I don't think that is true, people will compare her to themselves and their friends and estimate an age from there. I think she looks older than me more wrinkles, more sun damage, volume loss and I am mid 40's so I put late 40's.
If she us younger then a good skincare routine, healthy diet and exercise will help her a lot. Not to mention a better photograph, she posted this one though rather masochistically, where she looks middle aged regardless of her actual age.