Jaw dropping simulation shows what happens to your body while fasting for 36 hours to achieve 'full reset'

A jaw dropping simulation shows how quickly your body might change if you fast for 36 hours.

Whilst the idea of missing three meals a day is likely to send a shiver down your spine, or your belly, it turns out that throughout history we used to not eat all the time.

Dr Valter Longo, a longevity researcher at the University of Southern California, told NIH that in the olden days, people were forced to go without food for long periods when it wasn't available, adding: “So, they were forced to fast.”

In a modern world, however, food is pretty much available everywhere, depending on where you live.

“This has shifted our eating patterns,” noted Dr Vicki Catenacci, a nutrition researcher at the University of Colorado. “People now eat, on average, throughout a 14-hour period each day.”

What happens if you fast for 36 hours?

Fasting for 36 hours can significantly impact the body (Getty Stock Images)

So after just four hours of fasting, insulin levels drop and the body begins burning stored sugar. Then by eight hours, blood sugar levels decline and glycogen is used for energy.

At 12 hours, fat burning starts, and insulin levels decrease, which leads to ketosis. After 16 hours, autophagy - consumption of the body's own tissue - activates, breaking down damaged cells and toxins.

And by 24 hours, major cellular repair occurs, inflammation reduces, and insulin sensitivity improves.

You start getting results at around 30 hours when growth hormone spikes, helping to preserve muscle and promote fat loss.

Maximum autophagy is reached at 36 hours, clearing dead cells, regenerating tissues, and boosting metabolism, providing a full body reset.

YouTube channel Wellness Wise provided a simulation of this, which you can see below:

What do the experts say about fasting?

As reported by The Guardian, associate professor of nutrition at the University of Surrey, Adam Collins, said the results from his own fasting study involving humans suggested that a stricter fast increases the process of burning fat instead of carbs.

Although Collins warned that much of the general research has been done on animals such as rodents, that tend to fast for longer times.

“Whether you can get those effects with just a 36-hour fast once a week, [I’m] not sure,” he said.

James Betts, professor of metabolic physiology at the University of Bath, agreed: “There [are] a lot of proposed benefits to [running on fats]. But a lot of the research hasn’t really [been borne out in] human beings. So we don’t see dramatic health benefits, certainly in the short term.

“And you can tend to be a little physically inactive during the fast as well because you just don’t have the energy levels for that.”

John Hopkins Medicine also suggests fasting longer than 24 hours may not be better for you necessarily, or could even be dangerous as 'going too long without eating might actually encourage your body to start storing more fat in response to starvation'.