Kristin Cavallari makes her own formula milk for her children.
The 29-year-old beauty - who has sons Camden, three, and Jaxon, 22 months, and daughter Saylor, three months, with husband Jay Cutler -
is very careful about her kids' diet and concocted a goat's milk-based drink for her boys once they had stopped breastfeeding as she felt it was the best thing for them.
She said: "Once I stopped breastfeeding each kid and we ran out of stock of my frozen breast milk, we put them on a homemade goat milk formula
"I'm not a fan of of soy (it's usually genetically modified; more about that later), and both Cam and Jax have sensitivities to cow's milk -- and unfortunately, soy and cow's milk are the only two options for store-bought formula available right now.
"Goat's milk is the closest thing out there to human breast milk. Plus, it is more easily digested than cow's or soy milk.
"Giving goat's milk to children is popular in Europe and other parts of the world. Goat's milk is not enough, though, so Jay and I, along with our pediatrician, came up with a formula recipe for our kids."
Kristen admitted she is a "a psycho about reading every single ingredient label and researching ingredients" but believes her insistence on a clean diet and only eating organic meat and fish has made her family healthier, and even helped her spouse better control his diabetes.
Writing in her new book 'Balancing in Heels', she explained: "His insulin use is down, and he's off his blood pressure medication. And he looks the best he ever has: His weight is ideal and his skin is clear.
"I really believe that my family's infrequency of getting sick is due to our diet."
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