Lydia E. Pinkham's Vegetable Compound ad 1882
The pattern
This still is filed under Borrowed medical authority.
Define
The claim wears a lab coat: a diagram, a percentage, a clinical tone that is not necessarily a clinician.
Mechanism
Authority costume. Science-looking form transfers trust. Use it only when the substance matches, or we are documenting a historical mechanism. We do not recommend the abuse.
Verdict
We have real evidence and the buyer needs it in a form they already trust: a chart, a protocol, a named standard.
Why it works
The portrait humanizes the brand. In an era of snake oil sold by men, a motherly female face offering sympathy and free advice was highly reassuring.
Steal this when
When the founder's identity and empathy are your strongest differentiating factors.