They say a family should support each other and be there for one another, and that seemed to be the motto for the Kardashian-Jenner clan, up until now. Kendall Jenner, who is just one-sixth of the clan, admitted that she hasn't even tried Kylie Skin, her younger sister Kylie Jenner's skincare line.

Kendall instead uses Proactive, a skincare line that has been on the market for over 20 years. The regimen, known for helping those with acne, boasts over 20 million customers worldwide and is the number one acne brand in America, according to its website.

While Kendall celebrated Proactiv's Paint Positivity campaign in New York, the supermodel revealed the news that she has yet to try Kylie Skin. "I'm stuck to my routine," the supermodel told Bustle. "I don't want to do too much."

Earlier this year, Kendall opened up about her struggles dealing with acne while living in the public eye. The five foot ten beauty, who was announced as Proactiv’s newest spokesperson on Jan. 6, told People, “I honestly had never really spoken about [my acne] before, but a lot of people had seen me struggling with it mostly through paparazzi photos or the Golden Globes. I had exhausted all other options, I was desperate, and I was like, ‘You know what? I’m gonna try [Proactiv].’ It was such an awesome experience for me and really helped me.”

The 23-year-old was first approached by the brand for a partnership after seeing her acne struggles in the media. According to Bustle, Kendall "was a self-admitted skeptic" and wanted to make sure the product worked before she committed to the brand partnership. Now, she has been using Proactiv for almost a year.

While Kendall may not use Kylie Skin products, she did speak to Bustle about her upcoming collaboration with Kylie Cosmetics. When asked to describe the partnership, Kendall simply said, "Natural beauty."

Kendall and Kylie Jenner
Kendall and Kylie Jenner are pictured attending NBCUniversal's Golden Globes After Party at The Beverly Hilton Hotel in Beverly Hills, California on Jan. 8, 2017. John Fredricks/Getty Images