Olivia Attwood left the jungle after medics were concerned over the results of a health test in camp.
The 31-year-old was happy and content on the show but concerns were raised by a member of the crew following a standard test that the celebs do behind the scenes during the series.
And after further checks were made away from the jungle it was ITV's decision to remove Olivia from the show.
One friend said: "This has nothing to do with her ADHD or anxiety.
"Olivia wasn’t feeling ill, unwell, she was perfectly fine. There was just something that came up which concerned the show's medical team and it escalated from there.
"The medical team runs tests with the celebs throughout the series to make sure they are all OK. Health and safety is paramount on a show like this where people are sleeping in a jungle and taking on huge challenges without much food or drink.
"Olivia was very keen to continue and was gutted when she was told that having left camp for tests she was not going back. Her I'm A Celebrity journey was only just beginning and she is devastated."
News that Olivia had left the show broke on Monday morning in the UK.
A show spokesman said "As a precautionary measure Olivia needed to leave the jungle to undergo some medical checks. Unfortunately, the medical team has advised it is not safe for Olivia to return to camp as there needs to be further investigation. She has been absolutely brilliant and she'll be very much missed on the show.”
Olivia is understood to have begged to be allowed to rejoin her campmates, including Boy George and Mike Tindall.
However, the “heartbroken” TV star had no option but to fly home yesterday.
On the second episode of the series, show host Dec said: "Unfortunately, Olivia Attwood has left the jungle for medical reasons and sadly won't be returning."
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Ant added: "Now, she does feature in tonight's show, which was filmed before she had to leave. We’re very sad to see her go and we wish her well."
Olivia's PR team also posted a statement from the star on her Instagram, after they held phone meetings whilst she was mid-air flying back to London.
A spokesperson told her 1.9 million followers on Instagram: "To say Olivia is heartbroken would be an understatement. She dreamed of doing 'I'm A Celebrity' for years, and was absolutely loving every second of the show and throwing herself into jungle life feet first(just as we knew she would). However for reasons beyond her control her journey has been cut short. Your support and kind words have meant the absolute world to her, now as much as it always has.
"You will hear the truth from Olivia in due course and she will be back on screen in the new year. PS Who is going to roast Matt Hancock now??."
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