He captioned the shirtless pic with, "I never do this but... Healthy living and fitness update. Post workout picture. #diabeticinshape #2.0."
Jonas, 20, was diagnosed with Type 1 Diabetes when he was 13.
He once told Kids Health, “At first it was really hard on [my family] because we didn't know how it would affect our daily lives. I actually asked my doctor if I could die. Fortunately, we were blessed to have great medical care and learned how to manage diabetes.”
Nick Jonas’ Instagram followers were hot and bothered when the singer posted a sexy selfie showing off his six pack.