manufactures high-quality feed ingredients for animal nutrition. Their portfolio includes essential vitamins, carotenoids, and enzymes, many serving as antioxidants. BASF provides critical solutions to the animal feed industry, supporting sustainable global food production.

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Napa Valley Bioscience

Santa Monica, CA

Napa Valley Bioscience, based in Santa Monica, CA, is an American, research-driven nutraceutical company. They specialize in researching, developing, and manufacturing novel nutraceutical products for others. Their innovative formulations include antioxidant compounds, highlighted by their trademarked Antioxidine®, aimed at maintaining a healthy life.

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Organic Filling Solutions, Llc

Los Angeles, CA

Based in Los Angeles, CA, Organic Filling Solutions, Llc provides comprehensive contract manufacturing, filling, and formulating services. Specializing in skincare, haircare, cosmetics, and bath products, they offer private label, custom formulations, and turnkey solutions. The company assists businesses in developing and producing their brands from concept to finished goods.

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Performance Additives

Johnson City, TN

Performance Additives, based in Johnson City, TN, provides high-quality plastic additives for various industrial applications. Leveraging industry expertise and global technology, the company ensures reliable supply chains. They specialize in solutions designed to enhance material performance and longevity for plastic manufacturers.

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PURE Private Label LLC

Alpharetta, GA

Based in Alpharetta, GA, PURE Private Label LLC provides private label manufacturing services for dietary supplements, skincare, and pet products. The company specializes in sports nutrition, health and wellness, pre-workout, and fat burner formulations, operating under a unique GMP program to support brand creation.

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Rangen Group

Rangen Group provides innovative nutritional products and antioxidant solutions for the animal feed industry. Serving aquaculture, livestock, petfood, and rendering sectors, they offer tailored solutions to protect freshness and nutritional value. The company also offers specialized material handling, premixing, and bottling services.

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Sacramento Ag Products, LLC

Sacramento, CA

Sacramento Ag Products, LLC, a joint venture, manufactures specialty chemicals for the West Coast. Based in Sacramento, CA, the company produces strong oxygen scavengers and reducing agents, such as Ammonium Bisulfite and Magnesium Bisulfite. These products, serving agriculture and industrial markets, function as industrial antioxidants to prevent oxidation.

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Sirio Americas Best Formulations

City Of Industry, CA

Based in City of Industry, CA, Sirio Americas Best Formulations is a contract manufacturer and private labeler of high-quality nutritional supplements. They offer comprehensive manufacturing and research and development services for a wide range of dosage forms, including softgels, gummies, capsules, tablets, and powders.

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Superior Supplement Manufacturing

Fountain Valley, CA

Superior Supplement Manufacturing, a Fountain Valley, CA-based contract manufacturer, provides turnkey dietary supplement production. They offer R&D, formulation, and packaging services, specializing in antioxidant products. Capabilities include capsules, tablets, powders, gummies, liquids, and softgels, tailored to specific market and consumer targets.

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Trilogy Flavors

Trilogy Flavors, based in Abingdon, MD, manufactures natural antioxidants for food and beverage products. These help boost shelf life, preserve flavor, and support clean label requirements. The company also develops custom flavor formulations and ingredients, specializing in citrus, spice, mint, essential oils, and oleo-resins.

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Vibrant Ingredients

Lake Mary, FL

Vibrant Ingredients is a natural ingredient partner for food and beverage manufacturers, offering a vast portfolio of clean label ingredients. Based in Lake Mary, FL, the company provides solutions for flavor, function, and protection, including antioxidants. Their USA-made ingredients are rooted in nature, backed by science, and designed for purity and performance.

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Vital Nutrients

Middletown, CT

Vital Nutrients manufactures science-backed nutritional supplements formulated with antioxidant vitamins, minerals, and flavonoid-rich botanicals. These products are designed to protect against oxidative damage caused by free radicals. They offer a diverse range of clean, effective supplements for healthcare practitioners and direct consumers.

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Vitaquest

West Caldwell, NJ

Based in West Caldwell, NJ, Vitaquest is a dietary supplement manufacturer with over 45 years of experience. The company offers custom USA manufacturing services for capsules, powders, and tablets, producing over 4,000 custom formulas for nutraceuticals and health-promoting functional foods for various brands.

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Wiley Companies

New Albany, OH

Based in New Albany, OH, Wiley Companies provides responsive custom manufacturing services. They specialize in high purity specialty chemicals and custom ingredient manufacturing for food and dietary supplements. Serving CPG and chemical industries, the company is certified FSSC22000 and ISO 9001, ensuring reliable production.

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Bextral

Bextral provides feed additive solutions for the livestock industry, improving animal health and performance. Specializing in feed preservation, the company offers products for pathogen management, gut health, and digestive efficiency across poultry, swine, aqua, and ruminant sectors.

