Not all of the 39-year-old supermodel`s four kids, Leni, eight, Henry, seven, Johan, six, and Lou, three, like the healthy smoothies she makes, so she has to bribe them to get them finish them.
She said: "I`ve never really done a real diet. My New Year`s resolution for 2013 was to start every day with a fresh juice. We make an effort every morning - we peel pineapples, apples, lemons, bananas, kiwis, ginger and berries and we make delicious smoothies. Some of my kids don`t love it so I decided I would pay them a dollar if they finish their drink. All of the money goes into their piggy banks, they have collected a bunch of money since January 1. What`s good for them is good for me as well."
Despite her healthy habits, Heidi is happy to indulge in some junk food when her appetite demands it.
The blonde beauty - whose ex-husband is Seal - realises it`s important to allow yourself and the children a treat otherwise your menu gets boring.
In an interview with the US issue of OK! magazine, she said: "I love a good hamburger and French fries with mayonnaise and ketchup. That`s definitely one of my splurges. And chocolate with hazelnuts."