Baking soda makes Julia Roberts` teeth shine!

Los Angeles: Julia Roberts is famous for her bright smile and the actress says she owes it to her grandfather`s tip of using baking soda.

"I brush [my teeth] with baking soda. [My grandfather] would put a big heaping mound of it on his toothbrush. He had only one cavity in his entire life," Roberts said. The 44-year-old actress said at times she is so busy as a mother that she barely has time to take care of her teeth, reported InStyle magazine. "Sometimes that`s all I do as far as a regimen goes. Look, I`m happy if I have on moisturizer and ChapStick! When you`re dressing three people besides yourself, something has to fall away. I`ve learned to always have a big pair of dark sunglasses within arm`s reach before going out," she said. When she does have time to primp, Roberts relies on a tip from the late makeup artist Kevyn Aucoin. "`Mascara, mascara, mascara!` It just makes you look like you`ve had a good nap." Would she ever rely on Botox or plastic surgery for the same effect? Probably not. "I`m pro whatever works for you. "For me, at this point, I`m clinging to my good genes and lots of hugs and kisses from my husband." PTI