The Biggest Loser is looking for teams consisting of two generations of one family in the next series to help try to break the hand-me-down cycle of obesity.
Executive producer of the Network Ten series Stuart Clark says the breakdown could be parent and child, grandparents and grandchildren or even uncles and aunties with their nephew or niece.
The search for teams started about a fortnight ago and Clark hopes to have the 16 contestants for the eighth season of The Biggest Loser finalised by mid-October.
"We're looking at the whole issue of generational weight issues, which is significant within society," Clark tells AAP.
"We've tackled families and we've tackled singles and this year tackling generational weight issue is what we need to be doing."
Clark says the show is designed to provide inspiration for all people with weight issues and he's hoping the new series will dig deeper into the psyche of generational obesity.
Even though The Biggest Loser wants two generations from the one family, competitors have to be at least 15 years old to be selected.
"We think for children under 15 it becomes a lot harder to nurture them and give them everything they need," Clark says.
"Hopefully parents with younger kids will take on the teachings and attitudes that flow out of the show and break their own cycle at home."
Being obese may be the one major requirement to be on The Biggest Loser but it's far from the only criteria.
Clark says the selection process includes psychological profiling of all contestants.
"We do a complete physical, medical, police and psychological check on every contestant before they enter the house," he says.
"We want to make sure that if there are any medical issues that it can be managed.
"In terms of other issues, addiction to foods or alcoholism we look at those things, we work out who we can take into the house and who we can make a change to.
"We have to be careful that we pick people who we can change their lives and not make it harder for them."
Clark says if contestants did not fit the generational criteria for next season, they should still submit their details on www.thebiggestloser.com.au as they are kept on a database for future shows.It's expected 2000 people will apply for next season. This figure will initially be whittled down to a short-list of 50 before the show's producers settle on the final contestants.