United Kingdom, June 7 -- Kristin Cavallari's health-conscious lifestyle is the key to her youthful-looking skin.

The 38-year-old reality star has taken to social media to rubbish suggestions that she uses Botox, with Kristin citing her healthy lifestyle as the secret to her good looks.

Alongside a makeup-free selfie, Kristin said on Instagram: "OK guys you can see every line and pore in this picture. Zero makeup here except a little mascara.

"I've said 500 times that I don't do Botox and people still don't believe me but I think it's VERY obvious that I don't if you watch me talk on TV or in an interview. My face MOVES. a lot. And you can see the lines on my forehead here. (sic)"

Kristin subsequently revealed that she undergoes Plate...