On January 1, Andrew Taylor vowed to eat nothing but potatoes for an entire year after realising he was "addicted to food".
Now almost a year later, the Melbourne local says it was the best decision he's ever made.
"If you have a drug, alcohol or gambling addiction, the best thing you can do is to quit those things cold turkey and to never touch them again.
"Unfortunately you can't do that with food. My next thought was to try to get as close as possible to quitting food," he wrote on his blog.
Mr Taylor decided he would limit himself to just potatoes because the vegetable offered him the right vitamins and minerals as well as proteins and fat.
He eats all kinds of potatoes, including sweet potato/kumara, as well as a small number of condiments to flavour his meals.
He says his extreme diet has helped him lose over 50kg as well as curing his depression and anxiety.
"I sleep better, have improved mental clarity and focus, my joint pains from old football injuries are gone, my cholesterol and blood pressure are way down."
"In short: I am fitter and healthier than I've ever been in my adult life."
He says he started the challenge because he wanted to have a better relationship with food.
"My hope for this year was that I would be able to retrain my brain to get comfort, pleasure and emotional support from other areas of life."
Mr Taylor has blogged his entire experience and shared many posts online with the aim of helping others who also have an unhealthy relationship with food.
His posts have attracted 19,000 followers on Facebook and thousands more on Youtube.
For the record, his favourite meal is mashed potatoes.