The former Miss Earth New Zealand has traded her tiara for a tray of doughnuts, scoffing a dozen of the sweet treats in less than two minutes

• Former Miss Earth New Zealand Nela Zisser completed the challenge
• She ate the dozen doughnuts in quick succession, pausing only for water 
• The model is a competitive eater, and takes part in a number of challenges
• She has previously eaten a one kilogram burger in less than four minutes 
• Despite the high-calorie binges, Miss Zisser exercises regularly 

Most models nibble on a handful of nuts and call it a 'cheat day'. Not Nela Zisser. 

The former Miss Earth New Zealand has traded her tiara for a tray of doughnuts, scoffing a dozen of the sweet treats in less than two minutes.

In just 96 seconds, Miss Zisser devoured 12 Krispy Kreme Original Glazed doughnuts - or 2,808 calories.

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And we're off! Model Nela Zisser scoffed a dozen Krispy Kreme Original Glazed doughnuts in 96 seconds

Using technique: Miss Zisser gulped down water in between bites, ensuring the doughnuts went down smooth

All done: In just 96 seconds, Miss Zisser had finished the box, opening her mouth wide to the camera

When she is not in hair and make-up for a fashion shoot or strutting her enviable figure on the runway, 23-year-old Miss Zisser is a competitive eater.

The calorie-laden hobby is a stark contrast to most models' diets, who credit leafy greens and steamed vegetables for their lean physiques.

Miss Zisser's YouTube channel contains videos of her indulging in a number of eating challenges - including a one kilogram burger in less than four minutes, 120 chicken nuggets in just over 16 minutes and a 2.3 kilogram burrito in five minutes.

Challenge accepted: It took Miss Zisser less than four minutes to eat a one kilogram burger

The latest Krispy Kreme challenge seems to be over before it even begins.

Miss Zisser takes her first time eating Krispy Kremes seriously as she takes her place behind the doughnut box in a Sydney store, a drink of water at the ready.

As the timer clocks over, she shoves the first doughnut in to her mouth and devours three quarters of the treat before taking a gulp of water and shoveling the rest in.

Where does she put it? Miss Zisser stays in shape by exercising, doing yoga and surfing

WHAT HAPPENS TO THE BODY AFTER EATING A DOZEN DOUGHNUTS?

Sydney nutritionist Raj Barker breaks it down:
'Nela will probably experience a surge of energy, alertness and generally feel quite good. 
'Cut to one to three hours later and I'm afraid her situation will have done a 180.
'Most likely she will experience reactive hypoglycemia, her blood sugar levels will drastically drop and she could develop feelings of anxiety, headaches, shakiness, nausea, weakness and fatigue depending on her hydration and on the other foods she has consumed that day. 
'If eating in this way this is a regular thing, her risk of diabetes is elevated along with a plethora of other health conditions including gut issues, heart disease and believe it or not, obesity. 
'It is simply not a sustainable way to eat.'

She moves swiftly through the box, pausing only to take more sips of water.

Miss Zisser told Daily Mail Australia rather than hindering her modelling career, competitive eating had opened doors for more opportunities.

She has done appearances at events and it currently collaborating with the restaurant Wow Wow Wow to organise an eating competition for charity.   

Down the hatch: Forget a glass of milk before bed, Miss Zisser sculled a three litre bottle 

Miss Zisser said when she is not stuffing her face she lived a relatively healthy lifestyle.

Her modelling agents, she said, have no problem with her hobby and she kept her size 6 to 8 figure in shape by doing yoga and surfing. 

'Health-wise there are much worse things you could do to yourself,' she told Daily Mail Australia.

Brunette beauty: Miss Zisser is a former Miss Earth New Zealand and model

'I don't smoke, I don't drink, I keep relatively fit and I eat pretty well except for the competitive eating.'

Staying in shape is also important for competition.

'Especially in long competitions you need to be quite fit and have good stamina to keep up,' Miss Zisser said.

'If you have fat across your stomach it's harder to expand.' 

Interesting hobby: In her spare time, the model is a competitive eater, scoffing burgers, sushi and burritos

Miss Zisser said compared to the 120 chicken-nugget challenge, scoffing 12 Krispy Kremes was relatively easy.

'Normally for a few hours afterwards you won't be hungry,' she said.

'But after the Krispy Kreme challenge, that wasn't that much food, I had a steak afterwards.' 

Fast metabolism: Despite her calorie-laden hobby, Miss Zisser said competitive eating has led to career opportunities