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Phoenix Plastics

Placentia, CA

Based in Placentia, CA, Phoenix Plastics manufactures high-value plastic additives, including stabilizers, process aids, and chemical foaming agents. They offer compounding services for injection molding, extrusion, blow molding, and film & sheet applications, protecting polymers from harsh conditions for industrial manufacturers.

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Pravada Private Label

Fort Myers, FL

Based in Fort Myers, FL, Pravada Private Label manufactures private label clean beauty skin and hair care products. They offer over 300 stock formulations, including anti-aging lines rich in antioxidants, or custom formulations. Pravada provides comprehensive end-to-end production for brands, supporting small to large-scale runs.

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Trilogy Laboratories, LLC

Fort Myers, FL

Based in Fort Myers, FL, Trilogy Laboratories, LLC is a private label skincare manufacturer in the USA. They specialize in custom manufacturing a diverse range of cosmetic products including serums, moisturizers, and eye care, often formulating with key ingredients like antioxidants for clients such as estheticians and dermatologists.

Email available

ABCO Laboratories, Inc.

Fairfield, CA

Based in Fairfield, CA, ABCO Laboratories, Inc. offers contract manufacturing for food and dietary supplement industries. Services include product development, raw material sourcing, manufacturing, testing, and packaging. They are certified for Organic, Non-GMO Verified, Kosher, and Halal production, ensuring high-quality custom and private label products.

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Avient

Avon Lake, OH

Headquartered in Avon Lake, OH, Avient is a global provider of specialized and sustainable material solutions, offering a comprehensive line of polymer additives. The company manufactures and supplies a broad portfolio of these additives, including various antioxidants, UV stabilizers, processing aids, and colorants, for diverse polymer applications.

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Barentz-NA (Vitablend)

Barentz-NA (Vitablend) is a specialty ingredients solution provider operating across North America. The company excels in formulating and delivering customized antioxidant systems, integrating science, experience, and innovation. They also offer technical laboratory solutions to support ingredient development and application.

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Cargill

Minneapolis, MN

Cargill manufactures Proviox™, a specific blend of natural antioxidants designed to support optimal animal performance throughout their lifecycle. These specialized blends are particularly effective under stressful conditions, contributing to animal health and productivity. Based in Minneapolis, MN, Cargill offers innovative ingredient solutions for commercial agriculture.

Phone available

Catalyst Nutraceuticals

Buford, GA

Based in Buford, GA, Catalyst Nutraceuticals specializes in custom manufacturing and formulation of nutraceuticals and dietary supplements. They provide services for performance nutrition and wellness brands, offering various forms including powders, stick packs, and capsules, along with reliable sourcing and packaging.

Phone available

Eastman

Kingsport, TN

Based in Kingsport, TN, Eastman manufactures a variety of antioxidants for industries including personal care, agriculture, and textiles. Their antioxidants inhibit rancidity in creams and lotions, and prevent fragrance degradation. The company also focuses on advancing sustainable solutions for a better world.

Phone available

GMP Laboratories of America, Inc.

Anaheim, CA

Based in Anaheim, CA, GMP Laboratories of America, Inc. is a custom contract manufacturer specializing in quality dietary supplements and homeopathic drug products. They offer manufacturing and packaging for hard-shell capsules, tablets, powders, and liquid formulations. The company is NSF GMP for Sport and USDA Organic certified.

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W. R. Grace

W. R. Grace is a global manufacturer specializing in high-performance and specialty chemicals. With decades of experience in organic chemical synthesis, the company produces fine chemicals and custom active ingredients. Grace provides science-based solutions, serving various industries with its advanced chemical production capabilities.

Phone available

Ingredients By Nature

San Bernardino, CA

Based in San Bernardino, CA, Ingredients By Nature is a US-based manufacturer and supplier of over 300 science-backed nutraceutical ingredients. The company offers custom ingredient manufacturing and full-service contract manufacturing from cGMP-compliant facilities, specializing in categories such as antioxidants, blood sugar support, and cardiovascular health.

Phone available

Mayzo, Inc.

Suwanee, GA

Mayzo, Inc. provides chemical additive solutions, specializing in antioxidants and UV absorbers that stabilize products against damage from heat, light, or oxygen. They offer custom additive blends, proprietary formulations, and various product forms like powders, liquids, granulation, and pelletization for diverse customer applications.

Phone available

Milliken

Spartanburg, SC

Milliken is a global manufacturing leader in materials science, providing a portfolio of over 11,000 innovations. The company offers specialty chemistries, colorants, and additives for coatings and plastics, among other solutions. They develop products for various industries, including performance-enhancing clarifiers and advanced textile solutions.

Phone available

SI Group

The Woodlands, TX

Based in The Woodlands, TX, SI Group is a global manufacturer of innovative performance additives, process solutions, and chemical intermediates. They provide essential additive solutions for plastics, rubber, fuels, and lubricants, enhancing the quality, performance, and durability of various industrial and consumer items.

