I spent twelve years at Allergan, a company whose standards for scientific claims were set by pharmaceutical regulators rather than marketing departments. I spent another twelve years at Natura, one of the world's largest cosmetics companies, watching how the industry communicates what its products do, and what it carefully avoids saying. The gap between those two experiences is what this section is about.
The articles here are not consumer guides. They are scientific arguments, written to be understood without a laboratory background, about what actually happens when a product contacts the hair — what the mechanism is, what the evidence shows, and what the vocabulary the industry uses is designed to prevent you from asking. The standard applied throughout is the same one I learned in a pharmaceutical context: a claim is either mechanistically grounded or it is not. There is no middle ground.
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