Prop 65 Notices

Prop 65 notice 2025-04957: CytoSport, Inc.

Chrissy Lester filed this California Prop 65 60-day notice on December 11, 2025. It names CytoSport, Inc. and alleges exposure to Lead from Muscle Milk Pro Series Gainer, Muscle Milk Pro Advanced Nutrition Shake.

The violations below are alleged in a 60-day notice. They are not proven. A 60-day notice is not a lawsuit and not a finding of liability.

AG number
2025-04957
Date filed
Noticing party
Plaintiff attorney
Trevor Flynn
Alleged violators
Chemicals
Source or product
Muscle Milk Pro Series Gainer, Muscle Milk Pro Advanced Nutrition Shake
Official notice
Notice PDF at oag.ca.gov
Official record
Attorney General record for 2025-04957
Last checked
November 11, 2026

What happened after this notice

Outcomes for this notice have not been checked yet. A settlement is not an admission and not a finding that anyone broke the law.

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Other notices naming CytoSport, Inc.

  • Pepsico, Inc. and 2 more: Lead in Evolve Plant Based Protein Powder Creamy Vanilla
    Notice 2025-04663, filed 2025-11-14 by Precila Balabbo
  • Muscle Milk and 2 more: Lead in Muscle Milk 100% Whey Protein Powder Chocolate
    Notice 2025-02583, filed 2025-07-21 by WHEN Justice
  • Evolve and 2 more: Lead in Evolve Plant Based Protein Powder Double Chocolate
    Notice 2025-02581, filed 2025-07-21 by WHEN Justice