Some viewers complained after eventual runner-up Ferne McCann swallowed a large, live spider in her final Bush Tucker Trial in order to win meals for camp.
Nearly 1,500 people contacted Ofcom to voice complaints.
But in a statement, the regulator said no action would be taken against the reality show as the spider eating task wasn't out of place considering the nature of the show.
A spokesperson said: "In our view, this task was in keeping with the well-established format of this reality series and was unlikely to have exceeded audience expectations. We also took into account that ITV had taken steps to limit any offence resulting from the inclusion of this task."
A rep for ITV had said in December: "I'm A Celebrity complies with all regional and international laws concerning the use of insects in the eating trials, which have become a well-established part of the show over the past 15 years."
After leaving the jungle, TOWIE star Ferne admitted the spider eating trial had been "horrendous" but she wanted to complete it for her campmates.
"It was the most awful thing ever. It was alive. It was a huge, giant spider," she told ITV's Good Morning Britain.
"I didn't have to do it, but from the beginning I said I'm not going to quit. I'm going to give it my best. It was my last Bushtucker trial so I just thought I've got to give it my best shot," she said. "I had to eat it. There was no question about it."
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