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8 manufacturers

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  1. Assemblers Inc

    USDA Organic

    Chicago, IL, United Statesassemblers.com

    • Gummies
    NSF/ANSI 455-2checked Nov 1, 2026

  2. J. R. Carlson Laboratories, Inc.

    Lincolnshire, IL, United Statescarlsonlabs.com

    • Capsules
    • Gummies
    • Liquids
    • Oils
    • Powders
    • Softgels
    • +1 more
    Operations:
    • Liquid formulation
    NSF/ANSI 455-2checked Nov 1, 2026

  3. Nestlé Healthcare Nutrition, Inc. DBA Vital Proteins

    Franklin Park, IL, United Statesvitalproteins.com

    • Capsules
    • Powders
    • Tablets
    Operations:
    • Coating
    • Tablet compression
    • Encapsulation
    • Dry formulation
    NSF/ANSI 455-2checked Nov 1, 2026

  4. Nutrivo LLC

    Aurora, IL, United Statesnutrivo.com

    • Powders
    Operations:
    • Dry formulation
    NSF/ANSI 455-2checked Nov 1, 2026

  5. Prinova Group, LLC

    Hanover Park, IL, United Statesprinovausa.com

    • Capsules
    • Liquids
    • Powders
    Operations:
    • Liquid formulation
    • Encapsulation
    • Dry formulation
    NSF/ANSI 455-2checked Nov 1, 2026

  6. Proven Partners Group, LLC

    Elgin, IL, United Statesprovenpartnersgroup.com

    • Powders
    Operations:
    • Dry formulation
    NSF/ANSI 455-2checked Nov 1, 2026

  7. Thermo-Pak Co. Inc.

    Wood Dale, IL, United Statesthermo-pak.com

    • Capsules
    • Softgels
    • Tablets
    NSF/ANSI 455-2checked Nov 1, 2026

  8. Glanbia Performance Nutrition (Manufacturing), Inc.

    Makes its own brands; contract work not confirmed

    Downers Grove, IL, United Statesglanbia.com

    • Capsules
    • Powders
    • Tablets
    Operations:
    • Coating
    • Tablet compression
    • Encapsulation
    • Dry formulation
    NSF/ANSI 455-2checked Nov 1, 2026