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A BBC Radio icon has admitted to feeling "low" due to his health in a heartbreaking health update this week. Radio 2 DJ Bob Harris has shared an update on Instagram on his ongoing prostate treatment. The 79-year-old presenter said in a social media post this week that he was feeling "very low" due to the side effects of his treatment. He has lived with the disease since he was diagnosed in 2007. The star has been being supported by his fellow BBC colleagues including Dermot O'Leary and Zoe Ball. His friends and colleagues have been leaving supportive comments alongside his social media posts. Bob shared a selfie while he wrote: "I am so grateful for my cancer treatment but there are times when the side effects are really tough. Feeling very low tonight. Tomorrow I go again…" Colleagues left supportive comments, with presenter Paddy McGuinness saying: "I need you up and at um Bob! You’re the Governor!!!" Zoe Ball said: "Darling chap. Sorry to hear today hasn't been so good. all the love to you. You're very brave and loved xxxx." Dermot O'Leary added: "You're the best champ! X." Annie Lennox said: "Much love to you Bob… from Annie." Bob told his fans back in 2023 that he counts "every day as a blessing" as he has routine top-up treatments for the disease. He said: "I occasionally have to go through moments of intensive top-up treatments, and I have to take some pretty hefty daily medication to keep my cancer under control, the difficult side effects of which can often bring my emotions far too close to the surface! "But my cancer was detected early and I count every day as a blessing. My massive advice to any male over 50 reading this is GET YOURSELF CHECKED if you haven’t already. The blood test only takes seconds and it could save your life!" Bob first became well known when he co-founded Time Out magazine in 1968. He then went on to join the BBC in 1970 and has had sevearl roles across its radio channels over the last 50 years. He was the host of the award-winning BBC TV music show Old Grey Whistle Test throughout the 1970s where he would interview iconic musicians. Back in 2019 Harris took a break from presenting after rupturing his aorta. He underwent emergency surgery, which he said he was "lucky to survive". He said at the time: "Ten days ago, while out walking, I suffered a tear to my aorta known as an aortic dissection. The aorta is basically the M1 of the body and any damage is regarded as extremely serious." "For the past few years, I have been walking an average of five miles a day and I am convinced that the level of fitness I have achieved during that time helped save my life," he added. Like this story? For more of the latest showbiz news and gossip, follow Mirror Celebs on TikTok , Snapchat , Instagram , Twitter , Facebook , YouTube and Threads .