What would you do to lose weight once and for all? Would you bet money, say $30,000?
That's what Phyllis Briggs did after struggling her whole life with her weight.
She asked Downsize Me host Damien Kristoff for help, and now the dynamic duo have started up their own health and weight loss programme – and it seems to be working. Their 100 clients who paid around $1400 each have lost almost one tonne.
Kristoff measures success in hugs and smiles. The Downsize Me host has been preaching the benefits of healthy eating for years, and his words have sunk in to a group of former dieters.
Ms Briggs had tried most diets, then last year she decided she'd had enough of herself.
She runs several companies, so she knows a big challenge when she sees one. That's why she asked Kristoff to help out - then she did something silly.
"I decided I would have a massive consequence, 'cause I work well under pressure," she says. "So I set up that if I didn't lose 30kg, I would lose $30,000. Everybody thinks I had this pile of money in the back room, but it never existed. But the thing is I would've legally had to come up with it."
Out of that crazy idea came a sensible one. Ms Briggs and Kristoff set up a 112-day challenge programme for people targeting health, with the promise of weight loss. It's long enough to make a life change.
This weekend 33 challengers have come together for a health retreat to learn more and cement their new good habits.
When the food arrives for the weekend, many are confused. According to Kristoff you can eat fat - just stay away from the processed and packet stuff, including diet food, and watch that portion size. Fresh is best.
"It's not that we're eating bucket loads of fat," he says, "it's we're eating bucket loads of carbs. It's not that grains are bad - it's the quality of grains we're eating. The food pyramid tells us to eat between six and 11 serves of processed grains, or grains, which mean you've got to have two serves with every meal."
Before they start the challenge, each person has a blood test to see what food their body best operates on, which naturally leads to weight loss and better health.
The proof is in the photos - there's no pudding here. Rachel Cooke has lost 41kg. And it's not just weight - their body's biological ages have dropped too.
The 100 people who've done the challenge have lost almost a tonne of weight, and with what they've learnt, Kristoff expects them to keep it off.
For more on the 112 day weight challenge click here