07/10/2026
We mix iodine teat dip in Vaseline and apply daily to heal cuts and rain rot on our horses and selves.
Robert Chesebrough made his first fortune in kerosene. Then the Pennsylvania oil rush arrived, and suddenly nobody needed kerosene from a chemist in Brooklyn anymore.
So in 1859, he traveled to the Titusville oil fields to see what the fuss was about.
The drillers there showed him the problem: a thick, waxy residue that kept clogging their pump rods. They called it rod wax. It was useless.
Chesebrough watched a driller press a lump of it onto a fresh cut, offhand, like habit. He looked closer. Cuts and burns among the workers seemed to heal with unexpected speed. He filled several jars and carried them back to Brooklyn.
He spent years in his kitchen refining the substance. He deliberately cut and burned his own skin, applied the rod wax, and waited. He recorded the results. He refined the formula dozens of times until he had something colorless, odorless, and stable.
He called it Vaseline. He started selling it from a horse-drawn cart in New York City.
The pitch was direct: he would open wounds on his own hands in front of a crowd, apply the product, and move on. People bought it. By the 1880s, by one account, Chesebrough Manufacturing was shipping a jar of Vaseline every minute.
Then came the part the story is remembered for.
Chesebrough told interviewers that he ate a spoonful of Vaseline every single day. He said it was the reason for his health. He said this for decades.
At around 50, he fell seriously ill. According to the story he later gave, he had himself rubbed from head to foot with Vaseline. He recovered. Whether that sequence of events caused the recovery, or simply accompanied it, he did not doubt the connection.
He lived to 96.
No doctor has credited the Vaseline. Petroleum jelly is chemically inert by design; the body neither absorbs nor metabolizes it. But Chesebrough reached 96 in an era when most industrial-era men did not, and he went to his grave convinced his product had kept him there.
The Chesebrough Manufacturing Company eventually became part of Unilever. Vaseline is still produced today, in a formulation that has changed very little from what Chesebrough worked out on his kitchen table in Brooklyn.
He never stopped believing in it.
