One I'm A Celebrity campmate who is facing an extra challenge is Jack Osbourne. The 40-year-old son of the infamous Prince of Darkness, Ozzy Osbourne, has a number of health issues that could make his time on the ITV show much more difficult.

When Jack was 26 years old, he received a diagnosis of relapsing-remitting multiple sclerosis (RRMS). According to the NHS website, multiple sclerosis (MS) is an incurable neurological condition that damages the nerves and affects the transfer of messages around the body. It is often advised with this illness to maintain a balanced and healthy diet to help keep symptoms at bay - something that will be difficult to do when living off unusual animal parts, rice and beans in the Australian jungle. The MS Trust website states the importance of a healthy and balanced diet when suffering from the illness. It says: "A Good diet can play an important role in managing symptoms such as depression, fatigue and constipation, whilst a poor diet can result in a worsening of some symptoms, for example, pain or weakness.

"A poor diet can also put you at risk of other diseases, such as vascular disease or osteoporosis. Where your MS results in you having reduced mobility, then these diseases can be more likely and also more difficult to manage."

However, a spokesperson for the charity exclusively told Express.co.uk: "MS is different for everyone, and Jack clearly feels well enough to compete in the jungle right now. A healthy diet is recommended for people with MS, but a few weeks of basic camp food is unlikely to be a problem for Jack.

"Although some insects are potentially edible and nutritious, we have no evidence or advice to say that they would be good or bad for people with MS. We wish Jack all the best with the challenges, and hope he is able to pace himself, stay well and entertain the viewers."

Since being diagnosed, Jack has also competed in Strictly Come Dancing US in 2013, where he danced his way all the way to the final.

At the time, he wrote on Facebook: "One of the first questions I was asked was, 'How will having MS affect your ability to perform throughout the season?' The truthful answer is... I had no idea."

He added: "I've been able to maintain a very active and somewhat healthy lifestyle. I hadn't had the opportunity to really figure out my limitations."

But then in 2023, Jack's illness was pushed to the limit when he participated in Special Forces: World's Toughest Test - the American version of SAS: Who Dares Wins.

He had to pull out of the show in episode six due to medical reasons as show medics became worried about his elevated heart rate.

Speaking to Entertainment Weekly at the time, he said: "The show's doctors were more concerned than I was. I'm pretty healthy considering I'm living with MS, but it doesn't present itself daily for me.

"I've been, touch wood, going pretty strong, and I don't have any issues with it right now. So that wasn't a concern."