Brewster Nutrition

We celebrate the core principles of the natural foods industry through the development, production and marketing of innovative speciality ingredients. Designed for select niche markets, our ingredients are manufactured to the standards those markets demand: exceptional product quality and personalized customer service.

Our History

Innovation and quality since 1939

Brewster Food


  • 1939: Founded as Test Laboratories, Inc, began research, development, and alfalfa processing
  • 1950: Expanded to citrus bioflavonoids, concentrated citrus extracts, new freeze-drying technology
  • 1972: Became one of the first to make freeze-dried probiotic cultures


Currently producing over 300 niche products of unsurpassed quality, we maintain two plants in California. Strong alliances with key suppliers, industry consultants, and distributors continue to provide remarkable product development successes. Brewster Nutrition remains research-driven, working in strategic relationships with numerous entities in development of unique nutraceutical ingredient offerings.

Outstanding quality is synonymous with the company's core brand name, TESTLAB, an industry staple since 1950.

Our Services

  • Product Formulation Custom Product Formulations
  • Granulations & Premixes Granulations & Premixes
  • Freeze Drying Freeze Drying
  • Sterilization Sterilization
  • Research & Development Research & Development

Customer-specific formulations & solutions

As we offer a wide variety of services—from contract freeze-drying to a completely-controlled granulation process, from blending and milling to customer-specific formulations and irradiated product alternatives—we continue to conduct research for new and novel ingredient applications while supplying a diverse range of nutraceutical ingredients for food supplements, special dietary foods, natural food concentrate products, and pharmaceuticals.

Our Products

Natural ingredients

We provide a range of high-quality, customizable, natural speciality food ingredients for the manufacturing chemist.

Citrus Concentrates & Derivatives*

  • Citrus Bioflavonoids
  • Citrus Pectins
  • Citrus Dietary Fiber
  • Whole Citrus Powders
  • Customer Specific Citrus Formulations and Granulations
  • Citrus Extracts
  • Citrus Polymethoxylated Flavones (PMF)

Other Bioflavonoids

  • Rutin
  • Quercetin

Yucca Schidigera Formulations

  • Liquid
  • Powder
  • Freeze-Dried
  • Spray-Dried

Enzyme Formulations

  • Bromelain

Green Foods

  • Alfalfa Powder
  • Alfalfa Powder (Organic Certified)
  • Alfalfa Juice Concentrate
  • Barley Grass Powder (Organic Certified)
  • Barley Juice Concentrate (Organic Certified)
  • Wheat Grass Powder (Organic Certified)
  • Wheat Grass Juice Powder (Organic Certified)
  • Oat Grass Powder
  • Oat Grass Juice Powder

Freeze-Dry Formulations**

  • Probiotic Cultures
  • Yucca Schidigera Extracts

Bone Meal, Egg Shell & Oyster Shell Powders

Fruit and Vegetable Concentrates

Herb and Botanical Powders & Extracts

Custom Formulations & Granulations

Products Under Development

  • Citrus Limonoids
  • Citrus Bioflavonoids and Extracts (Water Soluble)
  • Lipid Extractions
  • Organic Citrus Blends
  • Fruit Concentrates (Freeze-Dried)