Phone available

Antares Health Products, Inc.

Saint Charles, IL

Based in Saint Charles, IL, Antares Health Products, Inc. manufactures and supplies pharmaceutical and food-grade Vitamin E TPGS (tocophersolan). This antioxidant ingredient enhances absorption and acts as an emulsifier for poorly-soluble compounds. Their products serve industries like pharmaceuticals, dietary supplements, food, beverages, and personal care.

Phone available

Vanderbilt Chemicals, LLC

Norwalk, CT

Based in Norwalk, CT, Vanderbilt Chemicals, LLC manufactures a broad range of industrial chemicals and mineral products. The company provides essential additives tailored for the lubrication needs of various compressor types, including reciprocating, rotary, and turbo, serving a wide array of applications globally.

Phone available

VitaWest Nutraceuticals

La Verne, CA

VitaWest Nutraceuticals, located in La Verne, CA, provides private label supplement manufacturing services. Utilizing their Los Angeles facility, they offer over 500 stock formulas and bulk ingredients for growing brands, specializing in low MOQs and fast turnaround. They produce various formats including gummies, capsules, powders, and tinctures.

Phone available

Kalsec Inc.

Kalsec Inc. manufactures natural food and beverage ingredients, specializing in taste, color, and food protection solutions. The company provides natural food protection solutions developed by its scientists to improve the shelf life and safety of various products. Kalsec also offers resources for replacing synthetic antioxidants like BHA and BHT.

No contact on file

Kemin

Kemin is a biotechnology company manufacturing specialty ingredients, including plant-derived extracts like rosemary and green tea, that provide antioxidant properties. These antioxidants help preserve food freshness and support human health. Serving global markets such as food and human health, Kemin operates numerous manufacturing facilities worldwide.

No contact on file

Vantage Specialty Chemicals

Chicago, IL

Vantage Specialty Chemicals is a global supplier of naturally derived specialty ingredients and formulations. The company provides solutions for various industries including personal care, beauty, food, and pharmaceuticals. They aim to improve product quality and process efficiency for industrial clients.

No contact on file

Voyant Beauty

Los Angeles, CA

Voyant Beauty specializes in the manufacturing of professional hair care, skin care treatments, and bath and body innovations. Their Los Angeles facility offers comprehensive product expertise for various cosmetic and personal care categories, often incorporating antioxidant ingredients into their formulations.

No contact on file

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How to Choose a Company

  • Verify their in-house analytical capabilities to conduct shelf-life stability studies specific to your product matrix, such as Rancimat testing for fats/oils or accelerated aging tests, rather than solely relying on raw material ORAC values.
  • For dietary supplements or pharmaceutical excipients, insist on cGMP (current Good Manufacturing Practices) compliance and consider suppliers holding NSF International or USP verification, while food-grade applications should demand FSSC 22000 or ISO 22000 certifications.
  • A critical red flag is a supplier unable or unwilling to provide comprehensive Certificates of Analysis (CoAs) that include details on heavy metals, pesticide residues, and microbial load for their natural botanical extracts, indicating a potential lack of raw material traceability and quality control.
  • Prioritize manufacturers who offer application-specific technical support and can demonstrate proven efficacy of their antioxidant within your target formulation (e.g., high-fat bakery, acidic beverage, oil-in-water emulsion) to ensure stability and prevent off-notes or discoloration during processing and storage.

Frequently Asked Questions

How can I accurately assess the long-term efficacy of an antioxidant ingredient in my specific product formulation?

Relying solely on in-vitro tests like ORAC or DPPH can be misleading. The most reliable assessment comes from real-time and accelerated shelf-life stability studies conducted within your final product matrix. Look for suppliers capable of providing or assisting with application-specific testing such as Rancimat for lipid oxidation, sensory evaluations for off-notes, and color stability tests over the full projected shelf life under relevant storage conditions.

What are the key trade-offs between synthetic and natural antioxidants for food and beverage applications?

Synthetic antioxidants (e.g., BHA, BHT) often offer superior potency and cost-effectiveness for preventing lipid oxidation, but face consumer pushback due to "clean label" demands. Natural antioxidants (e.g., tocopherols, rosemary extract, ascorbyl palmitate) are preferred for clean label, but can be less potent, more costly, and may introduce sensory challenges like flavor notes or color changes, requiring careful formulation and potentially higher usage rates to achieve desired oxidative stability.

Beyond general food safety, what specific regulatory or industry standards are crucial for sourcing nutraceutical-grade antioxidants?

For nutraceuticals, ensuring GRAS (Generally Recognized As Safe) status for food ingredients is fundamental in the US. Beyond that, look for cGMP (current Good Manufacturing Practices) compliance, third-party certifications like NSF International or USP Verified for supplement ingredients, and Non-GMO Project Verified or USDA Organic status if those claims are relevant to your product positioning. Also, understand ingredient specific monographs and purity standards.

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