"I went straight to Weight Watchers and that was mainly to educate myself on how to cook properly, how to portion control," she said.
"(Ethan) was young when we started and I didn't make a big deal about it because I didn’t want him to think he was fat, but he knew himself - he had a mirror," explained Van Dyken.
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Mrs Van Dyken, who weighed 147kg at the start of her journey has lost almost half of her body weight, now weighing in at 74kg.
Rod has lost a total of 35kg since 2013, dropping from 120kg to 85kg.
Ethan has also lost more than 10kg and now as a teenager weighs less than he did at age 10. He also finished third in his cross-country race this year.
"Changing habits was what we needed to do to lose weight and become successful at it, but I definitely didn’t deprive us of anything," Van Dyken said. "I could never go back to eating the way I was before, I think it would really make me sick."
"We quite enjoy the way we eat now, I think this is what life’s supposed to be like."
"Instead of having ice cream after dinner we have a fruit salad. Ethan's happy with it, Rod's happy with it and we saw the results," she said.
This article was originally published on WomensHealth.com.au