She added to Mirror Celeb: "It worries me so much. I saw two girls, who can't have been older than nine, in gym wear running in the park the other day, and they were talking in detail about calories. It scares me so much, I don't want Willow to need to worry about it."
Meanwhile, Wyatt previously revealed her "horrendous" acne almost cost her a place in the Pussycat Dolls.
She said: "The pressure to look good intensified when I moved to L.A and I got horrendous cystic acne. It was the start of the Pussycat Dolls - it crushed my confidence and nearly cost me a place in the band."
And it wasn't just her pop star days that were tough for Wyatt.
She added: "I was picked on when I was younger for having a flat chest - the kids would rub a wall and go, 'Oh, Kimberly!' I was never the pretty girl.
"I had weight problems when I worked on cruise ships. When my costumes didn't fit during the quick changes, I had to be weighed every week."