Doctor issues cockroach warning to coffee drinkers.

If you're someone who can't make it through the day without a boost of caffeine in the form of coffee, it might be time to look away. Dr Karan Raj, who racks up millions of views on TikTok with his informative videos, issued a gross warning for people who buy pre-ground jars of coffee - and people have sworn off the hot drink as a result.

In a clip that has racked up 1.5 million views, the doctor decided to drop the bombshell that if you drink pre-ground coffee, there's a high chance you're also knocking back some crushed up cockroaches.

He explained: "Pre-ground coffee, like you get in most stores, contain ground-up cockroaches. A certain percentage of coffee beans become infested with cockroaches and other insects.

"Usually they can't be processed out completely, so they just get roasted and ground up with the coffee beans. Most food authorities allow for a certain percentage of bug parts in our food."

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He tried to rescue it slightly by adding: "Cockroaches are high in protein", before warning: "If you're allergic to cockroaches, I'd stay away from pre-ground coffee."

The unneeded piece of information has been viewed more than 1.5 million times (Image: TikTok)

And the theory has been backed up by University of Montana biology professor Douglas Emlen, who says after years of studying insects and their relationships with humans, one of his old professors became badly allergic to cockroaches from handling them so often.

He couldn't touch a cockroach without getting a reaction and found he suffered similarly when he drank coffee made from pre-ground beans. When he looked into the reason why, he said he found pre-ground coffee is all processed from huge stock piles, which are near impossible to protect from cockroach infestation, as Dr Raj said.