Kitchen Chemists explores how Black women, faced with systemic medical neglect, transformed domestic and digital spaces into laboratories for scientific discovery. I argue the twenty-first-century natural hair movement was primarily a health social movement where Black women mobilized as “citizen scientists” to challenge the toxicity of textured-hair formulations. This activism continues a lineage of early twentieth-century innovators like Annie Malone and Madam C.J. Walker, who produced everyday dermatological research and remedies as institutional medicine ignored the reproductive health risks of mainstream beauty products. Integrating archival, oral, and digital history, this project intervenes at the intersection of the history of medicine, environmental justice, and Black intellectual labor. By centering the “kitchen” and the “blog” as sites of knowledge production, Kitchen Chemists provides a vital historical foundation for current policy—from the CROWN Act to FDA chemical bans—framing Black women’s haircare as a century-long struggle for environmental justice and medical autonomy.