PLG is pleased to welcome Angela Diesch as a partner in our Litigation and Regulatory Groups in San Francisco, California.
She counsels companies in the cosmetics, over-the-counter drug, and medical device industries on all aspects of regulatory compliance, product development, labelling, and marketing. Angela is particularly recognized for her expertise in the “natural” and “organic” sectors, helping clients responsibly launch innovative products that comply with FDA, FTC, and other federal and state regulations.
Angela supports clients throughout the entire product lifecycle, from classification and formulation to labelling, claims substantiation, and quality systems. She frequently drafts and negotiates research and development, manufacturing, supply, and quality agreements, and assists clients in building effective SOPs and compliance programs under current Good Manufacturing Practice (cGMP) standards. She also assists clients with tracking and complying with states’ Extended Producer Responsibility rules and reporting.
As both a seasoned litigator and regulatory advisor, Angela represents companies in investigations and enforcement actions brought by the FDA, FTC, NAD, USDA NOP, state attorneys general and district attorneys, as well as private litigants. Angela’s practical, strategic guidance, grounded in her deep knowledge of the personal care industry, makes her an invaluable partner to clients, whether defending them in private litigation and class actions or responding to 483 observations, Warning Letters, and civil investigative demands.
As a recognized leader deeply committed to advancing the personal care industry, Angela plays a pivotal role in shaping industry standards through her leadership through NSF International. She chairs NSF’s Joint Committees on Organic Personal Care (NSF/ANSI 305), Good Manufacturing Practices for Cosmetics (NSF/ANSI 455-3) and OTC Drugs (NSF/ANSI 455-4), as well as NSF Guideline 527, Contents and Claims Certified for Cosmetics, and the new Joint Committee on Homeopathic Drugs. Through this work, Angela has been instrumental in helping to develop key auditing and certification standards that promote product integrity, consumer trust, and regulatory compliance. She is also the founding author of CosmeticsAndTheLaw.com and a frequent speaker at national industry conferences and client training programs.
Prior to joining PLG, Angela was a partner at Amin Wasserman Gurnani, LLP. She earned her J.D. from University of the Pacific, McGeorge School of Law and her B.A. from the University of California, Davis.

