These pictures show the stunning transformation of a teenage cancer patient into a bodybuilder, whose inspiring selfies have earned him a massive online following.
Zach Zeiler, from Ida, Michigan, was diagnosed with Hodgkin's Lymphoma in 2010 at the age of 15 - which saw his weight plummet to just 100lbs.
But as his photos show, Zach went on to beat cancer and now weighs nearly 175lbs.
As well as his family, Zach's girlfriend, Tara Hurley, 21, was distraught upon hearing about his illness - but stood by him throughout his treatment.
'I pulled her in close and put her head on my shoulder. She was absolutely devastated' said Zach's mother.
Zach added: 'I asked Tara out two months before my diagnosis - I snuck over to her house on Christmas Day and wrote out "will you go out with me" in Lincoln Logs.
'We have been together for almost five years now - and she's been by my side through everything.'
His impressive physique is the result of working out for two hours each and every day - which he began during treatment.
“I started lifting after my radiation treatments because I knew it would help me gain weight and look less sickly,” Zeiler told MailOnline. “It was a great way to channel a lot of the anger I felt — and I got addicted to it, it became my passion.”
He posts his progress on Instagram where he has over 41,000 followers.
