A science experiment showing just what happens when Coca Cola is swallowed will leave soft drink lovers feeling sick in the stomach.

Video of the fizzy reaction between Coke and a substance said to simulate stomach acid is a worrying sign for regular consumers of the sweet drinks, according to Daily Mail.

The footage, shared online by Molten Science, shows the two substances bubbling and fizzing from the instant they come in contact - before quickly going on to look like something that should not be inside your stomach.

As the coke is added slowly to the acid, the bubbles quickly rise higher and higher until they eventually spill over the glass.


While the newly formed substance initially moves easily, within minutes it begins to harden and smoke starts to rise from the foam.

Soon, the disgusting dark mass grows to resemble something more like road tar, to the point that it's hard to push a wooden stick through the mixture.

Not only does the substance toughen up, but it also increases in temperature, with the scientist touching the glass and remarking about its warmth.

While the incredible experiment has had its fair share of critics saying the acid used is not similar to stomach acid, others have defended the way it was conducted.

"I can tell you with 100% certainty, from my own personal observation, that this also happens in the human stomach," one woman commented on the video.

However all were seemingly in agreement that this substance is not something they would like to have inside their stomach.

The disgusting dark mass soon grows in a hard substance, resembling something like road tar.
The disgusting dark mass soon grows in a hard substance, resembling something like road tar.

So far the video has been viewed more than 9 million times on Facebook alone.

It comes just months after an experiment showcased the enormous amount of sugar in normal Coke, compared to cans of Coke Zero.

When Coke and Coke Zero were poured into a pan and boiled, they both began to break down.

However while the sugar-free drink left only a small amount of caramelised sugar in the pan, a thick dark tar remained when the classic Coke was boiled.