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Certified ManufacturersFor manufacturers

Manufacturer directory

Supplement manufacturers with a manufacturing or packaging facility on a public registry we check.

754 manufacturers

  1. Glanbia Performance Nutrition UK Ltd

    Makes its own brands; contract work not confirmed

    United Kingdomoptimumnutrition.com

    • Bars
    • Powders
    Informed Manufacturer(not a GMP audit)checked Oct 6, 2026

  2. Science in Sport PLC

    Makes its own brands; contract work not confirmed

    United Kingdomscienceinsport.com

    • Bars
    • Powders
    Informed Manufacturer(not a GMP audit)checked Oct 6, 2026

  3. Athletic - Therapeutic - Pharma (ATP)

    Makes its own brands; contract work not confirmed

    Granby, QC, Canada

    Health Canada site licencechecked Oct 6, 2026

  4. Glanbia Performance Nutrition (Manufacturing), Inc.

    Makes its own brands; contract work not confirmed

    Downers Grove, IL, United States

    • Capsules
    • Powders
    • Tablets
    Operations:
    • Coating
    • Tablet compression
    • Encapsulation
    • Dry formulation
    NSF/ANSI 455-2checked Oct 6, 2026