A cosmetic factory was a place in which people would undergo heavy body alteration to remain youthful as they aged.

On the way to Hilldale, Foley had believed Jennifer Parker to have spent a bundle at a cosmetic factory as her appearance did not match her age. It also allowed Foley to start wondering about her story and how she ended up in a place like Hilldale, but knew that Reese would say it was just conjecture which had no place in police procedure.

Doc Brown similarly got an "all natural overhaul" from a rejuvenation clinic to add 30-40 years to his life sometime between his first trip to the future and when he decided to bring Marty to the future to "do something about his kids".

Appearances

• Back to the Future Part II novelization (Mentioned only)
• Back to the Future Part II