And that doesn't just stop with working out, eating healthily and wearing trendy clothes.
Apparently unsatisfied with the colour of her teeth, Kendall met with a cosmetic dentist in Beverly Hills, California on Wednesday.
Smile! Kendall had her teeth whitened on Wednesday, and it certainly looks like she was pleased with the results
She was also spotted on Wednesday filling up her black Range Rover at a gas station in Woodland Hills, California.
Kendall looked sharp in a pair of skin-tight blue jeans, a trendy white tank top and a big pair of dark shades.
She wore her hair in a braid that fell neatly across one shoulder but kept her long bangs dangling free.
Let's go! The 17-year-old swipes at her bangs as she wraps up her stop at the gas pump
Going somewhere? Kendall hustles out of an office building on Wednesday
Dressed in a simple white T-shirt, some purple-trimmed yoga pants and a pair of flip flops, the young star went straight from the building into her car, which was waiting on the curb.
She shaded her eyes with another pair of sunglasses - this time in the classic wayfarer style - and had her phone in hand as she walked.
Thank you! A man holds open Kendall's door as she leaves the premises
She, alongside 16-year-old sister Kylie Jenner, are also promoting their new PacSun fashion collection just in time for the back-to-school season.
Of course for the girls themselves there will be no back to school - they have opted to complete the studies through home schooling in order to concentrate on their careers.
Ambitious: Kendall and Kylie (right), who have their own fashion line with PacSun, pose with mum Kris Jenner in this Twitter photo from August 22