It's a worrying trend that we're seeing more of in recent headlines - otherwise healthy people under the age of 50 being diagnosed with cancer.
Evidence suggests more adults in their thirties and forties are getting cancer than ever before, leaving experts trying to figure out why. Take Kate, Princess of Wales, 42, who was told she has cancer after post-operative tests following abdominal surgery diagnosed the disease. She is known to lead a healthy lifestyle with plenty of exercise. The future Queen is now receiving preventive chemotherapy.
There was Manchester dad and avid mountain climber, Bobby Power, who died aged 40, seven months after a pancreatic cancer diagnosis. Followers were devastated by the former United youth footballer's decline from a fit and healthy young man as the disease progressed.
Just a few weeks ago, The Mirror reported the tragic story of Rebecca Gibson, a mum-of-two who was diagnosed with terminal bowel cancer - five years after first visiting the GP about her symptoms. She is just 36 years old.
Thankfully, researchers are looking to find better treatments and cures, with the world's first personalized mRNA cancer jab for melanoma now being tested on British patients. The 'game-changing' jab, which is custom-built for each person and can tell the body to identify cancer cells and stop them returning, also has the potential to stop bladder, lung and kidney cancer.
Here, The Mirror takes a look at what studies and experts say about the trends of early-onset cancer, and the potential links between diet changes, damaging the gut microbiome with antibiotics and accelerated aging cells...